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GitHub: Upcoming deprecation of Opus 4.6 (fast)

GitHub will deprecate Opus 4.6 (fast) across GitHub Copilot experiences on June 29, 2026 and recommends moving workflows to Opus 4.8 (fast), with Copilot Enterprise admins potentially needing to update model policies first.

Open source →Back to radar
Score7.8
Popularity79.0
Risknone
TierSilver
Score breakdown
Usefulness8.0
Novelty6.0
Momentum8.0
Maturity7.3
Open-source/build5.8
Evidence5.8
Workflow potential8.6
Setup ease8.8

Popularity is tracked separately. Support, ads, sponsorships, and tips never affect these signals.

Why it matters

Useful for Copilot admins and power users who need to avoid sudden model drift or broken workflow defaults across chat, inline edits, and agent-style coding flows.

Who should use it

GitHub Copilot usersCopilot Enterprise administratorsdeveloper productivity teamsengineering managers standardizing coding-model defaults

Who should skip it

Skip if the source link, docs, or setup requirements do not match your workflow.

Risk explanation

No inherent user-impacting risk is flagged from the captured evidence.

Evidence links

Closest alternatives / related signals

githubcopilotmodel-lifecycledeveloper-workflowenterprise-admin