# ChatGPT sign-in through the open-source route

> Yolop's codex provider now signs in with OpenAI's open-source Sign in with ChatGPT by default and runs turns on the public Responses API on your ChatGPT plan.

Source: <https://everruns.com/docs/changelog/2026-10-02-yolop-open-source-chatgpt-sign-in/>

Date: 2026-10-02
Products: Yolop
Category: Feature
Available: In Yolop 0.19.0
Pull request: everruns/yolop#806
Pull request: everruns/yolop#808

![Yolop and OpenAI logos side by side, announcing ChatGPT sign-in](https://everruns.com/docs/_astro/integration@2x.Co_7GUS5_ZDNUbA.webp)

A browser sign-in for `--provider codex` now uses OpenAI’s open-source Sign in with ChatGPT by default. Yolop registers its own client for your account on the first sign-in and runs turns on the public Responses API, still billed to your ChatGPT plan. It is a preview route, so a few request options (output token cap, temperature, `speed`) do not apply.

To keep the Codex login, set the route and sign in again:

```bash
yolop config set chatgpt_sign_in codex
```

`YOLOP_CHATGPT_SIGN_IN=codex` does the same. A device login uses the Codex route unless `open-source` is set.

See [Providers and models](https://github.com/everruns/yolop#providers-and-models), [#806](https://github.com/everruns/yolop/pull/806) and [#808](https://github.com/everruns/yolop/pull/808).