Claude Opus 5.5 spotted on Anthropic’s website, Tuesday release looking more likely

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Summary

Claude Opus 5.5 has been spotted on Anthropic's website, suggesting an imminent release, possibly on Tuesday.

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Anthropic tests its next model under Claude Opus 5.5 (3 minute read)

TLDR AI

Anthropic appears to be quietly testing a new model checkpoint routed under Claude Opus 5.5, with users on X reporting SOTA-quality outputs including long-horizon Blender MCP 3D scene generation and complex coded animations, speculating it may be Opus 5.6 or Fable 5.5.