Claude Fable 5 generally available in GitHub Copilot

Category: Dev tools
Status: confirmed
Sources: GitHub Changelog 2026-06-09
Summary: Claude Fable 5 became generally available in GitHub Copilot on 2026-06-09 for Pro+, Max, Business, and Enterprise users. The model is selectable in VS Code across chat, ask, edit, and agent modes. Unlike all other Claude models in Copilot, which operate under zero data retention, Fable 5 retains prompts and outputs for up to 30 days for safety classifier operation. Enterprise and Business plan admins must explicitly enable the Claude Fable 5 policy in Copilot settings; the policy is off by default.
Why it matters: Teams using Copilot gain access to Fable 5 for long-horizon autonomous coding, but must accept a 30-day data retention window; enterprise security and compliance teams should evaluate the policy change before enabling.