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GitHub Changelog

GitHub now supports model selection for Claude and Codex third-party coding agents on github.com. Users can choose from multiple Anthropic models (Claude Sonnet/Opus 4.5 and 4.6) when using the Claude agent, and multiple OpenAI models (GPT-5.2-Codex, GPT-5.3-Codex, GPT-5.4) for the Codex agent. This feature mirrors what was already available for the Copilot cloud agent. Access is included with existing Copilot subscriptions, though Business and Enterprise admins must enable the relevant policies.

Model selection for Claude and Codex agents on github.com