Upcoming deprecation of Opus 4.6 (fast)
Quick Answer
GitHub will deprecate the Opus 4.6 (fast) model across all Copilot experiences, including Chat and code completions, effective June 29, 2026.
Quick Take
Users relying on this model should prepare for the transition to newer alternatives ahead of the deprecation date.
Key Points
- Opus 4.6 (fast) will be deprecated on June 29, 2026.
- Deprecation affects all GitHub Copilot experiences.
- Users should transition to newer models before the deadline.
- Includes Copilot Chat, inline edits, and code completions.
- Plan for changes to maintain productivity post-deprecation.
Source Excerpt
We will deprecate Opus 4. 6 (fast) across all GitHub Copilot experiences (including Copilot Chat, inline edits, ask and agent modes, and code completions), on June 29th, 2026: Model Deprecation date…
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