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Codex is OpenAI’s agentic coding tool, included with Plus and Pro plans. If you have a subscription, you can use it as an AI provider instead of Zo’s built-in credits.

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Setup

  1. Open the terminal on your Zo and run codex to start the login flow
  2. Select Sign in with Device Code
Codex sign-in screen with Device Code option selected
  1. You may need to enable device code authorization first in your ChatGPT account. Go to Settings > Security and toggle on Enable device code authorization for Codex.
ChatGPT security settings showing the device code toggle
  1. Codex will display a URL and a one-time code. Open the URL in your browser and enter the code to complete authentication.
Codex terminal showing the device code and URL
  1. Go to Settings > AI Providers and enable Codex
  2. Select your preferred model
Codex settings in Zo
  1. Select “Codex” from the model picker in chat and you’re set