Integration · OpenAI

Run Codex CLI through Crazyrouter

Codex CLI supports custom providers in config.toml. The installer adds a Crazyrouter provider, keeps the Responses wire API, and lets you pick any GPT-5, Codex or non-OpenAI model as the default.

Get an API keyGitHub

One-command setup

The recommended path is the current config.toml provider setup, not the older environment-only style. --switch reconfigures an existing install in seconds; --full also installs Node.js and Codex on a clean machine.

  1. 1Run the command

    Pulls the script from GitHub; nothing else is downloaded.

  2. 2Paste your Crazyrouter key

    Pick a default model when asked; you can change it later.

  3. 3Tool talks to Crazyrouter

    Config or env vars are written; the next launch routes through your key.

macOS / Linux
curl -fsSL https://raw.githubusercontent.com/xujfcn/crazyrouter-codex-cli/main/install-crazyrouter-codex.sh | bash -s -- --switch
Windows PowerShell
$env:CRAZYROUTER_CODEX_MODE='switch'; iwr -UseB https://raw.githubusercontent.com/xujfcn/crazyrouter-codex-cli/main/install-crazyrouter-codex.ps1 | iex
What the script does
  • --switch: Codex is already installed; only the provider config changes
  • --full: fresh machine — installs Node.js 22 and @openai/codex first
  • Asks for your key and default model, writes OPENAI_API_KEY and OPENAI_BASE_URL
  • Adds a [model_providers.crazyrouter] block to ~/.codex/config.toml and sets it as model_provider

Scripts are fetched from the public GitHub repo linked below. Read them before piping to a shell if that's your policy; the download-then-run form is in the README.

Manual configuration

~/.codex/config.toml

toml
model = "gpt-5.6-sol"
model_provider = "crazyrouter"

[model_providers.crazyrouter]
name = "Crazyrouter"
base_url = "https://api.crazyrouter.com/v1"
env_key = "OPENAI_API_KEY"
wire_api = "responses"

wire_api = "responses" keeps Codex on the Responses API, which Crazyrouter relays natively for GPT-5 / Codex models.

Environment variable

bash
export OPENAI_API_KEY=sk-your-crazyrouter-key
# Windows: setx OPENAI_API_KEY "sk-your-crazyrouter-key"
Base URL rule

https://api.crazyrouter.com/v1 — This tool is OpenAI-compatible and appends /chat/completions (or /responses) itself. Use the /v1 base URL exactly as shown.

Recommended models

Live Crazyrouter prices, refreshed hourly. Any model in the catalogue works; these are the ones we'd start with.

GPT-5.6 Sol
gpt-5.6-sol
$3.25 in · $19.50 out /1M tokens
GPT-5.3 Codex
gpt-5.3-codex
$1.14 in · $9.10 out /1M tokens
GPT-5.5
gpt-5.5
$3.25 in · $19.50 out /1M tokens

FAQ

Which wire API should I use?

responses. GPT-5 and Codex models are relayed on the Responses API with reasoning items preserved across turns.

Can I use Claude or DeepSeek from Codex?

Yes. Any chat model in the Crazyrouter catalogue can be set as model; the provider block does not change.

Do I still need ChatGPT login?

No. With a custom provider and OPENAI_API_KEY set, Codex never uses the ChatGPT auth flow.

The script says my key is invalid

Make sure the token's model allowlist includes the model you chose and that OPENAI_BASE_URL has no UTM parameters or trailing path beyond /v1.