01 / 01Oct 19, 2026GitHub Copilot Retires 3 Models Nov 16: Your Migration ChecklistClaude Opus 4.8, Opus 5, GPT-5.6 Terra leave Copilot on Nov 16, 2026. GitHub's swap table, the one exception, and the 7-step migration checklist.Oct 19, 2026·11 min read11 min read#github-copilot#ai-coding#ai-agents#devops→