Flatrouter
Codex

Codex CLI Setup

Point Codex CLI at Flatrouter and reach 100+ models through a single API key.

Codex CLI is OpenAI's AI coding command-line tool. Running it through Flatrouter gets you high rate limits, low latency, and a single endpoint for 100+ models.

Why Flatrouter?

  • High rate limits — generous RPM by default, sized for heavy coding sessions
  • Low latency — global edge nodes with automatic best-route selection
  • 100+ models — OpenAI, Claude, Gemini and other major models behind one endpoint
  • Full protocol support — 100% compatible with the OpenAI protocol

Before you start

Quick start

1. Install Codex CLI

Install globally with npm and verify

2. Configure a model provider

Connect Flatrouter with CC Switch

3. Codex desktop app

Shares the same config.toml as the CLI

Configure Skills

Use Skills and CLAUDE.md to give Claude Code domain knowledge, workflows and tooling it does not have by default.

Install Codex CLI

Install OpenAI's Codex CLI globally with npm and verify the install.

On this page

Why Flatrouter?Before you startQuick start