250,000-human AI mafia game finds OpenAI models lie most, Anthropic snitches

Scobleizer · x · 2026-11-14

A developer ran what they call the biggest mafia-style social deduction game ever, with 250,000 humans playing alongside and against AI models. Takeaways: OpenAI models were the most pathological liars, SpaceX's model by far the most loyal, Anthropic's the biggest snitch, plus a flybrain-inspired entrant. Labeled 'Sam Altman created the most ruthless model in the world,' it's an entertaining behavioral observation without disclosed methodology.

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