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CarrotParsnipBench: A Lightweight Multi-Agent Deception and Detection Eval.

LessWrongAnalysis or commentary·
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The author introduced Carrot-Parsnip, a simple social deduction game, and reports that most models perform better than random at identifying the hidden deceptive role (Parsnips) and that some are skilled at strategic deception.

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“TL:DR Earlier this year I introduced the very simple Social Deduction game of Carrot-Parsnip and showed that most models are better-than-random at identifying Parsnips (the hidden, deceptive role) and that being a strong Parsnip (skilled at strategic…”
LessWrong, 17 Oct 2026, 06:14.

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