POPA ReconAnthropic Launches Claude Fable 5.1 and Mythos 5.1, Its Most Advanced Models Yet
Anthropic Launches Claude Fable 5.1 and Mythos 5.1, Its Most Advanced Models Yet Anthropic released Claude Fable 5.1 and Mythos 5.1, calling them the world's most advanced models for coding and knowledge work. Fable 5.1 is generally available, while Mythos 5.1 ships through trusted-access programs with safeguards built for cybersecurity and the life sciences. Fable 5.1 costs about 25% less than Fable 5 for typical token-billed workloads, with heavily agentic tasks saving up to roughly 45%, driven by cheaper cache reads. It also debuts Enterprise Frontier Safeguards, giving enterprises zero-d…
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