Anthropic launches Claude Fable 5.1, up to 45% cheaper for agentic work

Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work

Anthropic released Fable 5.1 and Mythos 5.1, directly addressing customer complaints about cost, data retention, and overzealous safeguards. Fable 5.1 outperforms Fable 5 while costing ~25% less typically and up to 45% less for complex agentic tasks, driven by lower pricing on cached data. Every CEO Dan Shipper called it the strongest coding model they've used, now fast, token-efficient, and speaking like a normal person. The post doesn't spell out Mythos 5.1 specs or detailed pricing.

Why it matters: Anthropic drops Fable 5.1 and Mythos 5.1 with a clear cost-reduction story for agent workloads — up to 45% cheaper via cached call pricing. Concrete performance and pricing details make this a strong signal. Held at 85 rather than higher because we only have the headline and s...