Introducing Claude Fable 5.1 and Claude Mythos 5.1
We’re introducing Claude Fable 5.1 and Claude Mythos 5.1. They’re the world’s most advanced models for coding and knowledge work—and their research capabilities offer an early glimpse of how AI models will contribute to scientific progress.

TL;DR
- Introduction of Claude Fable 5.1 and Claude Mythos 5.1.
- These models are described as the world's most advanced for coding and knowledge work.
- Their research capabilities offer a glimpse into AI's contribution to scientific progress.