We will deprecate the following models across all GitHub Copilot experiences (including Copilot Chat, inline edits, ask and agent modes, and code completions) on October 19th, 2026: Model Deprecation date Suggested alternative Gemini 3.7 Flash 2026-10-19 Gemini 3.8 Flash GPT-5.5 2026-10-19 GPT-5.6 Sol GPT-5.4 2026-10-19 GPT-5.6 Sol GPT-5.4 mini 2026-10-19 GPT-5.6 Luna GPT-5 mini 2026-10-19 GPT-5.6 Luna Grok 4.5 2026-10-19 Grok 4.6 Please update your workflows and integrations to use the supported models before this date. Under default model enablement, the suggested alternatives are automatically enabled for Copilot Enterprise and Copilot Business customers unless an administrator has turned off the global default or explicitly disabled the model. If you've turned off the global default, you can enable access to the alternative models through their model policies in Copilot settings. Once enabled, users will see the model in the Copilot Chat model selector in supported GitHub Copilot experiences. No action is required to remove the models after they have been deprecated. GitHub Enterprise customers with questions or concerns are encouraged to contact their account team for assistance. Share your feedback To learn more about the models available in Copilot, see our documentation on supported models . Join the GitHub Community to share your feedback. copilot Share Copied Shared Related Posts Sep.21 Release Grok 4.7 is now available in GitHub Copilot copilot Sep.18 Improvement Copilot code review: An improved review experience copilot Sep.18 Release GitHub Copilot weekly releases — September 14 copilot Sep.17 Improvement Copilot impact dashboard now shows feature engagement account management copilot enterprise management tools ... +2 Sep.17 Improvement Agentic CLI customizations now in the usage metrics API account management copilot enterprise management tools ... +2 Sep.16 Release Copilot budget increase requests are generally available copilot Sep.15 Release GitHub Copilot suggests custom properties definitions copilot platform governance ... +1 Sep.14 <span class="Tag Tag--type-
GitHub Copilot: Upcoming deprecation of selected GitHub Copilot models in mid-October
Released · GitHub / Microsoft
Breaking
Models:Removes Gemini 3.7 Flash ·Removes Gemini 3.8 Flash ·Removes GPT-5.5 ·Removes GPT-5.6 Sol ·Removes GPT-5.4 ·Removes GPT-5.4 Mini ·Removes GPT-5.6 Luna ·Removes GPT-5 Mini ·Removes Grok 4.5 ·Removes Grok 4.6 ·Adds Grok 4.7