Gemini AI detector for text, documents and pages
Gemini is built into Google Docs, Gmail and Search, so its writing turns up in more places than people expect. Check a passage here to see whether it reads as model-written.
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Your report will appear here
Where Gemini text comes from
Much Gemini writing is produced inside other products: a “Help me write” draft in Google Docs, a suggested reply in Gmail, a summary at the top of a search page. People paste it onward without thinking of it as AI-generated. If a paragraph in a shared document suddenly changes register, it is worth a check.
What it tends to look like
Gemini's default output is heavily structured: a short introduction, bold headings, bulleted lists with a bolded lead-in on every bullet, and a summary to close. When that structure is pasted as plain text, it leaves behind short, parallel sentences and list fragments. The sentence rhythm entry in the patterns list picks up that shape.
Bulleted text is harder for any detector than continuous prose, because there is less language to analyse per line. If you can, check the paragraphs and treat list-heavy results with more caution.
Checking a Google Doc
Download the document as a Word file or PDF (File, then Download) and upload it from the File tab, or copy the text and paste it in. Private Google Docs links cannot be fetched by the URL checker, because they require you to be signed in.
How the AI detector works
An AI detector is a classifier that estimates the probability that text was written by a language model rather than a person. It works by measuring statistical patterns in the writing, not by tracing where the text came from.
Give it something to read
Paste text, drop in a PDF or Word file, or enter the address of a web page. Documents are opened in your browser, so the file itself never leaves your device.
The text is scored
A detection model trained on human writing and on output from AI systems rates the whole text and each sentence for how closely it matches machine writing.
You see the evidence
The report marks every sentence, lists the writing patterns found, and tells you how much confidence the result deserves.
How accurate is AI detection, honestly?
AI detection is accurate enough to raise a question, but not accurate enough to prove an answer. The best detectors catch most unedited AI text with few false alarms, but accuracy drops sharply when text is paraphrased, lightly edited, or written by a non-native English speaker.
Key takeaways
- Accuracy claims of 99% come from the vendors’ own benchmarks.
- One 2026 test of five detectors put the top two at 72% and 74% overall accuracy.
- False positives fall hardest on non-native English writers.
- A score is a probability estimate, not evidence of misconduct.
Reading the score
| Score | Verdict |
|---|---|
| 0–14 | Human-writtenLittle or nothing resembles AI writing. |
| 15–34 | Likely human-writtenMostly reads as a person, with a few AI-like passages. |
| 35–69 | UncertainMixed signals. Not evidence either way. |
| 70–89 | Likely AI-generatedMostly reads as AI, possibly edited by a person. |
| 90–100 | AI-generatedStrong, consistent AI signals throughout. |
A score in the Uncertain range is reported as Mixed when the sentences back that up, with at least 25% of the words in AI-like sentences and at least 25% in human-like ones.
Supported languages: English, French, Spanish, Portuguese, German, Dutch, Polish, Romanian, Italian and Simplified Chinese.
Gemini AI Detector: common questions
Does it detect text from Gemini in Google Docs and Gmail?
Yes. Text written by “Help me write” and similar features is Gemini output and is scored the same way as text from the Gemini app.
Can I paste a Google Docs link?
Only if the document is published to the web. Otherwise download it as .docx or PDF and upload the file.
Does it work on AI Overviews copied from Google Search?
It will score them like any other text, but they are usually short, so expect a low-confidence result.
Is Gemini detection as reliable as ChatGPT detection?
The detection model is trained on output from all the major assistants. Reliability depends more on length and editing than on which model produced the text.