GitHub Copilot to deprecate three models on November 16, 2026

GitHub will deprecate Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra across all GitHub Copilot experiences on November 16, 2026, according to a GitHub Copilot changelog post.

The changelog suggests Claude Opus 5.5 to replace the two Claude Opus models, and GPT-6.1 Sol or GPT-6 Luna to replace GPT-5.6 Terra.

Claude Opus 4.8 stays available to individual subscribers on annual plans. For Copilot Enterprise and Copilot Business customers, the suggested alternatives are enabled automatically under default model enablement, unless an administrator has turned off the global default or disabled the model. The changelog says no user action is required to remove the models after deprecation.