GitHub retires four older models across Copilot experiences

The short version

GitHub deprecated Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7 in Copilot on October 2. It recommends Gemini 3.8 Flash, Kimi K3, and Claude Opus 5.5 as corresponding alternatives.

What changed

The retirement applies across Copilot Chat, inline edits, ask and agent modes, and code completions.

What it means for you

Update workflows to supported models; Enterprise administrators may need to enable alternatives through model policy settings.

Check model names in scripts and integrations, then verify the replacement is available under the organization policy. The official notice gives a migration map, not a comparative capability benchmark.

This is a change within GitHub Copilot. It does not establish that the same models are retired by their original providers. Event precision follows the official October 2 date.

Fact check

VerifiedOn October 2, 2026 GitHub deprecated Gemini 3.5 Flash and 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7 across Copilot experiences.Evidence

VerifiedThe suggested alternatives are Gemini 3.8 Flash for both retired Gemini models, Kimi K3 for Kimi K2.7 Code, and Claude Opus 5.5 for Opus 4.7.Evidence

VerifiedEnterprise administrators may need to enable alternative models in model policies; no action is required to remove retired models.Evidence