GitHub Copilot is retiring four models on October 2, 2026

Short answer

GitHub says it will deprecate Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7 on October 2, 2026. It suggests Gemini 3.8 Flash, Kimi K3, and Claude Opus 5 as alternatives. Business and Enterprise administrators may need to enable alternatives in Copilot model policies.

What changed

GitHub announced that Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7 will be deprecated on October 2, 2026, across Copilot Chat, inline edits, ask and agent modes, and code completions. The listed alternatives are Gemini 3.8 Flash for both Gemini models, Kimi K3 for Kimi K2.7 Code, and Claude Opus 5 for Claude Opus 4.7.

Affected product, plan, or suite

All GitHub Copilot experiences, including Copilot Chat, inline edits, ask and agent modes, and code completions.

Date and timing

2026-10-02

Why now

The changelog was published September 3, 2026, and gives October 2, 2026 as the deprecation date. GitHub says no action is required to remove the models after they have been deprecated. It says administrators can verify model availability and policy settings in organization or enterprise Copilot model settings. GitHub Enterprise customers with questions or concerns are encouraged to contact their account team.

Who should care

Copilot users whose workflows or integrations use any of the four listed models, and Copilot Business or Enterprise administrators responsible for model policies. The announcement covers Copilot Chat, inline edits, ask and agent modes, and code completions.

Why it matters

The practical decision is whether to move affected workflows and integrations to supported models before the stated deprecation date. Teams should test the suggested alternatives where model behavior matters, while administrators should confirm that the alternatives are available and enabled.

What this does not change

The source does not specify an exact cutoff time, pricing, quota, performance, or behavioral parity for the alternatives. It also does not say that every alternative is available in every plan or experience; administrators should verify availability in their Copilot settings. No action is required to remove the deprecated models after deprecation, according to GitHub.

Worthd take

This is a concrete model-migration deadline for users and integrations that select one of the four named models. GitHub provides replacement suggestions, but teams should validate them in their own workflows rather than assume equivalent behavior.

What to check next

• Identify workflows and integrations that use Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, or Claude Opus 4.7.
• Test the corresponding suggested alternative in representative workflows before October 2, 2026.
• Business and Enterprise administrators: verify alternative-model availability and enable the relevant model policy if needed.
• Update affected workflows and integrations to supported models before October 2, 2026.
• Contact GitHub or the account team if an Enterprise migration issue remains unresolved.