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openai/codex

★ 134,902RustApache-2.089

Lightweight coding agent that runs in your terminal

What it is

Codex CLI is a coding agent from OpenAI that runs locally on your computer. If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE. If you want the desktop app experience, run codex app or visit the Codex App page . If you are looking for the cloud-based agent from OpenAI, Codex Web , go to chatgpt.com/codex .

When to use it

Reach for codex when you want an AI to write, refactor or scaffold code in your editor or terminal — it's written in Rust and fits stacks tagged .

Category
AI Coding Tools
Also in
—
Stars
134,902
Forks
21,365
Last push
today
Created
2025-04-13
Open issues
27,184
Website
—
#rust

Quick start

$ git clone https://github.com/openai/codex.git

Hand it to your AI

Read https://ideas.asveas.com/r/openai/codex.md and help me add openai/codex to my project. Explain the setup steps for my stack and show the minimal code to get it working.
AI Coding ToolsMarkdown .mdOpen on GitHub ↵

Alternatives to codex

All AI Coding Tools →
anomalyco avataropencodeThe open source coding agent.★ 226kgoogle-gemini avatargemini-cliAn open-source AI agent that brings the power of Gemini directly into your terminal.★ 109kOpenHands avatarOpenHands🙌 OpenHands: AI-Driven Development★ 93.2kcontinuedev avatarcontinueopen-source coding agent★ 36.5kcline avatarclineAutonomous coding agent as an SDK, IDE extension, or CLI assistant.★ 71.5kKilo-Org avatarkilocodeKilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with the most popular open source coding agent.★ 27.9k

FAQ

What is codex?

openai/codex is an AI coding tool on GitHub: Lightweight coding agent that runs in your terminal Codex CLI is a coding agent from OpenAI that runs locally on your computer.

When should I use codex?

Reach for codex when you want an AI to write, refactor or scaffold code in your editor or terminal — it's written in Rust and fits stacks tagged .

What are the best alternatives to codex?

Popular alternatives in AI Coding Tools: anomalyco/opencode (226k★), google-gemini/gemini-cli (109k★), OpenHands/OpenHands (93.2k★), continuedev/continue (36.5k★), cline/cline (71.5k★).

Is codex actively maintained?

openai/codex looks very actively maintained: the last push was today (2026-11-11), with 134,902 stars and 27,184 open issues.

What license does codex use?

openai/codex is published under the Apache-2.0 license. Check the repository's LICENSE file before commercial use.