Addendum to o3 and o4-mini system card: Codex

OpenAI Blog ·

OpenAI releases Codex, a cloud-based coding agent powered by codex-1 (an o3 variant trained via RL on real coding tasks), targeting software engineering workflows.

Categories: Model Releases, Products to Try

Excerpt

Codex is a cloud-based coding agent. Codex is powered by codex-1, a version of OpenAI o3 optimized for software engineering. codex-1 was trained using reinforcement learning on real-world coding tasks in a variety of environments to generate code that closely mirrors human style and PR preferences, adheres precisely to instructions, and iteratively runs tests until passing results are achieved.