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

Anthropic has released new AI models, Claude Fable 5.1 and Mythos 5.1, which offer improved performance and lower costs for complex agentic tasks. The update also introduces enhanced privacy features and more precise safety guardrails for enterprise users.
Why it matters
Lowering the cost of agentic AI work is a critical step toward broader enterprise adoption and the practical application of AI in complex workflows.
Anthropic says its newest AI models, Fable 5.1 and Mythos 5.1, address criticisms from customers about price, data retention, and overzealous safeguards. The company claims Claude Fable 5.1 offers stronger performance than Fable 5, but costs around 25 percent less typically and up to 45 percent less for complex agentic tasks, thanks to reduced pricing on cached data that was already processed and stored.
Along with the announcement, a slew of early impressions popped up, including from Every CEO Dan Shipper, who claims, “It’s the strongest coding model we’ve used, but now it’s fast, token-efficient, and crucially actually speaks like a normal person.”
[Media: https://twitter.com/danshipper/status/2094848951568474186?s=20]
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in