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GitHub Copilot Models Deprecate October 19, 2026

GitHub will deprecate selected GitHub Copilot models across all Copilot experiences on October 19, 2026, requiring users to update workflows to supported alternatives.

By Illumora Editorial

Source · Sep 18, 2026, 7:00 PM · On Illumora · Sep 18, 2026, 7:28 PM

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Read the source →GitHub Changelog (Copilot) — Upcoming deprecation of selected GitHub Copilot models in mid-October - GitHub Changelog
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GitHub has announced the deprecation of specific GitHub Copilot models, effective October 19, 2026. This change impacts all GitHub Copilot experiences, including Copilot Chat, inline edits, ask and agent modes, and code completions.

Key Points

  • Selected GitHub Copilot models will be deprecated on October 19, 2026.
  • The deprecation affects all GitHub Copilot experiences, including Copilot Chat, inline edits, ask and agent modes, and code completions.
  • Users must update workflows and integrations to use supported models before the deprecation date.
  • For Copilot Enterprise and Copilot Business customers, suggested alternative models are automatically enabled under default model enablement, unless an administrator has modified settings.
  • Administrators who have turned off the global default can enable alternative models via model policies in Copilot settings.
  • Once enabled, users will see the alternative models in the Copilot Chat model selector.
  • No action is required to remove models after their deprecation.

Context

According to GitHub, the deprecation aims to streamline the models available within the Copilot ecosystem. The company advises customers to transition to supported models to ensure continued functionality. GitHub Enterprise customers with questions are encouraged to contact their account team for assistance.

Why It Matters

This deprecation requires developers and administrators using GitHub Copilot to review their current configurations and update their workflows. Ensuring a timely transition to supported models will prevent disruptions in development processes that rely on Copilot's AI assistance.

What To Do

  • Note the deprecation date of October 19, 2026.
  • Review current GitHub Copilot workflows and integrations to identify reliance on deprecated models.
  • For Copilot Enterprise and Copilot Business customers, verify current model enablement settings.
  • If the global default is off, enable access to alternative models through Copilot settings.
  • Consult GitHub's documentation on supported models for detailed information.
  • GitHub Enterprise customers should contact their account team with any concerns.