October 15, 2026
GitHub Copilot drops three models from Nov 16: Claude Opus 5 and GPT-5.6 Terra with no exceptions

Starting Nov 16, 2026, GitHub Copilot will stop offering Claude Opus 4.8, Claude Opus 5, and GPT-5.6 Terra. The removal applies to every scenario: chat, inline edits, ask and agent modes, and code completion.