Model guide
Gemini AI Detector
Check English text from Gemini for AI-writing signals with our free checker. Paste at least 100 words to get a score from 1 to 99 and a result to help you review the passage. No account is required. The checker assesses the writing; it cannot confirm that Gemini was used or identify who wrote it. Check your text
The tool below is the same detector as on the homepage.
English · 100+ wordsengine v4
Paste text to check
V4 is a fine-tuned transformer text classifier that reads your text in overlapping windows. The score follows a fixed map; scores of 65 or more are treated as AI-written at every length. How it works →
Can a Gemini AI detector tell if Gemini wrote a text?
A text detector can look for patterns associated with AI-generated writing, but this checker cannot identify Gemini as the source. Text from Gemini, ChatGPT, Claude and other assistants can share similar features, and human writing can share some of those features too.
That distinction matters when you use the result. For your own draft, a high score can be a reason to take another look at the wording. It is not a record of which application was used, which Gemini model generated it, or how much a person contributed. AI Detector Checker is an independent service, not a Google product.
How to check Gemini text in five steps
- Choose the passage you want to review. Use your own writing or text you have the writer’s informed consent to check. Keep a copy of the original so you can distinguish later edits from the version you analysed.
- Paste at least 100 words of English. Use a coherent passage. Leave out the prompt, email headers, signatures and quoted replies if they are not part of the writing you want assessed. Keep the passage’s wording intact.
- Select Check text. The result applies to the text in the box as a whole. If the checker asks for more text or reports a limit, address that message before interpreting any result.
- Read the score and result label together. Check the stability range as well. The three labels are Likely human-written, Uncertain and Likely AI-written; their meaning is explained below.
- Review the writing itself. Check factual claims, source references and whether the draft says what you intended. For questions about the writing process, use the original draft, notes and available version history.
To compare drafts, use Compare up to 3 passages. Put each passage in its own box rather than joining unrelated texts into one submission. Keep a note of which version each result belongs to; a change in score does not, by itself, measure an improvement in writing quality.
If your text is too short or the check will not run
For an email under 100 words, do not add filler or combine messages from different writers to reach the minimum. Use a longer, continuous passage only if it exists and is appropriate to review. Otherwise, review the short message without a detector result.
The current upper limit is 50,000 characters. For a longer document, choose coherent sections within that limit and treat each result as applying only to its submitted section. If the service asks you to wait, follow its retry message. Text in other languages may produce a result, but that result is unsupported; see our language guidance.
How to read a Gemini detector result
The checker uses a 1–99 AI-writing signal scale. The result label follows the score:
| Score | Result label | How to use it |
|---|---|---|
| 1–34 | Likely human-written | The score is in the lower signal range. It does not establish that the text was written without AI assistance. |
| 35–64 | Uncertain | The result does not support a clear classification. Return to the text and its context rather than forcing a yes-or-no answer. |
| 65–99 | Likely AI-written | The score meets the checker’s AI-signal threshold. Review the passage; the label does not establish its author or source model. |
Within the AI range, 65–84 carries a Moderate signal label and 85–99 a Strong signal label. A score of 80 does not mean that 80% of the words came from Gemini, or that there is an 80% probability Gemini wrote the text.
The stability range describes variation in the displayed score under the mapping procedure described in our methodology. It is not an authorship confidence interval. A narrow range does not make a classification correct, and the range’s endpoints do not change the result label.
The result covers the whole submitted passage. This checker does not highlight individual AI-written sentences. Any writing-pattern observations on the card should not be treated as a list of sentences responsible for the score. Our guide to understanding results explains the card in more detail.
Checking text from Gemini, Google Docs and Gmail
Gemini can produce a new draft or help revise something you wrote. Google documents drafting and editing features in Google Docs and Gmail. Availability depends on your account and plan. A finished document may therefore combine original writing, generated passages and later edits. Its location in a Google app does not tell you which of those processes occurred.
Text copied from the Gemini app
Copy the answer you want to examine, without your prompt or the surrounding conversation. If you already know Gemini produced it, that known history remains relevant even if the checker returns a low score. The result cannot erase the information you have about where the text came from.
Drafts in Docs or Gmail
In Docs, select the passage you want to review and keep the document’s editing history alongside it. Google explains how to open version history and inspect changes; access to earlier versions requires edit permission. A history of changes can provide context, but a pasted block alone does not reveal where it was written.
In Gmail, copy the message body you wrote, leaving out quoted conversation and signatures. Many emails will fall below the checker’s 100-word minimum. For those, review the wording and the drafting process directly. Do not expand the email solely to obtain a score.
When you revise a Gemini-assisted draft, save both versions if you want to compare them. This makes your edits visible. It does not make the difference between two detector scores a measure of how many words were written by a person.
What this Gemini AI checker measures
The tool classifies the submitted text for AI-writing signals. It does not connect to your Google account, retrieve your Gemini conversation or inspect a document’s editing history. You provide that context separately.
It also does not search publication databases for matching passages or verify the facts in a draft. Those are different tasks: a passage can have a low AI score and still contain copied wording or an incorrect claim. See AI detection versus plagiarism checking for the distinction.
Is this the same as Google’s Gemini verification or SynthID?
No. This page checks text for writing patterns. Google’s verification tools look for other evidence about how content was produced.
Google DeepMind says SynthID includes watermarking for text generated in the Gemini app and web experience. A text watermark is introduced during generation; a compatible detector looks for that signal. It is different from estimating whether prose resembles AI writing. This checker does not read SynthID watermarks.
Google’s current Gemini verification instructions cover images, videos and audio, using SynthID and, where supported, Content Credentials. That documented media workflow is not a general authorship check for pasted essays or emails. If you are checking a photo or video, use Google’s relevant verification workflow rather than this text box.
A missing watermark does not establish human authorship. Google’s SynthID Text documentation also describes probabilistic detection and limitations after substantial rewriting or translation.
How reliable is Gemini text detection?
There is no accuracy percentage that can tell you whether a particular Gemini draft will be classified correctly. A performance claim needs a defined detector version, set of texts, generation conditions and error measure. Results on one collection do not establish performance on every email, edited document or future model release.
The 2024 RAID benchmark study found that detector performance could change with unfamiliar models, generation settings and modifications to text. That research explains why the conditions matter; it is not a measurement of this checker’s current performance.
For your draft, two errors remain possible: human writing can receive an AI label, and AI-generated writing can receive a human label. A strong score cannot rule out the first error, and a low score cannot rule out the second. Use the result within its limited purpose rather than as a certificate of origin.
Two examples of what to do after a check
The following situations are hypothetical illustrations, not tests of the detector.
A Gemini-assisted product description gets a low score
You ask Gemini for a product description, correct the specifications and rewrite the opening. The finished passage receives a low AI-writing score. Your saved draft still documents that Gemini helped produce it. The useful next step is to verify every product claim and follow any disclosure requirements that apply to your work, not to describe the score as proof that no AI was involved.
Your own article gets a high score
You write an article from your notes and receive an AI label. Keep the original, your notes and the result. Re-read the draft for unclear claims or weak sourcing because those affect its quality, not because changing them is guaranteed to reduce the score. If you need to explain your writing process, use those records. The checker cannot reconstruct that process from the final prose.
Edited Gemini text and false positives
A rewritten or translated draft is a different input. Its score may change, but there is no reliable rule that editing must lower it. A low result on text known to come from Gemini can be a false negative; it does not justify assuming that someone secretly edited the passage.
Likewise, polished phrasing, regular sentence structure or formal vocabulary do not establish AI use. Research published in Patterns in 2023 documented false positives affecting non-native English writing in the detectors studied. Those findings are a reason to take context seriously, not a current error rate for this tool.
If your own writing is flagged, preserve your drafts and sources before making changes. Our guide to handling an AI flag offers further steps. Improve the text for accuracy, clarity and the reader’s needs; repeatedly rewriting to chase a lower number does not establish authorship.
Use the checker for permitted text review
Use the service for reviewing your own text or for editorial review with the writer’s informed consent. Our terms prohibit using its output to make, support or trigger academic, employment, disciplinary or other high-impact decisions about a person. Adding a human review does not turn a prohibited use into a permitted one.
For an ordinary drafting workflow, the useful questions are concrete: Are the claims correct? Are sources acknowledged? Does the draft explain what the reader needs? Can you account for the assistance used? A detector score does not answer those questions for you.
Gemini AI detector FAQ
Is this Gemini AI detector free?
Yes. The public checker is currently free and does not require an account. It accepts English passages of at least 100 words, up to the current 50,000-character limit. Free access does not mean unlimited requests; follow any limit or retry message shown by the service.
Does Gemini have its own AI detector?
Google offers verification features in Gemini for supported images, videos and audio, and develops SynthID watermarking technology, including for text. Those are distinct from this independent text checker. Use the Google workflow appropriate to your content type; do not treat a chatbot’s opinion about a pasted paragraph as verified authorship.
Does it guarantee detection of the latest Gemini models?
No. The ability to submit a passage is not a guarantee of accurate detection for its source model. A model name or recent release date does not tell you how this checker will classify an individual response.
Can it distinguish Gemini Pro from Flash?
No. The checker does not identify model names, tiers or versions. A result cannot tell you whether a passage came from Pro, Flash, another Gemini model or a different assistant.
Does a Gemini thinking setting change the result?
This checker analyses the final text you submit, not the model’s internal reasoning or generation settings. Its result does not establish which thinking setting was used, and it provides no setting-specific reliability guarantee.
Can I check text drafted or rewritten in Google Docs or Gmail?
Yes, if you have the right to submit it and it meets the English-language and length requirements. Copy the passage itself. The checker receives that text, not the document history, and it cannot separate your contribution from Gemini’s contribution.
Can human writing be flagged as AI?
Yes. A human-written passage can receive an AI label. If that happens to your own text, keep the original and your writing records. Review genuine problems in the draft, but do not treat a lower score after revision as proof of authorship.
Does it support Gemini text in other languages?
No. This checker supports English only. Another language may be accepted by the input box, but its result is unsupported. Translating a passage into English does not validate a result for the original text; the translation is a different input.
What happens to the text I submit?
Text is sent to the service’s servers and analysis backend. The privacy policy states that submitted text is not retained, while limited operational metadata may be logged; it also explains infrastructure and retention limitations. No account is required, but that does not make a request anonymous. Do not submit sensitive or confidential material.
Will a low score mean my text will pass another AI detector?
No. Different tools can use different models, thresholds and definitions of a score. A low result here does not predict another service’s result or certify compliance with a school, publisher or employer’s rules.
Other AI model guides
If your question concerns a different assistant, see our ChatGPT detector guide, Claude detector guide or all model guides. The same underlying checker is used across these pages; choosing a guide does not activate a model-identification test.
Make the next step a useful review
For your own English draft, start with one coherent passage of at least 100 words and run a check. Read the result, then return to the facts, sources and editing decisions that make the writing useful. If the score conflicts with what you know about the draft, keep that history and work from it rather than trying to make the number tell a different story.