Anthropic releases Mythos 5.2 and Fable 5.2, saying they are "best for the most ambitious, open-ended technical work", with outputs up to 30% faster than 5.1 (Anthropic)

Anthropic:
Anthropic releases Mythos 5.2 and Fable 5.2, saying they are “best for the most ambitious, open-ended technical work”, with outputs up to 30% faster than 5.1  —  We've upgraded Claude Fable and Claude Mythos—models that are designed to tackle the most daunting technical challenges.