AI Detector is a free and fast AI content detection tool that identifies text generated by ChatGPT, Claude, Gemini, and other AI models with 95%+ accuracy.
This tool uses a multi-algorithm analysis system to examine text patterns and provides instant results without any cost or user registration.
Features
- Multi-Algorithm Detection System: Combines results from 10+ detection algorithms to analyze linguistic patterns, structural markers, and stylistic signatures characteristic of AI content.
- Instant Analysis: Processes text immediately after submission and provides results within seconds.
- Sentence-Level Analysis: Breaks down results to show which specific parts of the submitted text trigger AI detection patterns.
- Universal AI Model Detection: Identifies content from ChatGPT, Claude, Gemini, Grok, and other language models by analyzing universal AI patterns rather than model-specific signatures.
- Complete Privacy: Processes text in real-time without storing, logging, or sharing submitted content with third parties.
- Text Length Flexibility: Accepts minimum 50 words for analysis, with optimal accuracy achieved at 150+ words to allow pattern analysis across multiple sentences and paragraphs.
Case Study
I tested the tool using an article generated by ChatGPT that was then processed through AI Text Humanizer, the same content used in writing an article about the 7 best free AI content detectors. The analysis returned a score of 23% with the verdict “Probably Human-Written.”
The detection breakdown showed three key factors. Pattern Analysis identified consistent sentence patterns and contributed +10 to the AI score. Complexity Analysis detected consistent complexity patterns adding +8 points. Format Analysis found consistent paragraph lengths contributing +5 points.
Comparing results across multiple AI detectors tested in that research, this tool ranked third in accuracy behind Originality.ai and GPTZero. The detector successfully identified some AI characteristics in the humanized text that other tools missed, though the overall score suggested the humanization process reduced some AI markers.
How To Use It
1. Visit the AI Detector website and paste the text you want analyzed.
2. Click the “Analyze Text” button, and the AI analyzes your submission immediately using its multi-algorithm system.
3. Review the instant results displayed on screen. The system provides an overall percentage score indicating AI probability, along with a verdict such as “Probably Human-Written” or “Likely AI-Generated.”
4. Examine the detailed detection factors breakdown. The tool shows specific elements like Pattern Analysis, Length Distribution, Complexity Analysis, and Format Analysis, each with corresponding point values explaining how they influenced the final score.
For example, when I tested an article generated using GPT-5.1, the tool returned a 36% score with the verdict “Probably Human-Written.”
The breakdown showed Pattern Analysis at +10 points for consistent sentence patterns, Length Distribution at +8 points for narrow sentence length range, Complexity Analysis at +8 points for consistent complexity patterns, and Format Analysis at +10 points for highly uniform paragraph structure.
This granular feedback helps users understand which specific text characteristics are flagged as potentially AI-generated.
Pros
- No cost: Completely free without hidden charges or usage limits.
- Privacy focused: Zero data retention policy protects your content.
- Instant results: Processes text within seconds without queues.
- Detailed analysis: Provides specific factors influencing the detection score.
- Multi-model detection: Identifies content from all major AI systems.
Cons
- No rewriting suggestions: It doesn’t offer humanization tips.
- Minimum word requirement: Needs at least 50 words for basic analysis.
- Accuracy varies: Less reliable with very short or heavily edited AI content.
Related Resources
- OpenAI’s Guide to AI Text: Educator FAQ regarding AI text detection
- Google Search Central: Google’s guidance on AI-generated content
Frequently Asked Questions
Q: How accurate is the AI detector?
A: The tool claims 95%+ accuracy by combining over 10 different detection algorithms. In practice, accuracy depends heavily on the input length. It looks for linguistic patterns and stylistic signatures. It is generally reliable for raw AI text but, like all detectors, can struggle with heavily edited or “humanized” content.
Q: Which AI writing tools can it detect?
A: It works on content from all major models, including ChatGPT, Claude, Gemini, and Grok. Since it analyzes universal patterns (like sentence uniformity) rather than model-specific signatures, it can flag text from new models as well.
Q: Is my text data safe and private?
A: Yes. The tool processes content in real-time and discards it immediately. It does not store, log, or share your text with third parties.
Q: Can it detect AI-assisted or edited content?
A: Yes, to an extent. The sentence-level analysis is designed to catch “mixed” content. If a writer uses AI for two paragraphs and writes the rest themselves, the detector’s pattern analysis often spikes for those specific sections.
Q: How much text do I need for accurate detection?
A: The minimum submission length is 50 words, though 150+ words provides optimal accuracy. The algorithms analyze patterns across multiple sentences and paragraphs, so more text means more data points for confident detection.
