How do I set up CereWorker with OpenAI Codex (ChatGPT OAuth)?

[greatwhiz]

If you have a ChatGPT subscription and want to use CereWorker with GPT-5.x models via OAuth (no API key needed), here is how:

1. Install

npm install -g @cereworker/cli

2. Onboard

cereworker onboard

Select OpenAI Codex (ChatGPT OAuth) as the provider.

3. Authenticate

cereworker auth openai-codex

This opens your browser for ChatGPT login. After signing in, the token is saved locally.

4. Run

cereworker

Your config should look like:

cerebrum:
  defaultProvider: openai-codex
  defaultModel: gpt-5.2-codex
  providers:
    openai-codex:
      auth: oauth

Have questions? Ask below!