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Is Opus 5.5 entering a “nerfed” phase? LiveNerf baseline update

A few days ago, I released an open-source project that gives the Claude community a way to independently measure whether Opus 5.5’s performance changes or gets “nerfed” in the weeks following its release. It tracks performance day by day using established benchmarks such as SWE-bench and SciCode, a…

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  1. 2026-09-29 20:51 · r/ClaudeAI
    Is Opus 5.5 entering a “nerfed” phase? LiveNerf baseline update

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