OpenAI Codex CLI

Codex CLI

Codex CLI is a programming terminal agent launched by OpenAI that can run locally on your computer.

Install

Run the following command in your terminal to install Codex CLI:

npm install -g @openai/codex

MacOS users can use Homebrew:

brew install codex

Configure it to use this platform’s models (MacOS/Linux)

Open ~/.codex/config.toml and configure it as follows:

model = "gpt-5"
model_provider = "jiekou"

[model_providers.jiekou]
name = "JIEKOU using Chat Completions"
base_url = "https://api.highwayapi.ai/openai/v1"
env_key = "OPENAI_API_KEY"
wire_api = "chat"
query_params = {}

For more detailed configuration options, see the official documentation.

Run Codex CLI

Set this site’s ApiKey as an environment variable and run codex:

OPENAI_API_KEY=<API_KEY> codex

Codex VSCode extension

You can also use Codex in VSCode. First configure ~/.codex/config.toml according to the instructions in the previous section, then run the following command:

{
cat << 'EOF' | tee $HOME/.codex/pcodex.sh
#!/bin/bash
OPENAI_API_KEY=sk_xxx /opt/homebrew/bin/codex "$@"
EOF
chmod +x $HOME/.codex/pcodex.sh
}

Then add the following configuration to VSCode settings.json:

{
    "chatgpt.cliExecutable": "/home/path/.codex/pcodex.sh"
}

Note: please replace /home/path with your actual Home directory path.

Getting Started

LLM API

Model Providers

Model Features

Third-party Tool Setup

OpenAI Codex CLI

Codex CLI

Codex VSCode extension

​Codex CLI

​Codex VSCode extension

Codex CLI

Codex VSCode extension