How do we know if our GPT is using the new GPT-4.1 model?

Hey all, ideally I’d be alerted about when my GPT was either (1) automatically updated to use the new GPT-4.1 (which I was alerted to via The Verge), or (2) when I could manually trigger that update process. It matters because I’d like to run my informal test suite and see what breaks and/or what’s better.

As it stands, GPTs are apparently not themselves capable of this kind of introspection. Is there a solution for this, other than a kind OpenAI associate digging into this for us and sharing answers here?

Hi and welcome to the community!

The model used for custom GPTs is set by OpenAI and can’t be changed manually. At the moment, all GPTs use GPT-4o by default.

You can find more details here:
https://help.openai.com/en/articles/8554397-creating-a-gpt

Hope this clarifies things!