Free GPT Killer
A GPT killer catches text written by ChatGPT, GPT, and other AI models. Paste it below to instantly see the AI likelihood as a 0–100 score, a visual graph, and sentence-level highlights.
AI Killer's GPT killer is completely free, needs no account, and has no daily check limit (how detection works).
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
What is a GPT killer?+
A GPT killer estimates how likely a piece of text was generated by ChatGPT or another GPT model. It analyzes writing patterns and shows a 0–100 score, a proportion graph, and sentence-level highlights.
Is the GPT killer free and unlimited?+
Yes. AI Killer's GPT killer is completely free, requires no account, and has no daily limit on checks. Paste your text and check instantly.
Is any GPT killer 100% accurate?+
No. GPT killers are probabilistic and can both flag human writing and miss AI text, especially on short passages. Use the result as a signal, never as the sole basis for a decision.
⚠️ 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.