Microsoft restricts Anthropic Claude Fable 5

Microsoft>>> has restricted its employees from using Anthropic>>>'s newly launched Claude Fable 5 AI model, citing concerns over Anthropic>>>'s updated data retention policies. Anthropic>>>'s new policy for its Mythos-class models, including Fable 5, mandates a 30-day retention period for prompts and outputs for trust and safety purposes, with potential retention up to two years for flagged content. This departure from traditional zero-retention options in enterprise AI has triggered legal and compliance concerns for Microsoft>>>, particularly regarding customer and proprietary data. While Microsoft>>> makes Claude Fable 5 available to external customers through GitHub Copilot and Microsoft>>>, its internal legal teams are evaluating the policy framework. Other Claude models with zero data retention remain accessible to Microsoft>>> employees. This situation underscores the increasing tension between adopting cutting-edge AI systems and navigating stringent data governance and compliance requirements for large organizations.