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Oct 20, 2026
Six GitHub Copilot models were deprecated — replacements still need policy and task checks
GitHub removed Gemini 3.7 Flash, four GPT-5-series options and Grok 4.5 from most Copilot experiences on October 19. GitHub lists replacements, but administrators still need to enable them and teams should re-run representative workflows before treating the mapping as equivalent.
Oct 20, 2026
GitHub’s Copilot model policy API turns model access into auditable configuration
GitHub now exposes generally available GET and PATCH endpoints for Copilot model policies at enterprise, team, app and organization levels. The API can reduce manual drift, but delegation mode, current state and rollout verification still decide which models users can select.
Oct 16, 2026
GitHub Copilot will retire three models November 16 — map every pinned workflow now
GitHub will remove Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra from most Copilot experiences on November 16. The migration affects chat, edits, agents and completions, with one annual-plan exception.