OpenAI Codex with a ChatGPT subscription

zaly can authenticate to the OpenAI Codex backend using its supported OAuth flows. This lets eligible ChatGPT accounts use subscription-backed Codex access without supplying an OpenAI API key.

Two different forms of OpenAI access

OpenAI Codex (openai-codex) uses ChatGPT-backed access. OpenAI API-key access uses your API credentials and API billing. A ChatGPT subscription is not an API key or a guarantee of API credits.

Sign in

1. Start zaly in your project.
2. Run /login and choose OpenAI Codex.
3. Select the browser or device-code method offered in your environment.
4. Follow the displayed authorization URL/instructions and finish signing in.
5. Run /model and select a model under the openai-codex provider.

After login, /login --model can authenticate against the currently selected model's provider. On a remote/headless machine, use device login when offered; follow the prompts rather than assuming a local browser callback is reachable.

What to expect

Access depends on your account, subscription, model availability, and OpenAI's current limits. Subscription-backed access is not unlimited usage. Rate-limit or quota errors are not necessarily a problem with your credentials.

OAuth credentials are stored locally in the user state directory's auth.json. Do not copy tokens into project files or commit them. zaly uses its own provider integration; signing into another client should not be assumed to sign zaly in.

If it doesn't work

Check that the selected model belongs to OpenAI Codex, not the OpenAI API-key provider. Retry the offered login flow and inspect the actual error. A successful login can still be followed by account/model access restrictions.

See authentication for precedence and troubleshooting for diagnostics and safe reporting.