Anthropic unveils its most advanced AI models for coding, knowledge work

Anthropic has unveiled Claude Fable 5.1 and Mythos 5.1, calling them the world's most advanced models for coding and knowledge work. Fable 5.1 offers up to 45% cost savings on agentic tasks and Enterprise Frontier Safeguards, providing zero-data-retention-level privacy by storing customer data in infrastructure they control entirely. Mythos 5.1 is available through trusted access programmes.