ChatGPT launched on November 30, 2022, as OpenAI’s public AI assistant. This timeline tracks the GPT models and product releases that shaped ChatGPT, from GPT-1 and GPT-3 to GPT-4, GPT-5, Codex, Sora, and the GPT-5.6 family.
The quick release table lists the main model and product dates. The year-by-year timeline adds launches, access changes, APIs, subscriptions, safety updates, and other events from 2018 to the present.
The latest product update is ChatGPT for Teens, a learning-focused experience for teens with stronger built-in protections, parent controls, and healthy-use features. Other recent updates include Computer History, which lets ChatGPT remember activity across selected apps and websites, and a preview of Ultrafast mode for GPT-5.6 Sol at up to 14 times the speed.
The newest model release is GPT-5.6-Cyber, a cybersecurity-specific model available to approved defenders for advanced vulnerability research, exploit validation, and authorized security testing.
Last updated: August 18, 2026
GPT Model and ChatGPT Release Dates
| Model or Product | Release Date | Key Highlight |
|---|---|---|
| ChatGPT for Teens | August 18, 2026 | Learning-focused ChatGPT experience for teens with stronger default protections, parent controls, and healthy-use features. |
| GPT-5.6 Sol Ultrafast mode preview | August 13, 2026 | Preview mode that runs GPT-5.6 Sol at up to 14 times the speed. |
| ChatGPT Computer History | August 13, 2026 | Optional desktop feature that turns activity across selected apps and websites into memories and a timeline for future chats. |
| GPT-5.6-Cyber and expanded Daybreak access | August 10, 2026 | Cybersecurity-specific model for approved Daybreak Red users, plus Daybreak Blue access to GPT-5.6 Sol for authorized defensive work. |
| GPT-5.6 Sol and Luna in ChatGPT | August 6, 2026 | More focused GPT-5.6 Sol answers for Plus and Pro users, plus broader GPT-5.6 Luna access and unlimited text chats for Free and Go users. |
| OpenAI Presence | July 22, 2026 | Enterprise product for deploying and improving voice and chat agents under company policies, permissions, and approval controls. |
| GPT-5.6 Sol, Terra, and Luna | June 27, 2026 | Limited preview of the GPT-5.6 series, with new Sol, Terra, and Luna capability tiers. |
| GPT-5.5 | April 23, 2026 | Frontier model for coding, research, computer use, documents, spreadsheets, and long-running work. |
| ChatGPT Images 2.0 | April 21, 2026 | New ChatGPT image generation experience and model generation. |
| GPT-5.4 mini and nano | March 17, 2026 | Smaller GPT-5.4 models for faster and lower-cost workloads. |
| GPT-5.4 | March 5, 2026 | Frontier model for professional work across reasoning, coding, agents, and tool use. |
| GPT-5.3-Codex-Spark | February 12, 2026 | Ultra-fast research preview model for real-time coding in Codex. |
| GPT-5.3-Codex | February 5, 2026 | Agentic coding model for professional software and computer-based work. |
| GPT-5.2-Codex | December 18, 2025 | Agentic coding model for complex software engineering and defensive cybersecurity. |
| GPT Image 1.5 | December 16, 2025 | Improved ChatGPT Images model with faster generation and stronger editing. |
| GPT-5.2 | December 11, 2025 | Frontier model series for professional knowledge work and long-running agents. |
| GPT-5.1 | November 12, 2025 | ChatGPT update with GPT-5.1 Instant and GPT-5.1 Thinking. |
| Sora 2 | September 30, 2025 | Video and audio generation model with stronger physics, realism, and control. |
| GPT-5 | August 7, 2025 | Unified GPT-5 system for ChatGPT and developers. |
| Codex | May 16, 2025 | Cloud-based software engineering agent. |
| OpenAI o3 and o4-mini | April 16, 2025 | Reasoning models with tool use across ChatGPT. |
| GPT-4.1 | April 14, 2025 | API model series for coding, instruction following, and long context. |
| 4o image generation | March 25, 2025 | Native image generation in GPT-4o and ChatGPT. |
| GPT-4.5 | February 27, 2025 | Research preview of a larger GPT model for chat. |
| OpenAI o3-mini | January 31, 2025 | Cost-efficient reasoning model for STEM, coding, and math. |
| ChatGPT search | October 31, 2024 | Web search experience inside ChatGPT. |
| Canvas | October 3, 2024 | Separate workspace for writing and coding with ChatGPT. |
| OpenAI o1-preview | September 12, 2024 | First public reasoning model series from OpenAI. |
| GPT-4o | May 13, 2024 | Omni model for text, audio, vision, and real-time interaction. |
| ChatGPT plugins | March 23, 2023 | Early tool system for ChatGPT, later deprecated. |
| GPT-4 | March 14, 2023 | Large multimodal model with text and image input. |
| ChatGPT Plus | February 1, 2023 | Paid ChatGPT subscription plan. |
| ChatGPT | November 30, 2022 | Public research preview of ChatGPT. |
| GPT-3 | May 28, 2020 | 175B-parameter language model for few-shot learning. |
| GPT-2 | February 14, 2019 | Large unsupervised language model and staged release milestone. |
| GPT-1 | June 11, 2018 | Early generative pre-training system for language understanding. |
Latest ChatGPT and OpenAI Releases
ChatGPT for Teens
OpenAI introduced ChatGPT for Teens on August 18, 2026. It is designed to help teens learn, think critically, deepen understanding, and use AI with confidence. OpenAI says its system automatically places users it estimates are under 18, as well as users who state that they are between 13 and 17, into this experience.
The learning features include Study Mode, responsible homework reminders, Quizzes, Learning Visualizations, and Study Hours. Study Mode uses guiding questions and step-by-step support, while homework reminders can redirect apparent attempts to shortcut an assignment toward collaborative problem solving. Teens or parents can choose times when Study Mode is on by default.
Protections are enabled by default for teen users. The experience applies age-appropriate safeguards in higher-risk areas such as self-harm, violence, eating disorders, dangerous activities, and explicit sexual or graphic content. Parents with linked teen accounts can set Quiet Hours, manage selected settings, and receive limited safety notifications, including new notifications related to eating disorders.
ChatGPT for Teens also adds break reminders, clear cues that identify ChatGPT as AI, sensitive-image upload reminders, teen-specific onboarding, and simple customization options. OpenAI’s updated under-18 model spec says ChatGPT should not use romantic language, encourage emotional dependence, or imply that it has feelings or consciousness. OpenAI also announced a partnership with CodeAI to give students and educators more resources for learning how AI works and how to question, direct, and create with it.
GPT-5.6 Sol Ultrafast Mode Preview
OpenAI previewed Ultrafast mode for GPT-5.6 Sol on August 13, 2026. The preview can run GPT-5.6 Sol at up to 14 times the speed.
ChatGPT Computer History
Computer History turns activity across selected apps and websites into memories and a timeline that ChatGPT and Codex can reference later. You can return to recent work without reconstructing every open app, document, and next step.
Computer History is off by default in the ChatGPT desktop app on macOS. Pro users can turn it on. Business and Enterprise users need access from a workspace administrator before they can opt in. The feature requires Memories, does not work with an API key or Amazon Bedrock, and is unavailable in the European Economic Area, Switzerland, and the United Kingdom.
You control which apps and websites contribute. Computer History records interaction events and creates text summaries. It does not capture your screen or audio. Collection can be paused from the macOS menu bar, and each history item can be inspected or deleted.
GPT-5.6-Cyber and Expanded OpenAI Daybreak Access
OpenAI introduced GPT-5.6-Cyber on August 10, 2026. The cybersecurity-specific model is built on GPT-5.6 Sol and trained for advanced work such as finding zero-day vulnerabilities, developing exploit chains, validating exploits, and conducting authorized security tests.
The Daybreak program has two access tiers. Daybreak Blue gives approved defenders access to frontier general-purpose models, including GPT-5.6 Sol, with safeguards adjusted for secure code review, malware analysis, incident response, vulnerability discovery, and patch validation. Daybreak Red includes purpose-trained cyber models for higher-risk authorized research, including GPT-5.6-Cyber.
In OpenAI’s internal Advanced Cybersecurity Completion Rate evaluation, GPT-5.6-Cyber completed 95.0% of requests involving advanced scenarios such as exploit-chain development, authentication bypass, and privilege escalation. GPT-5.5-Cyber completed 57.3%, while GPT-5.6 Sol completed 1.5% with standard safeguards and 2.0% through Daybreak Blue.
The specialized model did not lead every evaluation. GPT-5.6-Cyber outperformed GPT-5.6 Sol and GPT-5.5-Cyber on ExploitGym and scored higher than GPT-5.6 Sol in OpenAI’s zero-day discovery evaluation. GPT-5.6 Sol produced stronger results in OpenAI’s vulnerability discovery and report-writing evaluation and performed best in the standard 300-turn ExploitBench setting.
OpenAI used GPT-5.6-Cyber to investigate Chrome’s V8 JavaScript engine and reported two previously unknown vulnerabilities to Google. Google fixed the disclosed issue as CVE-2026-15903. OpenAI also reported findings in a mobile operating system, a popular database, and an operating system kernel. Coordinated disclosure and remediation are underway.
OpenAI assessed GPT-5.6-Cyber as High for cybersecurity capability but below the Critical threshold. Access to both Daybreak tiers is limited to approved individuals and organizations conducting authorized work. Controls include identity verification, account security, monitoring, approved-use restrictions, and legal attestations. Individual Daybreak accounts must use hardware security keys beginning September 1, 2026.
GPT-5.6 Sol and Luna in ChatGPT
OpenAI updated GPT-5.6 Sol in ChatGPT on August 6, 2026, for Plus and Pro users. The model adjusts detail to each question, uses tighter formatting, and pushes back more often when a correction would help.
The same GPT-5.6 Sol model now handles both Instant responses and deeper reasoning in ChatGPT. A new slider on the web, mobile, and desktop apps lets Plus and Pro users choose how much thought the model uses for each response.
OpenAI says answers containing at least one factual error were about 68% less common with GPT-5.6 Sol than with GPT-5.5 Instant in an internal evaluation of financial, medical, and legal prompts. The corresponding reduction for GPT-5.6 Luna was about 62%.
OpenAI announced GPT-5.6 Luna as the default model for Free and Go users during the week of August 6. It also announced unlimited text chats and a Think button for the following week. Abuse guardrails apply, and file uploads, images, and other tools have separate limits.
This version of GPT-5.6 Sol is tuned for everyday conversations and is available only in the standard Chat experience. ChatGPT Work and Codex keep their existing GPT-5.6 Sol version.
The release also adds age-appropriate protections for users OpenAI believes are under 18. The model avoids romantic roleplay and age-restricted challenges, applies tighter boundaries to sensitive and dangerous content, and encourages contact with trusted people when a teenager may need support.
OpenAI Presence
OpenAI introduced OpenAI Presence on July 22, 2026. The enterprise product supports voice and chat agents that can answer questions, resolve issues, use company systems, take approved actions, and transfer work to people when needed.
Each deployment starts with a defined job and receives only the knowledge and system access required for that work. The customer sets permissions, policies, approval requirements, and escalation rules. Before launch, simulations and graders test outcomes, policy compliance, tool use, and escalation behavior.
After launch, production sessions and quality signals show where the agent needs attention. Codex uses the Presence plugin to investigate those signals and propose updates. Teams can compare each proposal with the production version, test it, and approve a controlled rollout.
Presence is available to eligible enterprise customers through a limited general availability program. OpenAI Forward Deployed Engineers and selected global systems integrators lead deployments, and the product is not available for self-service access. OpenAI says Presence now resolves 75% of inbound issues on its English-language phone support channel without human assistance. Its improvement process also reduced human handoffs by 15 percentage points in 10 days.
GPT-5.6
The latest major GPT model is GPT-5.6 Sol, introduced on June 27, 2026 in a limited preview of the GPT-5.6 series. The series has three tiers: Sol for the highest capability, Terra for everyday work, and Luna for faster, lower-cost use.
Sol is the top tier in the release. It adds a max reasoning effort for harder problems and an ultra mode that can use subagents for complex work.
On August 13, 2026, OpenAI previewed a separate Ultrafast mode that can run GPT-5.6 Sol at up to 14 times the speed.
Terra balances capability and cost. Luna targets cost-sensitive, high-volume workloads.
OpenAI first limited access to selected trusted partners through the API and Codex, then began a broader rollout across ChatGPT, Codex, and the API on July 9, 2026. The August 6 ChatGPT update gives Plus and Pro users the new chat-tuned version of Sol and expands Luna access for Free and Go users.
GPT-5.6 Sol improves results in coding, biology, and cybersecurity evaluations. It sets a new state of the art on Terminal-Bench 2.1, performs better than GPT-5.5 on GeneBench v1 with fewer tokens, and improves long-horizon security tasks in ExploitBench and ExploitGym.
Because GPT-5.6 is stronger in dual-use areas, the preview includes safeguards across the model, generation-time checks, account-level review, access controls, monitoring, enforcement, automated red teaming, and expert testing. GPT-5.6 Sol did not cross OpenAI’s Cyber Critical threshold in the reported tests.
OpenAI used more than 700,000 A100-equivalent GPU hours for automated red teaming aimed at universal jailbreaks. The tests targeted attacks designed to work across many prompts.
API pricing is listed per 1 million tokens: Sol at $5 input and $30 output, Terra at $2.50 input and $15 output, and Luna at $1 input and $6 output. All three models have a 1,050,000-token context window and a maximum output of 128,000 tokens. Cached input costs $0.50 for Sol, $0.25 for Terra, and $0.10 for Luna.
AI LLM API Pricing: GPT, Gemini, Claude Fable/Mythos, and More
OpenAI and ChatGPT Timeline
2026
| Date | Event | Details |
|---|---|---|
| August 18 | ChatGPT | OpenAI introduced ChatGPT for Teens, a learning-focused experience for teens with Study Mode, responsible homework reminders, stronger age-appropriate protections, parent controls, and healthy-use features. |
| August 13 | GPT | OpenAI previewed Ultrafast mode for GPT-5.6 Sol at up to 14 times the speed. |
| August 13 | ChatGPT | OpenAI introduced Computer History in the macOS desktop app. The optional feature turns activity across selected apps and websites into memories and a timeline that ChatGPT and Codex can use in future interactions. |
| August 11 | ChatGPT | You can now use ChatGPT, ChatGPT Work, and Codex where you already work and build, with your projects and browser workflows on supported Linux systems. |
| August 10 | GPT | OpenAI introduced GPT-5.6-Cyber, a cybersecurity-specific model built on GPT-5.6 Sol and available to approved defenders through Daybreak Red. OpenAI also added Daybreak Blue access to general-purpose models for authorized defensive security work. |
| August 06 | ChatGPT | OpenAI updated GPT-5.6 Sol for Plus and Pro users with more focused answers, stronger factual reliability, and a slider for choosing how much thought the model uses. GPT-5.6 Luna is becoming the default for Free and Go users, followed by unlimited text chats and a Think button the next week. |
| July 30 | API | OpenAI is making GPT-5.6 more affordable and faster. GPT-5.6 Luna now costs 80% less, GPT-5.6 Terra costs 20% less, and Fast mode gives API customers an option for faster access to GPT-5.6 Sol. Full API Pricing |
| July 28 | API | OpenAI introduced two new transcription models in the API: GPT-Live-Transcribe: built for low-latency live transcription. GPT-Transcribe: optimized for asynchronous transcription of completed audio files and batch workloads. |
| July 28 | Codex | OpenAI Open-Sourced Codex Security CLI and SDK for finding, validating, and fixing security vulnerabilities in your code. |
| July 23 | ChatGPT | You can now control your computer and direct multiple agents running in ChatGPT Work or Codex, using just your voice. |
| July 23 | ChatGPT | OpenAI is launching Health in ChatGPT. You can securely connect your health information to help you better understand and navigate your health. |
| July 22 | OpenAI Presence | OpenAI introduced OpenAI Presence, an enterprise product for deploying voice and chat agents with scoped system access, company policies, evaluations, guardrails, approved actions, and human escalation. Presence is available to eligible enterprise customers through a limited general availability program and is not self-service. |
| July 09 | ChatGPT | OpenAI introduced ChatGPT Work, a new agent in ChatGPT powered by Codex and GPT-5.6. It can take action across your apps and files, stay with a project for hours if needed, and turn a goal into finished work. |
| July 09 | GPT | Sol, Terra, and Luna, our GPT‑5.6 family of models, are starting to roll out now in ChatGPT, Codex, and the API. |
| July 08 | GPT‑Live | OpenAI introduced GPT-Live, a new generation of voice models that make talking with AI feel much more like having a real conversation. |
| July 06 | GPT-Realtime | GPT-Realtime-2.1-mini is now available in the API, bringing reasoning and tool use to our Realtime mini lineup at the same cost as GPT-Realtime-mini. |
| July 06 | ChatGPT | ChatGPT for PowerPoint is now generally available worldwide across all plans. |
| June 27 | GPT | OpenAI began a limited preview of the GPT-5.6 series: Sol, its flagship model; Terra, a balanced model for everyday work; and Luna, a fast and affordable model. The preview is initially available through the API and Codex to selected trusted partners. |
| June 24 | ChatGPT | OpenAI introduced a new version of GPT-5.5 Instant. It is now better at understanding the intent behind a question and adapting its response accordingly. |
| June 22 | OpenAI | OpenAI expanded Daybreak, its program for giving approved defenders access to frontier models and security tools. |
| June 17 | ChatGPT | The new scheduled tasks experience is rolling out to Go, Plus, Pro, Business, and Enterprise users on web and mobile. Scheduled tasks are faster, more reliable, and easier to manage from the new Scheduled page. |
| June 05 | ChatGPT | OpenAI is rolling out Dreaming, a more capable and scalable system for synthesizing memory. |
| June 03 | OpenAI | OpenAI introduced a new model update to its GPT‑Rosalind series purpose-built for life sciences research at enterprise scale. It combines GPT‑5.5’s agentic coding and tool-use capabilities with stronger model intelligence in core drug-discovery domains such as medicinal chemistry and genomics, while advancing performance across broader life sciences analysis, design, and experimental workflows. |
| June 02 | Codex | Sites is now available in preview in the Codex app. Use the Sites plugin to create, save, deploy, and inspect websites, dashboards, internal tools, web apps, and games hosted by OpenAI. |
| May 14 | ChatGPT | OpenAI is releasing a preview of a new personal finance experience in ChatGPT to Pro users in the U.S. Now you can securely connect your financial accounts, see a dashboard of where your money is going, and ask ChatGPT questions grounded in your financial context – all while staying in control of your data. |
| May 14 | Codex | Codex is now in the ChatGPT mobile app so you can stay in the loop from anywhere while Codex gets work done across your laptops, devboxes, or remote environments. |
| May 11 | OpenAI | OpenAI introduced Daybreak: frontier AI for cyber defenders. Daybreak brings together the most capable OpenAI models, Codex, and our security partners to accelerate cyber defense and continuously secure software. |
| May 11 | OpenAI | OpenAI announced OpenAI Deployment Company, a new company designed to help organizations build and deploy AI systems they can rely on every day across their most important work. |
| May 07 | OpenAI | OpenAI just released three audio models in the API that unlock a new class of voice apps for developers. See Pricing here. GPT‑Realtime‑2, OpenAI’s first voice model with GPT‑5‑class reasoning that can handle harder requests and carry the conversation forward naturally. GPT‑Realtime‑Translate, a new live translation model that translates speech from 70+ input languages into 13 output languages while keeping pace with the speaker. GPT‑Realtime‑Whisper, a new streaming speech-to-text that transcribes speech live as the speaker talks. |
| May 07 | Codex | Codex now works directly in Chrome on macOS and Windows. It’s even better at working with apps and sites in Chrome, and now works in parallel across tabs in the background without taking over your browser. To get started, install the Chrome plugin in the Codex app. |
| May 05 | ChatGPT | GPT-5.5 Instant is starting to roll out in ChatGPT. It’s a big upgrade, giving you smarter, clearer, and more personalized answers in a warmer, more natural tone. |
| May 05 | ChatGPT | ChatGPT is now available as an add-on in Excel and Google Sheets. It can help analyze messy data, write formulas, update spreadsheets, and explain what it’s doing along the way, without leaving your spreadsheet. |
| May 01 | ChatGPT | OpenAI introduced Advanced Account Security: a new opt-in setting for ChatGPT accounts, designed for people at increased risk of digital attacks, as well as for those who want the strongest account protections available. |
| Apr 23 | ChatGPT | OpenAI released GPT-5.5, their smartest and most intuitive to use model yet, and the next step toward a new way of getting work done on a computer. |
| Apr 22 | ChatGPT | OpenAI introduced workspace agents in ChatGPT. Teams can now create shared agents that handle complex tasks and long-running workflows, all while operating within the permissions and controls set by their organization. |
| Apr 21 | ChatGPT | OpenAI introduced ChatGPT Images 2.0, a state-of-the-art image model that can take on complex visual tasks and produce precise, immediately usable visuals, with sharper editing, richer layouts, and thinking-level intelligence. |
| Apr 21 | Codex | OpenAI releases Codex Chronicle feature for building Codex memories from recent screen context. |
| Apr 20 | Codex | OpenAI released Codex for (almost) everything. It can now use apps on your Mac, connect to more of your tools, create images, learn from previous actions, remember how you like to work, and take on ongoing and repeatable tasks. |
| Apr 16 | GPT | OpenAI introduced GPT‑Rosalind, frontier reasoning model built to support research across biology, drug discovery, and translational medicine. |
| Apr 15 | GPT | OpenAI announced GPT-5.4-Cyber: a version of GPT-5.4 fine-tuned for cybersecurity use cases, enabling more advanced defensive workflows. |
| Apr 09 | ChatGPT | OpenAI Launched a New $100/Mo ChatGPT Pro Subscription. See Pricing here. |
| Apr 03 | ChatGPT | ChatGPT is available in Apple CarPlay on supported iPhone models running iOS 26.4 or later. |
| Mar 27 | Codex | Codex now works seamlessly out of the box with the most important tools builders already use, like Slack, Figma, Notion, Gmail, and more. |
| Mar 17 | GPT | GPT‑5.4 mini and nano released. GPT-5.4 mini is more than 2x faster than GPT-5 mini. Optimized for coding, computer use, multimodal understanding, and subagents. For lighter-weight tasks, GPT-5.4 nano is our smallest and cheapest version of GPT-5.4. See Pricing Here. |
| Mar 12 | ChatGPT | OpenAI introduced Interactive Learning, new ways to learn math and science in ChatGPT. |
| Mar 07 | Codex | OpenAI introduced Codex Security, an application security agent that builds deep context about your project to identify complex vulnerabilities that other agentic tools miss, surfacing higher-confidence findings with fixes that meaningfully improve the security of your system while sparing you from the noise of insignificant bugs. |
| Mar 06 | ChatGPT | OpenAI introduced ChatGPT for Excel, ask ChatGPT to build full spreadsheets, get insights across tabs and formulas, and update workbooks in real time so projects move forward faster. |
| Mar 05 | GPT | GPT-5.4 Thinking and GPT-5.4 Pro are rolling out now in ChatGPT. GPT-5.4 is also now available in the API and Codex. GPT-5.4 brings our advances in reasoning, coding, and agentic workflows into one frontier model. See Pricing Here. |
| Mar 04 | Codex | The Codex app is now on Windows. |
| Mar 03 | ChatGPT | GPT‑5.3 Instant Released: Smoother, more useful everyday conversations |
| Feb 17 | ChatGPT | OpenAI introduced Lockdown Mode and Elevated Risk labels in ChatGPT. |
| Feb 12 | Codex | OpenAI released GPT‑5.3‑Codex‑Spark, an ultra-fast model for real-time coding in Codex. |
| Feb 11 | ChatGPT | Deep research in ChatGPT is now powered by GPT-5.2. |
| Feb 05 | Codex | OpenAI introduced GPT‑5.3-Codex, an agentic coding model for long-running coding, research, and computer-based work. |
| Feb 03 | Codex | OpenAI released the Codex app for macOS, a powerful new interface designed to effortlessly manage multiple agents at once, run work in parallel, and collaborate with agents over long-running tasks. |
| Jan 27 | OpenAI | OpenAI introduced Prism, a free, AI-native, cloud-based workspace specifically designed for scientists and researchers to write, collaborate on, and format research papers. |
| Jan 16 | ChatGPT | ChatGPT Go ($8.00/mo) is now available worldwide. It is designed for people who want expanded access to OpenAI’s latest model, GPT‑5.2 Instant, at a lower price point, more messages, more uploads, and more image creation. |
| Jan 15 | ChatGPT | OpenAI released ChatGPT Translate: translate text between dozens of languages instantly. |
| Jan 08 | ChatGPT | OpenAI announced ChatGPT Health, a dedicated experience that securely brings your health information and ChatGPT’s intelligence together to help you feel more informed, prepared, and confident navigating your health. |
2025
| Date | Event | Details |
|---|---|---|
| Dec 20 | ChatGPT | You can now adjust specific characteristics in ChatGPT, like warmth, enthusiasm, and emoji use. |
| Dec 18 | GPT-5.2-Codex | The most advanced agentic coding model yet for complex, real-world software engineering. More Details |
| Dec 17 | ChatGPT | Developers can now submit apps to ChatGPT. More Details |
| Dec 16 | ChatGPT | A new version of ChatGPT Images is now available, powered by the flagship image generation model (GPT Image 1.5). |
| Dec 11 | ChatGPT | New GPT-5.2 model series available: higher performance across reasoning, coding, long context understanding, and vision. Fewer hallucinations. API Pricing |
| Nov 19 | ChatGPT | GPT-5.1 Pro is rolling out today to all Pro users. |
| Nov 13 | ChatGPT | GPT-5.1 Instant & Thinking are rolling out! Blog Post |
| Nov 05 | Sora | OpenAI launches Sora for Android devices. Download |
| Oct 07 | DevDay | Apps in ChatGPT: Chat with apps directly in ChatGPT and build them with the Apps SDK in preview. AgentKit: Build with our toolkit for production-grade agents. Sora 2 in the API: Integrate video generation into your app with our latest Sora model. Codex: Check out new features like a Slack integration, Codex SDK, and enterprise controls in Codex, now generally available. GPT-5 Pro in the API: The smartest model in the API for tasks where precision matters. gpt-realtime-mini: A smaller voice model that’s 70% less expensive than the large model. gpt-image-1-mini: A smaller image generation model that’s 80% less expensive than the large model. |
| Sep 30 | Sora | OpenAI released their latest video generation model, Sora 2. It is more physically accurate, realistic, and more controllable than prior systems. Blog Post |
| Sep 30 | Sora | OpenAI just dropped the Sora iOS app. The “cameo” feature, dropping yourself into a generated video with your likeness and voice, sounds like an entirely new way to communicate with friends. |
| Sep 25 | ChatGPT | OpenAI launches ChatGPT Pulse, a new experience where ChatGPT proactively does research to deliver personalized updates based on your chats, feedback, and connected apps like your calendar. Blog Post |
| Sep 10 | ChatGPT | ChatGPT now supports MCP (Model Context Protocol) tools. |
| Sep 04 | ChatGPT | Projects in ChatGPT are now available to Free users. |
| Aug 07 | GPT-5 | OpenAI finally announced GPT-5, their smartest, fastest, and most useful model yet, with thinking built in. Blog Post |
| Aug 06 | OpenAI | OpenAI just released two new open-weight models, gpt-oss-120b and gpt-oss-20b! They’re designed for serious reasoning tasks and are available under a permissive Apache 2.0 license. Blog Post |
| July 30 | ChatGPT | OpenAI announced study mode in ChatGPT, a learning experience that helps you work through problems step by step instead of just getting an answer. Blog Post |
| July 17 | ChatGPT | OpenAI just launched ChatGPT Agent, which is a new mode in ChatGPT that can actually use its own computer to get tasks done for you. Blog Post |
| July 17 | ChatGPT | Record mode in the ChatGPT macOS desktop app is now available to ChatGPT Plus users globally. |
| June 26 | OpenAI API | Web search is now available with OpenAI o3, o3-pro, and o4-mini. The model can search the web within its chain-of-thought! Learn More |
| June 26 | OpenAI API | Deep research and Webhooks have been added to OpenAI API. |
| June 12 | ChatGPT | OpenAI is adding more capabilities to projects in ChatGPT to help you do more focused work. Deep research support Voice mode support Improved memory to reference past chats in projects Upload files and access the model selector on mobile |
| June 12 | ChatGPT | Canvas now supports downloads! If you’re writing a doc, you can export it as a PDF, docx, or markdown. If you’re using Canvas to write code, it will export directly to the appropriate file type (e.g. .py, .js, .sql, etc.). |
| June 10 | o3 | OpenAI just dropped the price of o3 by 80% |
| June 07 | ChatGPT | ChatGPT just pushed an update to its Advanced Voice Mode for all paid users. It makes talking with the AI feel way more natural. |
| June 06 | ChatGPT | ChatGPT now connects to more of your everyday tools and can even record meetings! This means it can pull in real-time info from your internal sources, like your emails and cloud storage. |
| June 04 | ChatGPT | ChatGPT can now connect to more internal sources & pull in real-time context, keeping existing user-level permissions. |
| June 04 | ChatGPT | Workspace admins can also now build custom deep research connectors using Model Context Protocol (MCP) in beta. |
| June 04 | ChatGPT | OpenAI is rolling out ChatGPT record mode to Team users on macOS. |
| June 04 | CodeX | Codex is rolling out to ChatGPT Plus users today. |
| May 19 | CodeX | Codex is now available in the ChatGPT iOS app! Start new tasks, view diffs, ask for changes, and even push PRs, all on the go. And you can keep tabs on Codex with live activities on your lock screen, or pick things up again when you’re back at your computer. |
| May 16 | CodeX | OpenAI just dropped Codex, an AI software engineering agent that handles tons of coding tasks for you. Blog Post |
| May 14 | ChatGPT | GPT-4.1 will be available directly in ChatGPT starting today. |
| May 09 | ChatGPT | ChatGPT deep research can now connect to YOUR GitHub repos! Get real-time analysis & cited snippets from your code & docs. Available for Team, rolling out to Plus/Pro. Blog Post |
| May 02 | ChatGPT | End of an era! GPT-4 officially retired from ChatGPT on April 30, 2025, replaced by GPT-4o. |
| Apr 28 | ChatGPT | OpenAI is starting to roll out a better shopping experience in ChatGPT search. |
| Apr 23 | gpt-image-1 | OpenAI launched gpt-image-1: their latest and most advanced model for image generation. Now available in the OpenAI API. |
| Apr 16 | o3 & o4 | OpenAI just released o3 and o4-mini, their smartest and most capable models to date. OpenAI o3 is a powerful model across multiple domains, setting a new standard for coding, math, science, and visual reasoning tasks. o4-mini is a remarkably smart model for its speed and cost-efficiency. This allows it to support significantly higher usage limits than o3, making it a strong high-volume, high-throughput option for everyone with questions that benefit from reasoning. Blog Post |
| Apr 15 | GPT-4.1 | OpenAI just announced GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano in the API. The GPT-4.1 family is a major upgrade over GPT-4o for real-world software engineering work. Blog Post |
| Apr 11 | ChatGPT | Memory in ChatGPT can now reference all of your past chats to provide more personalized responses, drawing on your preferences and interests to make it even more helpful for writing, getting advice, learning, and beyond. |
| Apr 11 | BrowseComp | OpenAI announced BrowseComp, a simple and challenging benchmark that measures the ability of AI agents to locate hard-to-find information. Blog Post |
| Mar 28 | GPT‑4o | GPT-4o got another update in ChatGPT with improvements in following detailed instructions (especially multi-request prompts), tackling complex technical and coding problems, intuition, and creativity, along with fewer emojis. Source |
| Mar 27 | MCP | OpenAI adopts rival Anthropic’s standard for connecting AI models to data. Source |
| Mar 26 | GPT‑4o | OpenAI has rolled out a new image generation system directly integrated with GPT-4o. This allows the AI to access its knowledge base and conversation context when creating images. Source |
| Mar 11 | Agent | OpenAI released its first set of building blocks that will help developers and enterprises build useful and reliable agents. Source |
| Feb 28 | GPT-4.5 | OpenAI is releasing a research preview of GPT‑4.5, their largest and best model for chat yet. Source |
| Feb 03 | ChatGPT | OpenAI introduced Deep Research: an agent that uses reasoning to synthesize large amounts of online information and complete multi-step research tasks for you. Available to Pro users today, Plus and Team next. Source |
| Jan 31 | o3 | OpenAI launches o3-mini, its latest ‘reasoning’ model. Free users can now try OpenAI o3-mini in ChatGPT by selecting the Reason button under the message composer. Source |
| Jan 23 | Operator | OpenAI Launched Operator to Automate Tasks. Source |
2024
| Date | Event | Details |
|---|---|---|
| Dec 18 | ChatGPT | You can now talk to ChatGPT via phone call or message ChatGPT via WhatsApp at 1-800-ChatGPT without needing an account. Source |
| Dec 18 | o1 | o1 in the API comes with support for function calling, developer messages, Structured Outputs, and vision capabilities. See the price. |
| Dec 16 | ChatGPT search | ChatGPT search is starting to roll out to all Free users today. |
| Dec 14 | ChatGPT | You can create projects at http://chatgpt.com and on the ChatGPT desktop app for Windows. |
| Dec 13 | ChatGPT | ChatGPT can now see and hear in real-time. |
| Dec 11 | ChatGPT | OpenAI rolls out ChatGPT for iPhone in landmark AI integration with Apple. |
| Dec 10 | ChatGPT | OpenAI expands ChatGPT Canvas to all users. |
| Dec 09 | Sora | Sora (Sora Turbo) is now available! Source |
| Dec 05 | o1 | o1 is now live in ChatGPT now, coming to api soon. Source |
| Dec 05 | ChatGPT | OpenAI announced ChatGPT Pro, a $200 monthly plan that enables scaled access to the best of OpenAI’s models and tools. Source |
| Nov 21 | ChatGPT | GPT-4o model’s creative writing ability has leveled up, with more natural, engaging, and tailored writing to improve relevance & readability. Source |
| Nov 20 | ChatGPT | OpenAI launched Advanced Voice Mode on web! Source |
| Oct 31 | ChatGPT search | ChatGPT search is now available to all users. Source |
| Oct 18 | ChatGPT | OpenAI released ChatGPT desktop app on Windows. Source |
| Oct 12 | Swarm | OpenAI has released a new open-source framework called “Swarm” on GitHub. Swarm is an educational framework exploring ergonomic, lightweight multi-agent orchestration. Source |
| Oct 03 | Canvas | OpenAI released Canvas: a new way of working with ChatGPT to write and code. Source |
| Oct 02 | OpenAI o1 | OpenAI’s expanding access to developers on usage tier 3 and increasing rate limits (to the same limits as GPT-4o) so your apps can be production-ready. Source |
| Oct 02 | GPT-4o | Developers can now fine-tune GPT-4o with images and text to improve vision capabilities. Source |
| Oct 02 | Model Distillation | Fine-tune a cost-efficient model with the outputs of a large frontier model, all on the OpenAI platform. Source |
| Oct 02 | OpenAI API | Prompt Caching is now available. Our models can reuse recently seen input tokens, letting you add even more cached context into our models at a 50% discount and with no effect on latency. Source |
| Oct 02 | Realtime API | Developers can now build fast speech-to-speech experiences into their applications. Source |
| Sep 25 | ChatGPT | Advanced Voice is rolling out to all Plus and Team users in the ChatGPT app over the course of the week. (Source) |
| Sep 13 | o1-preview | OpenAI introduced OpenAI o1-preview, which is the first of their new series of AI models designed to spend more time thinking before they respond. Source |
| Aug 21 | GPT-4o | You can now fine-tune custom versions of GPT-4o to increase performance and accuracy for your applications. Source |
| Aug 07 | Structured Outputs | Model outputs now reliably adhere to developer-supplied JSON Schemas. Source |
| July 31 | Voice Mode | OpenAI is starting to roll out advanced Voice Mode to a small group of ChatGPT Plus users. Source |
| July 25 | SearchGPT | OpenAI announces SearchGPT, a prototype of new search features, using the strength of their AI models to give you fast answers with clear and relevant sources. Join Waitlist |
| July 24 | GPT-4o | Customize GPT-4o mini for your application with fine-tuning. Available today to tier 4 and 5 users, OpenAI plans to gradually expand access to all tiers. First 2M training tokens a day are free, through Sept 23. Source |
| July 18 | GPT-4o | OpenAI announces GPT-4o mini: the most cost-efficient small model. Source |
| July 18 | OpenAI | OpenAI has trained strong language models to produce text that is easy for weak language models to verify and found that this training also made the text easier for humans to evaluate. Source |
| June 27 | CriticGPT | Finding GPT-4’s mistakes with GPT-4. Source |
| May 29 | ChatGPT | GPTs in the Store are now available to all ChatGPT users, allowing more than 100 million weekly active users to experience custom GPTs. Source |
| May 21 | ChatGPT | You can now connect apps to access files in ChatGPT, like docs and spreadsheets. |
| May 16 | ChatGPT | OpenAI introduced enhancements to data analysis. Source |
| May 13 | GPT-4o | OpenAI releases GPT-4o, a faster model that’s free for all ChatGPT users. Source |
| Apr 29 | ChatGPT | The Financial Times today announced a strategic partnership and licensing agreement with OpenAI, a leader in artificial intelligence research and deployment, to enhance ChatGPT with attributed content, help improve its models’ usefulness by incorporating FT journalism, and collaborate on developing new AI products and features for FT readers. Source |
| Apr 28 | ChatGPT | ChatGPT now has memory across chats. Source |
| Apr 27 | Safety | OpenAI introduced the Instruction Hierarchy, the latest safety research to advance robustness for prompt injections and other ways of tricking LLMs into executing unsafe actions. Source |
| Apr 26 | API | Increasing enterprise support with more security features and controls, updates to our Assistants API, and tools to better manage costs. Source |
| Apr 11 | ChatGPT | The new GPT-4 Turbo is now available to paid ChatGPT users. It’s improved capabilities in writing, math, logical reasoning, and coding. Source |
| Apr 10 | ChatGPT | Majorly improved GPT-4 Turbo model available now in the API and rolling out in ChatGPT. Source |
| Apr 05 | ChatGPT | Developers now have more control over fine-tuning and announcing new ways to build custom models with OpenAI. Source |
| Apr 01 | ChatGPT | Starting today, you can use ChatGPT instantly, without needing to sign-up. Source |
| Apr 01 | DALL·E | You can now edit images you create with DALL·E. Source |
| Mar 29 | Voice Engine | OpenAI announced Voice Engine, which uses text input and a single 15-second audio sample to generate natural-sounding speech that closely resembles the original speaker. Source |
| Mar 14 | Figure | OpenAI signed a collaboration agreement with Figure AI to “develop next-generation AI models” for the robots as it believes they can “help in everyday life.” Source |
| Mar 08 | Security | You can now add extra security to your ChatGPT and API accounts by turning on multi-factor authentication. Set it up in account > settings. Source |
| Mar 03 | Read Aloud | Read Aloud allows ChatGPT to read the answers it generates aloud using an AI-generated voice. |
| Feb 24 | ChatGPT Plugins | ChatGPT plugins have been deprecated by OpenAI. Source |
| Feb 15 | Sora | OpenAI introduced Sora, an AI model that can create realistic and imaginative scenes from text instructions. Source |
| Feb 14 | Memory | OpenAI’s testing the ability for ChatGPT to remember things you discuss to make future chats more helpful. You’re in control of ChatGPT’s memory. Source |
| Feb 13 | OpenAI | OpenAI’s revenues have surpassed $2 billion (€1.8 billion) on an annualised basis, as the runaway success of its flagship artificial intelligence product ChatGPT puts it among the fastest-growing technology companies in history. Source |
| Jan 28 | GPT | You can now type @ to mention a Custom GPT and add it directly into your conversation. |
| Jan 26 | GPT | A new preview model for GPT-4 Turbo, gpt-4-turbo-preview, has been introduced. The latest GPT-4 model is intended to reduce cases of “laziness” where the model doesn’t complete a task. Source |
| Jan 26 | GPT | The cost for GPT-3.5 Turbo API access has been reduced, with input prices dropping by 50% to $0.0005 per thousand tokens, and output prices decreasing by 25% to $0.0015 per thousand tokens. Source |
| Jan 26 | GPT | A new GPT-3.5 Turbo model, gpt-3.5-turbo-0125, will be released next week. Source |
| Jan 26 | OpenAI | Open AI introduced two new embedding models: a smaller and highly efficient text-embedding-3-small model, and a larger and more powerful text-embedding-3-large model. Source |
| Jan 16 | OpenAI | OpenAI sets rules to combat election misinformation. It’s been tried before. Source |
| Jan 10 | GPT Store | OpenAI has announced the GPT Store to help you find useful and popular custom versions of ChatGPT. Source |
| Jan 10 | ChatGPT Team | OpenAI is launching a new ChatGPT plan for teams of all sizes, which provides a secure, collaborative workspace to get the most out of ChatGPT at work. Source |
2023
| Date | Event | Details |
|---|---|---|
| Dec 20 | ChatGPT | You can now archive your chats in ChatGPT. Source |
| Nov 30 | OpenAI | Sam Altman returns as CEO, OpenAI has a new initial board. Source |
| Nov 30 | ChatGPT | Happy 1st birthday, ChatGPT! |
| Nov 21 | Voice | ChatGPT with voice is now available to all free users. Source |
| Nov 17 | OpenAI | Chief technology officer Mira Murati appointed interim CEO to lead OpenAI; Sam Altman departs the company. Source |
| Nov 06 | GPTs | OpenAI has introduced GPTs, customizable versions of ChatGPT you can tailor for specific tasks and share. Learn how these new AI assistants work. Source |
| Nov 06 | GPT-4 Turbo | OpenAI Announces GPT-4 Turbo, DALL-E 3 API, Assistants API, and More. Source |
| Oct 19 | DALL-E 3 | DALL·E 3 is now available in ChatGPT Plus and Enterprise. Source |
| Oct 06 | DALL-E 3 | DALL-E 3 Is Now Available In ChatGPT. |
| Sep 27 | Web Search | The web search is back in ChatGPT! Source |
| Sep 25 | Multimodal | OpenAI is on the brink of releasing revolutionary upgrades to ChatGPT, imbuing it with the capability to perceive and interpret voice and images. Source |
| Aug 28 | ChatGPT Enterprise | OpenAI Launches ChatGPT Enterprise: A More Powerful and Secure Version of ChatGPT. Source |
| Aug 22 | GPT-3.5 | OpenAI Opens Up Fine-Tuning for GPT-3.5 Turbo. Source |
| Aug 22 | ChatGPT | Custom Instructions Are Now Available In The EU & UK. Source |
| Aug 08 | GPTBot | OpenAI Deploys Web Crawler GPTBot to Train Next-Generation Language Model GPT-5. Source |
| Aug 03 | ChatGPT | Upload multiple files, suggested prompts and replies, and a whole lot more. OpenAI just released a bevy of updates for ChatGPT. Source |
| Aug 01 | GPT-5 | OpenAI has filed a new trademark application for “GPT-5”. Source |
| July 31 | ChatGPT Android | ChatGPT app for Android is now available in all countries and regions. Source |
| July 27 | ChatGPT Android | The ChatGPT app for Android is now available to users in Argentina, Canada, France, Germany, Indonesia, Ireland, Japan, Mexico, Nigeria, the Philippines, the UK, and South Korea! Source |
| July 25 | ChatGPT Android | ChatGPT for Android is now available for download in the US, India, Bangladesh, and Brazil. Source |
| July 24 | AI Classifier Tool | OpenAI Shutters AI Classifier Tool Amid Low Usage and Accuracy Concerns. Source |
| July 21 | ChatGPT Android | OpenAI Announced ChatGPT for Android. Source |
| July 20 | ChatGPT | OpenAI Introduced Custom Instructions for ChatGPT. Source |
| July 19 | GPT-4 | OpenAI’s doubling the number of messages ChatGPT Plus customers can send to GPT-4. Source |
| July 06 | GPT-4 API | GPT-4 is Now Generally Available: What You Need to Know. Source |
| July 06 | Code Interpreter | Code Interpreter will be available to all ChatGPT Plus users. Source |
| July 04 | Web Browsing | OpenAI Disables ChatGPT’s Web Browsing Feature Due to Misuse. Source |
| June 30 | ChatGPT iOS app | ChatGPT on iOS Gets a Major Update with Bing Integration. Source |
| June 29 | OpenAI | OpenAI Sued for Scraping Private Data to Train ChatGPT. Source |
| June 21 | Credentials Leaked | Over 100,000 ChatGPT Credentials Leaked, Users Urged to Change Passwords. Source |
| June 17 | Mercedes-Benz | Mercedes-Benz Brings Human-Like Chatbot to Vehicles with ChatGPT. Source |
| June 08 | ChatGPT iOS app | OpenAI’s ChatGPT app for iOS has received a major update that includes improved iPad support and integration with Apple Shortcuts. Source |
| June 08 | GPT-5 | OpenAI CEO Sam Altman confirmed on Wednesday that the company is not currently training GPT-5, the successor to its powerful AI language model GPT-4. Source |
| May 30 | ChatGPT iOS app | The ChatGPT iOS app is now available in 152 countries and regions. Source |
| May 25 | OpenAI | OpenAI Threatens to Leave EU Over AI Act. Source |
| May 19 | ChatGPT For iOS | OpenAI has released an official ChatGPT app for iOS. |
| May 16 | OpenAI | OpenAI CEO Calls for New AI Regulatory Agency to Protect Against Misuse. |
| May 13 | Web Browsing | The web browsing feature in ChatGPT was introduced on May 12, 2023. This feature was initially available only to ChatGPT Plus users. |
| May 02 | OpenAI | ChatGPT creator says there’s 50% chance AI ends in ‘doom’. Source |
| Apr 28 | OpenAI | OpenAI closes $300M share sale at $27B-29B valuation. Source |
| Apr 28 | Back In Italy | ChatGPT back in Italy after OpenAI met regulators’ privacy demands. Source |
| Apr 19 | Data Protection | Germany launches data protection inquiry over ChatGPT. Source |
| Apr 19 | OpenAI | OpenAI CEO Sam Altman has said that the era of ever-larger artificial intelligence models is coming to an end, as cost constraints and diminishing returns curb the relentless scaling that has defined the field for years.Source |
| Mar 20 | ChatGPT outage | OpenAI took ChatGPT offline earlier this week due to a bug in an open-source library which allowed some users to see titles from another active user’s chat history. It’s also possible that the first message of a newly-created conversation was visible in someone else’s chat history if both users were active around the same time. Source |
| Mar 23 | ChatGPT Plugins | OpenAI implemented initial support for plugins in ChatGPT. Plugins are tools designed specifically for language models with safety as a core principle, and help ChatGPT access up-to-date information, run computations, or use third-party services. Source |
| Mar 14 | GPT-4 Release | OpenAI announced GPT-4, the latest milestone in OpenAI’s effort in scaling up deep learning. GPT-4 is a large multimodal model (accepting image and text inputs, emitting text outputs) that, while less capable than humans in many real-world scenarios, exhibits human-level performance on various professional and academic benchmarks. Source |
| Mar 01 | ChatGPT and Whisper APIs | Developers can now integrate ChatGPT and Whisper models into their apps and products through our API. Source |
| Feb 07 | Google Bard | Google presents its own AI chatbot called Bard, which is similar to ChatGPT. Google CEO Sundar Pichai says that Bard is more powerful and reliable than ChatGPT, as it draws on information from the web to provide fresh, high-quality responses. Bard is part of a series of tools based on generative artificial intelligence that Google launches to the market at this time. |
| Feb 07 | Bing ChatGPT | Reinventing search with a new AI-powered Microsoft Bing and Edge, your copilot for the web. Source |
| Feb 05 | Anthropic/Claude | Google is investing $300M in an OpenAI challenger that will take on ChatGPT while focusing on A.I. safety. Source |
| Feb 02 | 100 million users | ChatGPT reaches 100 million users two months after launch. Source |
| Feb 01 | ChatGPT Plus | OpenAI launched a pilot subscription plan for ChatGPT. The new subscription plan, ChatGPT Plus, will be available for $20/month. Source |
| Jan 26 | ChatGPT | ChatGPT passes exams from law and business schools. Source |
| Jan 14 | Microsoft | Microsoft in talks to acquire a 49% stake in ChatGPT owner OpenAI. Source |
| Jan 09 | Microsoft | Microsoft is looking at OpenAI’s GPT for Word, Outlook, and PowerPoint. Source |
2022
| Date | Event | Details |
|---|---|---|
| Nov 30 | ChatGPT release | OpenAI released a model called ChatGPT, which interacts in a conversational way. The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests. Source |
| Mar 15 | GPT-3.5 release | OpenAI released GPT-3.5. |
2020
| Date | Event | Details |
|---|---|---|
| June 11 | GPT-3 release | OpenAI released GPT-3. GPT-3 contained even more parameters (around 116 times more than GPT-2), and was a stronger and faster version of its predecessors. |
| June 11 | OpenAI API | OpenAI released an API for accessing new AI models. Source |
2019
| Date | Event | Details |
|---|---|---|
| Nov 05 | GPT-2: 1.5B release | As the final model release of GPT-2’s staged release, OpenAI’s releasing the largest version (1.5B parameters) of GPT-2 along with code and model weights to facilitate detection of outputs of GPT-2 models. Source |
| Aug 20 | GPT-2: 6-month follow-up | OpenAI’s releasing the 774 million parameter GPT-2 language model after the release of our small 124M model in February, staged release of our medium 355M model in May, and subsequent research with partners and the AI community into the model’s potential for misuse and societal benefit. Source |
| July 22 | Microsoft invests in OpenAI | Microsoft invests in and partners with OpenAI to support them building beneficial AGI. Source |
| Feb 14 | GPT-2 Release | OpenAI trained a large-scale unsupervised language model which generates coherent paragraphs of text, achieves state-of-the-art performance on many language modeling benchmarks, and performs rudimentary reading comprehension, machine translation, question answering, and summarization, all without task-specific training. Source |
2018
| Date | Event | Details |
|---|---|---|
| June 11 | GPT Release | Improving language understanding with unsupervised learning. Source |
GPT Model Generations Explained
GPT-1 used generative pre-training to create one model that could handle many language tasks.
GPT-2 made generated text much more visible. Its staged release also put model misuse and release policy into the public conversation.
GPT-3 turned the GPT line into a practical platform. Its few-shot ability made prompt-based writing, coding, summarization, and analysis useful to developers and early AI products.
ChatGPT gave the public a normal chat interface for GPT models. Questions, draft revisions, explanations, and code no longer required developer tools.
GPT-4 raised expectations for accuracy, reasoning, and multimodal input. It also became the model that many paid ChatGPT users associated with serious work.
GPT-4o moved ChatGPT closer to real-time multimodal use. Text, audio, vision, and later image generation became part of the same product direction.
The o-series models put more emphasis on step-by-step reasoning. o1-preview, o3-mini, o3, and o4-mini were built for harder math, science, coding, visual reasoning, and tool-use tasks.
GPT-5 brought earlier model directions into one generation for ChatGPT, the API, and Codex. GPT-5.6 continues that path with Sol, Terra, and Luna tiers. In ChatGPT, the Sol update brings quick answers and deeper reasoning under one model, while Luna gives free users broader access to the GPT-5.6 generation. The Ultrafast preview runs Sol at up to 14 times the speed, and GPT-5.6-Cyber extends the family into specialized cybersecurity work for approved Daybreak Red users.
Major ChatGPT Product Milestones
ChatGPT launched in November 2022 as a public research preview. The product was simple: a chat box, a model, and fast feedback from everyday users.
ChatGPT Plus arrived in February 2023 as the first paid consumer plan. Subscribers received better access during busy periods and earlier access to new features.
Plugins connected ChatGPT with outside tools and services. Later ChatGPT systems incorporated tool use and actions directly.
GPT-4o made multimodal ChatGPT feel more immediate. Voice, vision, faster responses, and later image generation became central parts of the product.
Canvas added a dedicated workspace for writing and coding inside ChatGPT. Drafts and code could be edited outside the message thread.
ChatGPT search brought current web information into the product, with source links for answers that depend on fresh information.
Computer History added an optional source of personal context to the macOS desktop app. It can turn activity across selected apps and websites into memories and a timeline that help ChatGPT and Codex continue recent work.
ChatGPT for Teens added a learning-focused experience for teen users. Study Mode, responsible homework reminders, Quizzes, Learning Visualizations, and Study Hours support active learning, while default age-appropriate safeguards, parental controls, break reminders, and clear AI cues support safer, more balanced use.
Codex made software engineering a separate OpenAI product line. Developers can hand off coding tasks, inspect changes, and work across repositories.
Sora added video and audio generation to OpenAI’s product lineup. Sora 2 improved realism, physics, audio, and control.
ChatGPT Images made image generation and editing part of the ChatGPT workflow. GPT Image 1.5 and ChatGPT Images 2.0 pushed that work toward sharper editing and more usable visual output.
GPT-5.6 Luna extended the current model generation to Free and Go users. OpenAI announced Luna as their default model, with unlimited text chats subject to abuse guardrails and a Think button for questions that need more reasoning.
OpenAI Presence brought voice and chat agents into a managed enterprise deployment product. Companies define each agent’s job, system access, policies, approval requirements, and escalation rules. OpenAI and its deployment partners help test, launch, and improve the agent after it enters production.
OpenAI Daybreak gives approved cybersecurity defenders access to models with safeguards and permissions matched to authorized security work. Daybreak Blue uses general-purpose models such as GPT-5.6 Sol for common defensive tasks, while Daybreak Red includes GPT-5.6-Cyber for advanced vulnerability research, exploit validation, and security testing.
Related Resources:
- Anthropic Claude Timeline
- Google AI & Gemini Timeline
- Meta AI Timeline
- Codex Timeline: Release Dates and Major Updates
- How to use DeepSeek V4 Pro or Flash in Codex and cut API costs
- DeepSeek Timeline: Model Release Dates and Key Milestones
- SpaceXAI Timeline: Grok Release History and Product Milestones
- Qwen Timeline: Model & Product Release History
- What Are The Rate Limits For OpenAI API?
- What Is The Max Token Limit In OpenAI’s GPT Models
- 10 Best ChatGPT Browser Extensions To Upgrade Your Workflow
FAQs
Q: When was ChatGPT released?
A: ChatGPT was released on November 30, 2022, as a public research preview.
Q: What is ChatGPT for Teens?
A: ChatGPT for Teens is a learning-focused ChatGPT experience with Study Mode, responsible homework reminders, Quizzes, Learning Visualizations, and Study Hours. It also applies stronger default protections for users under 18, adds parent controls and healthy-use features, and automatically places users in the experience when OpenAI estimates they are under 18 or they state that they are 13 to 17.
Q: What is the latest general-purpose GPT model?
A: GPT-5.6 Sol is the latest major general-purpose model in this timeline. OpenAI introduced it in limited preview on June 27, 2026, then released a chat-tuned version for Plus and Pro users on August 6.
Q: Is GPT-5.6 available to free ChatGPT users?
A: OpenAI announced GPT-5.6 Luna as the default model for Free and Go users, with unlimited text chats subject to abuse guardrails and a Think button for harder questions. File uploads, images, and other tools have separate limits.
Q: Does ChatGPT Computer History record the screen or audio?
A: No. Computer History records interaction events and creates text summaries. It does not capture the screen or audio. The feature is off by default, and users control which apps and websites contribute.
Q: What is the difference between GPT and ChatGPT?
A: GPT is OpenAI’s model family. ChatGPT is the assistant product that uses GPT and other OpenAI models through chat, search, files, voice, images, and related tools.
