Microsoft has restricted Claude Fable 5 from its internal GitHub Copilot tool, citing concerns over Anthropic’s new 30-day data retention policy for Mythos-class models. But Microsoft isn’t alone. The Information reports AI legal firms are warning the rules could compromise attorney-client privilege, since every other Claude model still supports Zero Data Retention agreements. Enterprises with sensitive workloads are now reconsidering their Fable 5 deployments.
