April 17, 2025 — OpenAI has officially released Codex CLI, a new open-source tool that brings artificial intelligence directly into the terminal. Designed to make coding faster and more interactive, Codex CLI connects OpenAI’s language models with your local machine, allowing users to write, edit, and manage code using natural language commands.
The launch comes as part of OpenAI’s wider effort to make AI a more active assistant in software development. Along with the release of their new AI models, o3 and o4-mini, Codex CLI is a step toward building tools that can eventually help developers create full applications with minimal manual input.