Tools
Claude Fable 5.1 lands in GitHub Copilot
GitHub said on 1 Sep that Claude Fable 5.1 is generally available in Copilot for Pro+, Max, Business, and Enterprise across VS Code, Visual Studio, CLI, coding agent, github.com, Mobile, JetBrains, Xcode, and Eclipse (gradual rollout). Business/Enterprise admins must enable a policy that is off by default. Unlike most other Claude models in Copilot, Fable 5.1 retains prompts and outputs for Anthropic safety classifiers by default (not for training); eligible enterprises can get time-limited zero data retention until EFS. This is GitHub Copilot availability, not the Anthropic model launch flash, and not Microsoft 365 Copilot.