Anthropic launches Claude Fable 5.2 and Mythos 5.2, claims solved open physics problems

The Verge AI · rss · 2026-11-10

Anthropic has announced two new models, Claude Fable 5.2 and Claude Mythos 5.2, pitched at tackling "daunting" technical challenges. The company claims improvements in coding, reasoning, and vision over the 5.1 versions, along with faster output generation.

Claude Fable 5.2 targets hard software engineering problems, can orchestrate agent teams, and handle long-running projects. Anthropic also says the models solved complex scientific problems during prerelease testing, including two open theoretical physics problems.

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