TechAnthropic launches Claude Fable 5.1, says agentic work can cost up to 45 percent less

Anthropic has released Fable 5.1 and Mythos 5.1 to address complaints about pricing, data retention, and aggressive safeguards. The company says Fable 5.1 is stronger than Fable 5, costs about 25 percent less in typical use and up to 45 percent less for complex agentic tasks, and permits some vulnerability-identification work. Mythos 5.1 is limited to Project Glasswing participants.

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TThe Verge★★☆☆☆2026-09-01 22:01Original