Microsoft restricts its employees from using Anthropic’s newly released Claude Fable 5 inside GitHub Copilot, according to multiple reports citing concerns about the model’s data retention terms. Sources say Microsoft blocks or limits internal use while its legal team continues reviewing Anthropic’s changes, particularly a requirement that prompts and outputs are retained for 30 days, with longer retention for content flagged for review. The restriction applies to staff use of Claude Fable 5, while Microsoft reportedly makes the model available to paying GitHub Copilot and Foundry customers. Other Claude models remain usable internally under “Zero Data Retention” rules, and Anthropic has not provided a workaround for the Fable 5 retention policy, the reports add. At least one outlet also notes that beyond Microsoft, some legal and enterprise users are assessing potential risks tied to data handling requirements, including possible implications for sensitive workflows. The overall picture across sources is that access for Microsoft employees is paused pending legal review, even as customer rollouts proceed.
Microsoft restricts employees’ access to Anthropic’s Claude Fable 5 over data retention concerns
Microsoft restricts its employees from using Anthropic’s newly released Claude Fable 5 inside GitHub Copilot, according to multiple reports citing concerns about the model’s data retention terms. Sour...
- Microsoft restricts employee use of Anthropic’s Claude Fable 5 in GitHub Copilot
- The restriction is linked to Anthropic’s data retention requirements, including 30-day retention of prompts and outputs
- Microsoft’s legal team is still reviewing the retention changes
- Paying GitHub Copilot and Foundry customers reportedly have access to Claude Fable 5
- Other Claude models remain available internally under Zero Data Retention rules
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.
2 months agoClaude Fable 5 is the most powerful model Anthropic has made available for wider use, with the company citing its performance in software engineering and analytics.
2 months agoFable 5's data retention policy mandates 30 days' storage, or up to two years for flagged content, but Microsoft has concerns.
2 months agoMicrosoft has blocked its own employees from using Anthropic's newly launched Claude Fable 5 inside GitHub Copilot, citing unresolved concerns over a 30-day data retention policy tied to the Mythos-class model. The Verge reports Microsoft's legal team is still reviewing the changes, even as paying Copilot and Foundry customers already have access. Other Claude models remain available internally under Zero Data Retention rules. Anthropic has not offered a workaround.
2 months agoMicrosoft is limiting employees’ use of Anthropic’s Claude Fable 5 while its legal teams evaluate changes to Anthropic’s data retention requirements, Reuters reported Wednesday (June 10), citing a paywalled article by The Verge. Anthropic’s data retention policy for the newly released Claude Fable 5, which is a Mythos-class model, includes retaining prompts and outputs for 30 days on every […] The post Microsoft Balks at Anthropic’s Claude Fable 5 Data Retention Policy appeared first on PYMNTS.com.
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