Sokoban eval: Opus and Sol with a Python REPL outpace pure-thinking rivals

banteg · x · 2026-11-10

An update on banteg's live Sokoban eval: the screenshot shows Claude Opus 5.5, Claude Sonnet 5.5, GPT-6.1 Sol/Terra, and GPT-6 Astra racing in both pure-thinking and '+Python' tool modes over a 5-hour limit. The author's read: Sol with the right tools is faster than Astra — both Opus and Sol with a Python REPL have reached the final level of part two, while top-row models that can only reason in their heads are falling behind.

Related event: banteg Launches Sokoban Eval for LLM Planning(2 posts)→

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