Robot(Claude or ChatGPT) or Meatbag?

Paste something you wrote. Or something a robot wrote. Let's find out which.

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It runs entirely in your browser. Nothing you paste goes anywhere.

It knows two robots: Claude Opus 5 and ChatGPT. Every other AI may read as a meatbag to it, so a low score proves nothing. It is a toy, not evidence. Please do not accuse anyone of anything.

How it works, and where it falls over →