Anthropic says Fable 5.1 sets new standards on coding, knowledge work, and long-running problem-solving tasks, and can fix the root causes of software issues (Carl Franzen/VentureBeat)

Anthropic announced the general-availability launch of Claude Fable 5.1 and the partner-only Claude Mythos 5.1, which it touts as the most advanced models for coding, knowledge work, and long-running problem-solving, capable of identifying and fixing root causes of software issues. Mythos 5.1 includes additional cybersecurity and life-sciences safeguards for trusted partners.