Anthropic launches new Claude Fable and Mythos 5.2 models

What happened: Anthropic announced two new models, Claude Fable 5.2 and Claude Mythos 5.2, which it says are built for "daunting" technical challenges. Why it matters: Anthropic claims the models improve on coding, reasoning, and vision and generate outputs faster than the 5.1 versions, with Fable 5.2 able to orchestrate agent teams and handle long-running projects. Key numbers: Anthropic says Fable 5.2 solved two open theoretical physics problems during prerelease testing.

Anthropic announced two new models, Claude Fable 5.2 and Claude Mythos 5.2, which it says are built for "daunting" technical challenges.

Anthropic claims the models improve on coding, reasoning, and vision and generate outputs faster than the 5.1 versions, with Fable 5.2 able to orchestrate agent teams and handle long-running projects. Key numbers: Anthropic says Fable 5.2 solved two open theoretical physics problems during prerelease testing.