Codex CLI Configuration Guide

What is Codex CLI

Codex CLI is a powerful AI programming assistant that allows you to collaborate with AI directly in your terminal. Supported on macOS, Linux, and Windows (WSL).

Installation Requirements

• Node.js version ≥ 18.0
• Supported operating systems: macOS, Linux, Windows (WSL)

Note

If you are using Windows, make sure you have WSL installed to use Codex CLI. Do not use Windows built-in cmd.

Installation Steps

1. Install Node.js

If you haven't installed Node.js 18.0 or higher, please install it first.

2. Install Codex CLI

Install using npm:

npm install -g @openai/codex

Or using Homebrew (macOS):

brew install codex

Configure AI-TokenHub API

Get Required Configuration

You need to prepare two important configuration items:

Config	Description	How to Get
OPENAI_API_KEY	API authentication token	Get from API Keys page after registration (starts with sk-)
OPENAI_BASE_URL	API service address	Use https://ai-tokenhub.com/api/v1

Configure Environment Variables

Method 1: Temporary Configuration

Run in your project directory:

export OPENAI_API_KEY="$YOUR_API_KEY"
export OPENAI_BASE_URL="https://ai-tokenhub.com/api/v1"

Method 2: Permanent Configuration

To avoid manually setting environment variables each time, add the configuration to your system config file:

# Add the following to ~/.bashrc or ~/.zshrc
export OPENAI_API_KEY="$YOUR_API_KEY"
export OPENAI_BASE_URL="https://ai-tokenhub.com/api/v1"

Then run:

source ~/.bashrc  # or source ~/.zshrc

Running Codex CLI

Determine the Model to Use

If you want to use the model gpt-5, the corresponding model name on the platform is gpt-5-2025-08-07, so you need to use the parameter --model gpt-5-2025-08-07 when starting.

Launch Codex CLI

Enter your project directory and run:

codex

Select option 2 (Run Codex CLI using API).

First Run Authorization

On first run, select option 1 to grant permissions.

Test Verification

After successful startup, enter "Hello" to test.

FAQ

Request Failed

Check if the API Key is correct and if the account has sufficient balance.

Connection Timeout

Check network connectivity and ensure you can access https://ai-tokenhub.com.

Wrong Model Name

Ensure the model name is spelled correctly. Please check the platform for available models.