ChatGPT Detector
Wondering if something was written by ChatGPT? Paste the text below to get an instant likelihood score and see which sentences show the strongest AI signals.
This ChatGPT detector looks for the patterns large language models tend to produce — uniform sentence rhythm, predictable phrasing, and low variation (how detection works). It works on output from ChatGPT and other models alike.
Sentence-level highlights
See the exact lines that read as AI.
Every major model
ChatGPT, Claude, Gemini — not just one.
Instant & free
No sign-up. Same text, same score.
Honest by design
A probability, never a false verdict.
Frequently asked questions
Can this detect text written by ChatGPT?+
Yes. It estimates how likely text was AI-generated based on writing patterns common to ChatGPT and similar models, returning a 0–100 score with highlighted sentences.
Does it work on GPT-4 and GPT-5 text?+
It targets general AI writing patterns rather than a specific version, so it applies to newer ChatGPT models. Newer models are harder to detect, so scores are a signal, not proof.
Can teachers prove I used ChatGPT with this?+
No. A detector score is not proof. It can produce false positives on human writing, so it should never be the sole basis for an academic accusation.
⚠️ Disclaimer: AI Killer results are probabilistic signals and are not 100% accurate. Detectors can flag human writing as AI, so do not use this as the sole basis for accusations of plagiarism, cheating, or academic misconduct.