GitHub Copilot retires a set of models across most experiences

GitHub's changelog says that as of October 19, 2026 it has deprecated a set of models across most Copilot experiences, including Copilot Chat, inline edits, ask and agent modes, and code completions. GitHub says the deprecations were announced on September 18, 2026.

GitHub asks users to move workflows and integrations to supported models. Copilot Enterprise administrators may need to enable alternative models in their Copilot model policies; once a policy is enabled the model shows in the Copilot Chat model selector in VS Code and on github.com.