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GPT-5.3-Codex is now the base model for Copilot Business and Enterprise
As announced on March 18, 2026, GPT-5.3-Codex is now the base model for all Copilot Business and Copilot Enterprise organizations, replacing GPT-4.1. The base model is used when your organization…
The post GPT-5.3-Codex is now the base model for Copilot Business and Enterprise appeared first on The GitHub Blog.