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Developing story · 2 episodes · 23 Oct to 24 Oct

Claude Opus 5.5 Reasoning Restrictions

Users of Anthropic's Claude Opus 5.5 are experiencing technical failures and content restrictions when attempting to probe the model's internal reasoning processes. The situation remains unresolved as the system continues to reject disabled thinking requests and truncate outputs related to reverse-engineering.

  1. Generative AI & Modelsnew

    Claude Opus 5.5 users report cutoffs on reverse-engineering prompts

    Users on Reddit and X say Anthropic's Claude Opus 5.5 now stops mid-response when asked to reverse-engineer software, a capability linked to recent AI-assisted game decompilations. The reports began…

    1 source
  2. Generative AI & Modelsnew

    Anthropic Claude Opus 5.5 rejects disabled thinking, causing 400 errors

    Anthropic has released Claude Opus 5.5, Fable 5.1, and Sonnet 5.5, introducing breaking changes to the API that may disrupt existing automation. The most significant change is that Claude Opus 5.5…

    1 source
Who and what
AnthropicOpenAIGitHubNousResearchKotakuMega CritTake-TwoXboxGoogleClaude Opus 5.5Fable 5.1Sonnet 5.5
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