Claude Fable 5.1: Anthropic Cuts Agent Costs 45%

Anthropic has released Claude Fable 5.1 and Mythos 5.1, making complex agentic tasks up to 45% cheaper. This update directly addresses customer concerns about pricing. The new models offer cost reductions of about 25% on typical workloads and up to 45% for complex tasks. These savings come primarily from cheaper pricing on cached data, meaning previously processed information doesn't cost full price each time it's used. This is significant for agentic AI workflows, where models perform multi-step tasks like writing and fixing code. These tasks often consume many tokens by repeatedly referencing past context. Beyond cost, Anthropic also states Fable 5.1 outperforms its predecessor and tackles issues with data retention and overly cautious safety guardrails. Early testers are calling it the best coding model they've used. This could reshape which AI vendors developers choose.