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

Anthropic released Claude Fable 5.1 and Mythos 5.1, new AI models designed to address customer concerns about cost, data retention, and overly strict safety restrictions. Fable 5.1 delivers better performance than its predecessor while being 25 percent cheaper overall and up to 45 percent cheaper for agentic work (AI systems that can take independent actions to accomplish goals) through lower prices on cached tokens (previously processed data stored for reuse).