Microsoft restricts Claude Fable for employees over data retention concerns
infonewsLLM-Specific
securityprivacy
Source: The Verge (AI)June 10, 2026
Summary
Microsoft is restricting employee access to Claude Fable 5, Anthropic's new AI model, because of concerns about its data retention requirements. While the model is available to external GitHub Copilot and Foundry customers, Microsoft employees cannot access it through their internal tools because Claude Fable 5 does not operate under Zero Data Retention (ZDR, a policy where user data is not stored after interactions) like other Claude models do.
Classification
Attack SophisticationTrivial
Impact (CIA+S)
confidentiality
AI Component TargetedAPI
Affected Vendors
MicrosoftAnthropic
Related Issues
Monthly digest — independent AI security research
Original source: https://www.theverge.com/report/947575/microsoft-claude-fable-5-restricted-internally
First tracked: June 10, 2026 at 02:00 PM
Classified by LLM (prompt v3) · confidence: 92%