Upcoming August 2026 model deprecations in GitHub Copilot
GitHub is deprecating select models across all GitHub Copilot experiences including Chat, inline edits, ask and agent modes, and code completions effective September 1st, 2026. Users should prepare to migrate to supported models.
We will deprecate the following models across all GitHub Copilot experiences (including Copilot Chat, inline edits, ask and agent modes, and code completions), on September 1st, 2026:
| Model | Deprecation date | Suggested alternative |
|---|---|---|
| Gemini 3.1 Pro | 9-1-2026 | Gemini 3.6 Flash |
| Claude Opus 4.5 | 9-1-2026 | Claude Opus 4.7, Claude Opus 4.8, or Claude Opus 5 |
| Claude Opus 4.6 | 9-1-2026 | Claude Opus 4.7, Claude Opus 4.8, or Claude Opus 5 |
| Claude Sonnet 4.5 | 9-1-2026 | Claude Sonnet 5 |
| Claude Sonnet 4.6* | 9-1-2026 | Claude Sonnet 5 |
| Raptor Mini | 9-1-2026 | MAI-Code-1-Flash |
Claude Sonnet 4.6 will remain available to individual GitHub Copilot subscribers on annual plans so they retain a Sonnet offering. The deprecation of Claude Sonnet 4.6 does not apply to these customers.
Please update your workflows and integrations to use the supported model before these dates. Copilot Enterprise administrators may need to enable access to the alternative model through their model policies in Copilot settings. As an administrator, you can verify availability by checking your individual Copilot settings and confirming that the policy is enabled for the specific model. Once enabled, you’ll see the model in the Copilot Chat model selector in VS Code and on github.com. No action is required to remove the models once they have been deprecated.
GitHub Enterprise customers with questions or concerns are encouraged to reach out to their account manager for further assistance.
Share your feedback
To learn more about the models available in Copilot, see our documentation on models and get started with Copilot today.
Join the GitHub Community to share your feedback.
The post Upcoming August 2026 model deprecations in GitHub Copilot appeared first on The GitHub Blog.
Source: original entry ↗
More from GitHub
Follow GitHub to get its new changes in your feed and email digest.
Claude Haiku 5.5 now available in GitHub Copilot
Claude Haiku 5.5, Anthropic's lightweight model, is now generally available in GitHub Copilot for fast, high-volume tasks like subagents, quick edits, and terminal operations.
Purpose-built model for leaked secret detection
GitHub introduced a new purpose-built model for detecting leaked secrets that provides context-aware detection to keep pace with modern software development practices, including AI-assisted coding.
Local sandboxing for GitHub Copilot now generally available
GitHub Copilot's local sandboxing feature is now generally available across GitHub Copilot CLI, the GitHub Copilot app, and VS Code sessions using Agent Host, providing developers with a secure environment for testing and development.