Mythos 5.1
1 article tagged with Mythos 5.1
September 1, 2026
model releaseAnthropic
Anthropic Releases Claude Fable 5.1, Cuts Agentic Workload Pricing Up to 45%
Anthropic has released Claude Fable 5.1, an upgrade to its top-tier Fable 5 model launched in June, alongside a restricted-access sibling called Mythos 5.1. The company claims the new model matches or beats Fable 5's performance while cutting costs by up to 45% on agentic workloads through reduced cache-read pricing.