Commercial software intelligenceEvidence checked · 8 September 2026
SkuTrace

Commercial product change, preserved as evidence.

SK-2026-164 · AI model lifecycle

GitHub Copilot schedules six model deprecations for 1 September 2026 with a Sonnet 4.6 annual-plan exception

GitHub plans to deprecate Gemini 3.1 Pro, Claude Opus 4.5, Claude Opus 4.6, Claude Sonnet 4.5, Claude Sonnet 4.6 and Raptor Mini across Copilot experiences on 1 September 2026, while Claude Sonnet 4.6 will remain available to individual Copilot subscribers on annual plans.

Deprecation scheduled

Commercial transition

Previous stateThe listed Copilot models remained available without the announced 1 September 2026 cross-experience deprecation date.
→
New stateGitHub has scheduled the six listed models for deprecation across Copilot experiences on 1 September 2026, subject to the explicit Claude Sonnet 4.6 exception for individual annual-plan subscribers.

Who is affected

GitHub Copilot users and enterprise administrators whose workflows or model policies depend on the listed models.

Action required

Move affected workflows to supported alternatives before 1 September 2026, while preserving the stated Sonnet 4.6 exception for individual annual-plan subscribers when evaluating impact.

Evidence boundary

The GitHub notice proves the 1 September 2026 deprecation date, listed model set, suggested alternatives and the Claude Sonnet 4.6 annual individual-plan exception. The exception must not be generalized to other plans or models.

Timeline

  1. Deprecation notice published

    GitHub announced the affected model list, alternatives and annual individual-plan exception for Claude Sonnet 4.6.

  2. Models scheduled for deprecation

    The six listed models are scheduled to be deprecated across Copilot experiences, subject to the stated exception.

Official sources