Codex writes, tests and documents code with AI.
OpenAI has launched Codex, a new AI coding agent designed to streamline software development by automating routine tasks and improving code reliability.
Built on a version of its o3 model known as codex-1, the agent uses reinforcement learning to generate high-quality code and test it before output.
Codex operates in a secure, cloud-based sandbox that mirrors a user’s environment and integrates with GitHub for real-time access to repositories.
It logs every step, provides test results, and supports customisation through AGENTS.md files, allowing developers to guide the AI.
Currently available to ChatGPT Pro, Enterprise, and Team subscribers, Codex is being piloted by major firms like Cisco, Superhuman, and Kodiak.
OpenAI plans wider access and future upgrades for more complex, asynchronous collaboration, though limitations like lack of image input support remain.
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