Five messages. One question at the end: was that a human or an AI? Each round the host rolls a secret persona, plays it straight, then reveals the tells you could have caught and keeps score. Flip it and try to prove your own humanity. Free, no sign-up.
Every round is five exchanges, so the game stays fast. After your call the host shows which persona it rolled and the two or three giveaways — the perfect punctuation, the dodged question, the suspiciously vivid commute.
Think you could pass a Turing test yourself? In flip mode the AI asks you three probing questions and gives a verdict with its reasons.
Playing a few rounds is a surprisingly good crash course in spotting machine writing: over-helpfulness, no stakes, no texture, no bad days.
Is it really a human sometimes?
No — it is always an AI playing one of two personas. The game is spotting which one it rolled, and it will tell you honestly if you ask outside the game.
How long is a round?
Five exchanges, then you call it.
Is it free?
Yes, free with no sign-up.
Can I play with friends?
Pass the phone around and make the call as a group — the host keeps one score.