Microsoft tightens Claude Fable access over data-retention worries

Microsoft is restricting internal use of Anthropic’s Claude Fable 5 for its employees while its legal team evaluatesAnthropic’s new data-retention requirements. Claude Fable 5 requires retaining prompts and outputs for up to 30 days (and potentially longer if flagged), raising concerns about customer data and confidentiality. Other Claude models remain available internally under Zero Data Retention, but Claude Fable isn’t in the internal model picker for Microsoft’s GitHub Copilot, highlighting ongoing compliance questions around internal use of the model.