Help with CallApi

Can someone help me with how to setup the call api to call OpenAI? Do I need to format the headers as JSON? Can’t for the life of me get it to work it keeps saying model is missing but I have model as a header with one of the chat completion models.

Maybe a silly question, but why not use the OpenAI integration or one of Glide AI options instead?

Trying to see if I can get around timeouts and stream results