ChatGPT Detector — Spot AI Writing Instantly
Paste any text and see exactly which sentences and words read as ChatGPT-generated. CheckAI scores at the token level, so you get more than a single percentage — you see where the AI signal actually is.
A ChatGPT detector estimates whether text was written by ChatGPT or another AI model. CheckAI scores text at the word and sentence level, so you see exactly which lines read as AI instead of a single percentage. It is free to start with 20 checks daily and detects ChatGPT, Claude, and Gemini.
How to detect ChatGPT text in 3 steps
Paste the text
Drop in an essay, article, email, or message. CheckAI analyzes it instantly — no sign-up wall to get your first result.
Read the token-level heatmap
Instead of one vague percentage, see each sentence and word color-coded by how strongly it reads as AI-written.
Act on the result
Confirm what is human, flag what is AI, and — if it is your own draft — rewrite the risky parts inline and re-check.
Detection that shows where the AI is
A single score tells you little. CheckAI shows you the evidence, sentence by sentence.
Sentence & word-level scoring
See the exact lines driving the AI score, not just an overall number you have to take on faith.
Works across models
Detects text from ChatGPT, Claude, Gemini, Copilot, and other large language models.
Detect, then fix
If the text is your own AI-assisted draft, rewrite flagged sentences and re-check in the same editor.
Private by default
Submitted text is never stored or used for training.
How does a ChatGPT detector work?
AI language models write in statistically predictable ways — they favor high-probability words and produce unusually even sentence rhythm. Detectors look for those patterns. CheckAI goes a step further than a single verdict: it scores each token, so instead of guessing whether a whole passage is AI, you can see which specific sentences carry the strongest AI signal and which read as genuinely human.
Why a single AI percentage is not enough
A lone "78% AI" number is easy to dispute and hard to act on. Was it the introduction, one paraphrased paragraph, or the whole thing? CheckAI replaces that guesswork with a sentence-level heatmap, so reviewers can see the evidence behind the score and writers know exactly what to revise. The same view also makes weak, borderline flags easy to tell apart from strong ones.
Who uses CheckAI to detect AI text
Editors and content teams screening submissions before publishing. Recruiters and hiring managers reviewing written assessments. Educators checking work with line-by-line evidence. And writers who draft with AI and want to confirm their final text reads like a person before it goes out.
ChatGPT detector FAQ
Is the ChatGPT detector accurate?+
No AI detector is perfect, and any tool can produce false positives. CheckAI is built to be transparent about that: instead of one number, it shows token-level evidence so you can judge each sentence for yourself rather than trusting a single percentage blindly.
Can it detect Claude, Gemini, and other AI models?+
Yes. CheckAI detects AI-generated text from ChatGPT, Claude, Gemini, Copilot, and other large language models, not just one provider.
Will it flag human writing as AI?+
All detectors can occasionally flag human text. CheckAI's sentence-level view helps you spot when a flag is weak versus strong, instead of relying on one misleading overall percentage.
Is the ChatGPT detector free?+
Yes. Every account gets 20 free credits daily with no credit card required. Upgrade to Pro or buy a credit pack for heavier use.
Do you store the text I check?+
No. Submitted content is never stored or used for training.
See exactly where AI shows up in any text
Token-level ChatGPT detection, free to start. 20 credits daily, no card required.
Detect AI Text Free