auth.md Codex Docs, 2026-03-07 06:14 UTC → 2026-03-07 18:10 UTC

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27OpenAI bills API key usage through your OpenAI Platform account at standard API rates. See the [API pricing page](https://openai.com/api/pricing/).27OpenAI bills API key usage through your OpenAI Platform account at standard API rates. See the [API pricing page](https://openai.com/api/pricing/).

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29Recommendation is to use API key authentication for programmatic Codex CLI workflows (for example CI/CD jobs). Do not expose Codex execution in untrusted or publicly triggerable environments.29Features that rely on ChatGPT credits, such as [fast mode](https://developers.openai.com/codex/speed), are

30available only when you sign in with ChatGPT. If you sign in with an API key,

31Codex uses standard API pricing instead.

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33Recommendation is to use API key authentication for programmatic Codex CLI workflows (for example CI/CD jobs). Don't expose Codex execution in untrusted or public environments.

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31## Secure your Codex cloud account35## Secure your Codex cloud account

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