Codex is OpenAI’s series of AI coding tools that help developers move faster by delegating tasks to powerful cloud and local coding agents.

Aug 10, 2021 · We’ve created an improved version of OpenAI Codex, our AI system that translates natural language to code, and we are releasing it through our API in private beta starting today.

May 16, 2025 · Introducing Codex: a cloud-based software engineering agent that can work on many tasks in parallel, powered by codex-1. With Codex, developers can simultaneously deploy multiple …

The Codex CLI is available on macOS and Linux. Windows support is experimental. For the best Windows experience, use Codex in a WSL workspace and follow our Windows setup guide.

Codex 透過強化學習，以多種環境的實際程式設計任務進行訓練，能產生貼近人類風格和變更請求偏好的程式碼，精準遵循指示，還能反覆執行測試直到通過為止。 我們自今日起向 ChatGPT Pro …

Codex IDE extension Pair with Codex in your IDE Codex is OpenAI’s coding agent that can read, edit, and run code. It helps you build faster, squash bugs, and understand unfamiliar code. With the …

Nov 19, 2025 · Introducing GPT-5.1-Codex-Max, a faster, more intelligent agentic coding model for Codex. The model is designed for long-running, project-scale work with enhanced reasoning and …

Dec 18, 2025 · GPT‑5.2-Codex is now better at long-context understanding, reliable tool calling, improved factuality, and native compaction, making it a more dependable partner for long running …

This lets Codex work with the code in your repositories and create pull requests from its work. Your Plus, Pro, Business, Edu, or Enterprise plan includes Codex.

Understand unfamiliar codebases: Codex can read and explain complex or legacy code, helping you quickly grasp how systems are structured. Review code: Codex analyzes code to identify potential …