Anthropic (announced via AWS Machine Learning blog) · Frontier Coding Model

Claude Fable 5.2

Anthropic's Claude Fable 5.2, described as its most capable generally available model for technical work, is now available on Amazon Bedrock and Claude Platform on AWS, alongside Claude Mythos 5.2, which is restricted to Anthropic's verification programmes for cyber security and life sciences work. Anthropic positions Fable 5.2 for agentic coding across multi-repository codebases, long-running multi-day agents, scientific research and financial analysis. The page also covers a claude-api skill for Claude Code that helps migrate code to Fable 5.2; the skill is open source at anthropics/skills on GitHub. Fable 5.2 is a Covered Model with default data retention of up to 30 days and human safety review.