609f75acec
This PR fixes a bug that results in a hang in the oauth login flow if a user logs in, then logs out, then logs in again without first closing the browser window. Root cause of problem: We use a local web server for the oauth flow, and it's implemented using the `tiny_http` rust crate. During the first login, a socket is created between the browser and the server. The `tiny_http` library creates worker threads that persist for as long as this socket remains open. Currently, there's no way to close the connection on the server side — the library provides no API to do this. The library also filters all "Connect: close" headers, which makes it difficult to tell the client browser to close the connection. On the second login attempt, the browser uses the existing connection rather than creating a new one. Since that connection is associated with a server instance that no longer exists, it is effectively ignored. I considered switching from `tiny_http` to a different web server library, but that would have been a big change with significant regression risk. This PR includes a more surgical fix that works around the limitation of `tiny_http` and sends a "Connect: close" header on the last "success" page of the oauth flow.
npm i -g @openai/codex
or brew install codex
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 are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager. If you use npm:
npm install -g @openai/codex
Alternatively, if you use Homebrew:
brew install codex
Then simply run codex to get started:
codex
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Team, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup. If you previously used an API key for usage-based billing, see the migration steps. If you're having trouble with login, please comment on this issue.
Model Context Protocol (MCP)
Codex CLI supports MCP servers. Enable by adding an mcp_servers section to your ~/.codex/config.toml.
Configuration
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