Anthropic says its newest AI models, Fable 5. 1, address criticisms from customers about price, data retention, and overzealous safeguards. 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. The company claims Claude Fable 5. .