Upcoming deprecation of Opus 4.6 (fast)

Short summary

GitHub will deprecate Opus 4.6 (fast) from all Copilot experiences on June 29, 2026. The change affects Copilot Chat, inline edits, ask and agent modes, and code completions. Users relying on this model must migrate to alternatives before the deadline to avoid service disruption.

• •Opus 4.6 (fast) deprecation effective June 29, 2026
• •Impacts Copilot Chat, inline edits, ask/agent modes, code completions
• •Immediate action required to migrate to alternative models

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