GitHub Copilot to Retire Three Models on November 16, 2026
GitHub will remove Claude Opus 4.8, Claude Opus 5, and GPT-5.6 Terra from Copilot on November 16, 2026. Its suggested replacements are Claude Opus 5.5 for the Claude models and GPT-6.1 Sol or GPT-6 Luna for GPT-5.6 Terra. The one exception is Claude Opus 4.8, which stays available to individual Copilot subscribers on annual plans. The article notes this is the third round of retirements in a recurring pattern and urges developers to audit pinned model names in their code, scripts, and CI pipelines. Anthropic's own API continues to offer these models until at least mid-2027.
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