99%
Detection accuracy
See the overall score and passages marked for closer review.
AI Detector for ChatGPT, GPT-5, Claude and Gemini
Check whether text was written by AI. Paste text or upload a file for a free AI score, no signup required.
Add text to start your scan
Paste from your clipboard, upload TXT, PDF or DOCX, or just start typing.
Need an example?
- Paste text or upload a file
- Full-text highlights
- No account needed
- A signal, not proof
From text to evidence
How the AI detector works
See where a signal came from instead of relying on one dramatic percentage.
- 1
Add a meaningful sample
Paste your text, upload a TXT, PDF or DOCX file, or start with a local example.
- 2
Run the detector
The analysis begins only after you choose Scan for AI. Your text is not sent while you type.
- 3
Review highlighted results
Start with the overall AI score, then read AI-like passages highlighted in the full text.
Accuracy
99% accurate, with under 1% false positives
Review the overall AI score and highlighted passages in your original text.
<1%
False positive rate
Check flagged wording against the surrounding text.
Full text
Clear highlights
Read marked passages in their original context.
Method
The document score is only the beginning.
The detector reviews your writing in context and shows an overall AI score alongside highlighted passages.
- 01
Inspect the distribution
A high document signal can contain low-signal passages, and a low document signal can still contain sections worth reviewing.
- 02
Keep uncertainty visible
Short, translated, heavily edited or formulaic writing can be harder to classify. Scores may change as the text changes.
- 03
Use human context
A model score cannot establish authorship, intent or misconduct. Treat it as one input alongside drafts, sources and conversation.
Coverage
Detects GPT-5, Claude, Gemini and mixed drafts
Model names describe the text families this AI content detector is designed to review, not partnerships or guaranteed source attribution.
| Text family | Designed to review | Result |
|---|---|---|
| OpenAI | ChatGPT output from GPT-5, GPT-4o and earlier GPT models | AI score + highlighted text |
| Anthropic | Claude model family | AI score + highlighted text |
| Gemini model family | AI score + highlighted text | |
| Mixed drafts | Human-edited and AI-assisted writing | Different signals highlighted in context |
Use cases
Who uses an AI checker
Anyone reviewing writing they did not watch being written. The common thread is care: the score opens a conversation instead of ending one.
Education
Identify passages worth discussing while keeping drafts, sources and student context in the decision.
Editorial review
Review contributed drafts and focus on changes in the writing.
Publishing
Add a measured authorship signal to an existing review workflow without treating it as proof.
Personal writing
See how revisions change the signal before sharing work with a client, teacher or editor.
Developers
The same AI detection, over an API
Everything the workbench does is available programmatically. Score documents from your own pipeline with the AI detector API, or connect the MCP server so your agents can check text for AI patterns mid-conversation.
Before you trust a score
AI detector questions, answered
Straight answers about what an AI detector can and cannot do. Knowing the difference is what makes a score worth using.
How does the AI detector work?
Paste or upload your text to receive an overall AI score and highlighted passages you can review in context.
How accurate is the AI detector?
The detector reports 99% accuracy and a false positive rate under 1%. Longer, coherent samples provide more context than short or heavily edited text.
Why was my own writing flagged as AI?
It happens, and it does not mean you did anything wrong. Formulaic structure, stock phrasing and very uniform sentence rhythm can resemble model output, especially in short samples. Open the highlights, revise the sentences that read like boilerplate, and scan again. The detector responds to the writing, not the writer.
Can a detector prove who wrote a document?
No. AI detection is a probabilistic review signal, not proof of authorship or misconduct. Consider drafts, citations, writing history and the surrounding context before making a decision.
What makes a useful sample?
Longer, coherent samples generally give the detector more useful context than isolated sentences. Short or heavily edited passages can carry more uncertainty.
What files can I upload?
You can upload TXT, PDF and DOCX files. PDF and DOCX text is read privately in your browser only after you choose a file, so document parsers do not slow the initial page load. Scanned PDFs need OCR and are not supported yet.
Which AI models can it check?
The detector is designed to review patterns commonly found in text from GPT, Claude and Gemini model families, including edited or mixed drafts. It does not identify a specific generator with certainty.
Which languages does it support?
Check text in its original language and review the score alongside the highlighted passages.
Why might a score change after a small edit?
Changes to wording, rhythm, punctuation or structure can change the score and highlighted passages.
What is the best AI detector?
Look for a detector that shows the original text, clear highlights and an overall score you can review. Detecting AI offers free scans with no signup.
Free text check
Start with your text and review the highlights.
Try the detectorFree scans need no account. If a flagged draft needs work, you can humanize AI text and review every edit before it ships.