Stack · 2026-10-20
GitHub retires six Copilot models, including GPT-5.5, GPT-5.4 and Grok 4.5
As of October 19, 2026, six models leave most Copilot experiences, with GPT-6.1 Sol, GPT-6 Luna, Gemini 3.8 Flash and Grok 4.7 named as replacements.
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Stack
SaaS, platforms, model releases and the business moves that change what you pay for.