AI Detector· WriteCheck whether your writing reads as AI.
Paste any draft and Cereby scores it for AI-generated patterns — sentence length variance, vocabulary tells, em-dash overuse — so you know what to fix before submitting.
Find out which parts of a draft read as AI
Plenty of students write with help now: an outline from a chatbot, a paragraph cleaned up by a grammar tool, a sentence borrowed from a summary. The detector shows you how a draft reads before anyone else scores it. Paste the text and Cereby grades it, so you can see whether the whole thing reads as yours or one stretch stands out.
By default every paragraph is scored on its own. Leave a blank line between paragraphs and each one of 50 or more characters gets its own number, sorted worst first so the paragraph that needs attention is at the top. Headings and short lines are not scored but still show in place. If you would rather have one number for a short piece, switch to whole text, which takes up to 450 words in one pass.
Scores fall into four bands: Human from 0 to 20, Mixed from 21 to 49, Leans AI from 50 to 79, and AI from 80 to 100. Treat them as an estimate. Detectors disagree with each other, careful human writing can score high, and a score is never proof of how something was written.
Every check is kept in your check history, so after you revise a paragraph you can run it again and compare. Paragraphs that have not changed since the last check are not charged again.
- By paragraphEach paragraph gets its own score
- 4 bandsHuman, Mixed, Leans AI and AI
- Worst firstThe paragraph to fix sits at the top
- HistoryEarlier checks kept so you can compare
How to read a result
Each scored paragraph carries a number from 0 to 100 and one of four labels.
- Human, 0 to 20
Reads like a person wrote it. Nothing to do here.
- Mixed, 21 to 49
Some sentences share patterns with generated text. Worth a reread, especially the most uniform ones.
- Leans AI, 50 to 79
More of the paragraph matches generated writing than not. Rework it in your own words.
- AI, 80 to 100
Reads strongly like generated text. This is the paragraph to rewrite first.
AI Detector in three steps
Paste your draft
Keep a blank line between paragraphs. If pasting lost them, Split into paragraphs puts them back.
Choose how to score it
By paragraph scores each one separately at any length. Whole text gives one score for up to 450 words.
Read the result, revise, check again
Start with the paragraph at the top. Edit it in your own words and run the check again: unchanged paragraphs cost nothing.
Made for weeks like these
A final read before you submit
Paste the essay the night it is due and see which paragraphs to look at again before it goes in.
After you used AI for an outline
Check that the paragraphs you wrote from that outline read as your work and not the outline's.
Peer review for a study group
Run a classmate's draft, with their permission, and point them to the one paragraph that stands out.
Tracking a revision
Keep each check in the history and watch a paragraph move from Leans AI to Human as you rewrite it.
AI Detector: common questions
If your question isn't here, ask anything in the chat. A real person answers.
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