Codex CLI
Open-source AI coding agent by OpenAI
From Wikipedia, the free encyclopedia
Codex CLI is an open-source artificial intelligence coding agent developed by OpenAI. It operates through a command-line interface and can read and modify files, execute commands, and perform software development tasks on a user's local computer.[1][2]
| Codex CLI | |
|---|---|
| |
| Developers | OpenAI Open-source contributors |
| Release | April 16, 2025 |
| Written in | Rust |
| Operating system | macOS, Linux, Windows |
| Type | AI coding agent |
| License | Apache License 2.0 |
| Website | developers |
| Repository | https://github.com/openai/codex |
Codex CLI is part of OpenAI's broader Codex software-development platform, alongside Codex extensions for integrated development environments, desktop applications, and cloud-based development.[3]
History
Features
Codex CLI works directly with the files and directories of a software project, allowing it to create and modify source code without requiring an integrated development environment. Through its command-line interface, it can also execute shell commands, use web search, and run build tools, application frameworks, web frameworks, tests, and other development tools used by the project.[5]
The software supports interactive terminal sessions, image input, approval consent, and sandboxing controls governing which commands the agent may execute.[6]
Codex CLI can connect to external tools and services through the Model Context Protocol (MCP), allowing additional capabilities to be exposed to the agent through configured MCP servers.[7]
Codex CLI can use both locally hosted and remote large language models. Local models can be served through Ollama or LM Studio,[8][9] while external model providers can be configured through compatible APIs, including OpenRouter.[10]