GitHub Copilot: Opus 4.6 (fast) Deprecated on June 29, 2026
GitHub CopilotGitHub Copilot will retire Opus 4.6 (fast) on June 29, 2026, replacing it with Opus 4.8 (fast). Enterprise administrators need to explicitly enable Opus 4.8 (fast) in their model policy settings before the deadline so their developers retain access to a fast Opus model.
Sources & Mentions
3 external resources covering this update
What changed
GitHub Copilot is deprecating Opus 4.6 (fast). The model will retire on June 29, 2026, and is being replaced by Opus 4.8 (fast).
Action for Enterprise admins
Enterprise administrators must explicitly enable Opus 4.8 (fast) in their model policy settings before the June 29, 2026 deadline. Without this step, developers in those organizations will lose access to a fast Opus model once Opus 4.6 (fast) is removed.
Why it matters
Model deprecations on a fixed date can interrupt workflows if administrators are not prepared. Enabling the replacement ahead of the deadline ensures a smooth transition with no gap in availability of a fast Opus option.