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Advances the frontier of coding and computer work. SOTA on SWE-Bench Pro (57%) and OSWorld (64%). Features mid-task steerability (interact while it works), 25% faster speeds, and "High" capabilities in cybersecurity.
GPT-5.3-CodexExpanding Codex to the full spectrum of computer work
Introducing the Codex app for macOS—a command center for AI coding and software development with multiple agents, parallel workflows, and long-running tasks.
The Codex app changes how software gets built and who can build it—from pairing with a single coding agent on targeted edits to supervising coordinated teams of agents across the full lifecycle of designing, building, shipping, and maintaining software.

Codex by OpenAIA command center for working with agents
One agent for everywhere you code—included in ChatGPT Plus, Pro, Business, Edu, and Enterprise plans.

Codex by OpenAIYour new software engineering teammate
For developers who live in the terminal and want ChatGPT‑level reasoning plus the power to actually run code, manipulate files, and iterate – all under version control. In short, it’s chat‑driven development that understands and executes your repo.

OpenAI Codex CLIFrontier reasoning in the terminal

