GitHub Copilot will deprecate selected models across all experiences on December 14, 2026

GitHub will deprecate selected models across all GitHub Copilot experiences on December 14, 2026, according to a changelog post published November 13, 2026 on The GitHub Blog.

Scope of the deprecation

The deprecation applies to every Copilot surface named in the announcement:

• Copilot Chat
• Inline edits
• Ask mode
• Agent mode
• Code completions

GitHub's post lists the affected models alongside their deprecation dates. The model names and any suggested replacements are not included in the feed summary available for this article.

Key details

• Announcement date: November 13, 2026
• Deprecation date: December 14, 2026
• Affected surfaces: all GitHub Copilot experiences, including Chat, inline edits, ask and agent modes, and code completions

For the full list of affected models and any migration guidance, see the original GitHub changelog entry: Upcoming deprecation of selected GitHub Copilot models in December.

What this means

The deprecation is not limited to one feature. It covers chat, edit, agent and completion workflows, so any team that has pinned a specific model in any of these modes is affected. Teams using Copilot should check the full GitHub changelog entry for the list of affected models and confirm which of them their developers have selected before December 14, 2026.