OpenAI Codex CLI Setup Guide

Configure Crazyrouter API in OpenAI Codex CLI

Overview

OpenAI Codex CLI is OpenAI’s official command-line programming assistant that supports AI-assisted programming in the terminal.

Configuration

Environment Variables

export OPENAI_API_KEY=sk-xxx
export OPENAI_BASE_URL=https://crazyrouter.com/v1

Launch

codex

Specify Model

codex --model gpt-4o

Configuration File

Create ~/.codex/config.json:

{
  "model": "gpt-4o",
  "apiKey": "sk-xxx",
  "baseURL": "https://crazyrouter.com/v1"
}

Codex CLI uses the OpenAI format by default, which Crazyrouter fully supports. Just change the Base URL and API Key.