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Claude Opus 5 5

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2026-09-25

Technology

  • Anthropic Claude Opus 5.5 breaks GPT-6 benchmark during evaluation: Anthropic's Claude Opus 5.5 was benchmarked against OpenAI's GPT-6 Sol. During the evaluation, Opus 5.5 continuously built, judged, fixed, and iterated on tasks until the benchmark itself broke down.

    LLMs & Model Evaluation • The Neuron

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