Microsoft Employees Face Limits on Claude Fable 5, Here’s What’s Behind It

Microsoft is restricting internal use of Anthropic’s newly launched Claude Fable 5 due to updated data retention rules. While external GitHub Copilot and Foundry customers have access, Microsoft employees cannot use the model until legal teams review Anthropic’s retention policies. The move highlights growing concerns around AI safety, privacy, and compliance as Anthropic’s Mythos-class models push boundaries in cybersecurity and reasoning capabilities.