"Engine" vs. "model" parameter.

[spring portal]

When which should be used?

[tranquil ermine]

    model=selected_model,
    messages=messages
)```
It's just model, your gpt response is incorrect.

Well, more like old and depreciated. Here is a better GPT response for you.
https://chat.openai.com/share/94f0cf54-f91c-42d0-a711-eb79146106b1