Copilot Chat on Web Drops All Gemini Models and GPT-5.2/5.4 — GitHub Consolidates Around OpenAI and Claude Model Families Only

GitHub Changelog·medium signal

GitHub updated Copilot Chat model selection on the web on May 20, 2026, removing all Gemini models and several OpenAI variants (GPT-5.2 Codex, GPT-5.4 nano) to 'deliver more consistent, high-quality responses.' The consolidation signals GitHub's model strategy: OpenAI and Claude models remain across all plan tiers, while Google's models are cut entirely from the web experience. This follows the broader Copilot Individual plan changes limiting model access by tier.