OpenAI Codex

OpenAI Codex is a cloud-based AI agent that autonomously writes, debugs, tests, and proposes pull requests for software development workflows.

Codex is a powerful, cloud-based software engineering agent, powered by the specialized codex-1 model (a derivative of the GPT architecture). It streamlines the development lifecycle by autonomously handling complex tasks: writing new features, debugging code, running tests, and generating pull requests directly to a GitHub repository. Operating in a secure, isolated sandboxed environment, Codex ensures reproducible changes and can process multiple tasks in parallel, a key differentiator from sequential human workflows. Developers interact with it through the ChatGPT interface or the Codex CLI, delegating work in plain English (e.g., 'Find and fix a bug where the jump search algorithm doesn't handle empty arrays') to accelerate shipping and improve team productivity.

https://openai.com/codex/