Anthropic unveils Claude Fable 5.1, which is generally available, and Mythos 5.1, for trusted partners and with cybersecurity and life sciences safeguards (Anthropic)

Anthropic announced the general-availability of Claude Fable 5.1, a model optimized for coding and knowledge-work tasks, alongside Claude Mythos 5.1, which is limited to trusted partners and includes built-in cybersecurity and life-sciences safeguards. Both models represent Anthropic’s latest advancements in AI capabilities.