OpenAI machine translation not available in 5.2.1 UI

[fabioscarito]

Hi,
I recently upgraded Weblate to version 5.2.1 and I'm trying to configure machine translation services. However, I don't see OpenAI listed among the available machine translation engines in the admin interface (under Machine translation settings).
Looking at the documentation at https://docs.weblate.org/en/weblate-5.2.1/admin/machine.html I can see OpenAI is mentioned, but I can't find where to enable it or what environment variable to set in my Docker setup.
My setup:

Weblate 5.2.1
Docker / docker-compose deployment
PostgreSQL 13

Is there a specific environment variable I need to add to my environment file to enable OpenAI as a machine translation option? Something like WEBLATE_MT_OPENAI_KEY?
Thanks in advance.

[nijel]

These are configured in the UI; the documentation you've linked describes that.

PS: You might want to upgrade to the up-to-date version; the LLM world changes rapidly, and there have been quite a few changes in the way we use it since then.