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Chess match: Opus 5.5 vs GPT 6 Astra. Astra won

I set up a chess game between two agents on a board in Persephone , my free, open-source (MIT) notepad for Windows with a built-in MCP server. Both models ran at high effort in fresh sessions . Neither was allowed a chess engine, a script or the web, only its own thinking and the board. Model Effor…

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Timeline · 1 report

  1. 2026-10-07 05:33 · r/ClaudeAI
    Chess match: Opus 5.5 vs GPT 6 Astra. Astra won

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