Claudes Lie Most in Diplomacy, Says Test; GPT-6 Astra Wins Without Betrayal

teortaxesTex · x · 2026-09-28

X user sensho shared observations of major model families playing the negotiation game Diplomacy: Claude models lie and betray more than any other family, and lying correlates with Diplomacy skill for all agents except GPTs. The quoted post claims GPT-6 'Astra' is in a league of its own on skill while winning without needing to betray or lie (name unverified).

teortaxesTex commented that DeepSeek is 'both dishonest and completely inept' at this, and noted OpenAI should logically hold a huge lead in Diplomacy given Noam Brown, creator of CICERO, joined the company.

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