GitHub deprecates four models across Copilot experiences on October 2

01 What happened

As of October 2, 2026, GitHub has deprecated four models across all Copilot experiences, including Copilot Chat, inline edits, Ask and Agent modes, and code completions.

02 Key details

• GitHub lists Gemini 3.8 Flash as the suggested alternative for both Gemini 3.5 Flash and Gemini 3.6 Flash, and Kimi K3 for Kimi K2.7 Code.
• For Claude Opus 4.7, GitHub lists Claude Opus 5.5. The company asks users to update workflows and integrations to use supported models.
• Copilot Enterprise administrators may need to enable the policy for each specific alternative model in Copilot settings. Once enabled, the model appears in the Copilot Chat selector in VS Code and on github.com.
• GitHub says no action is required to remove the deprecated models. Separately, it asks users to update their workflows and integrations.

03 Why it matters

The change affects model choices across Copilot experiences. Users should review workflows and integrations, while Enterprise administrators may need to check access to alternatives in their settings.

04 Who it matters to

Software developers and enterprise AI service administrators.