Where did the option go to select which LLM I want to use?

Last week I was able to choose which LLM I wanted to use in my chat via a dropdown box in the bottom of the chat.

That option is now gone, and Cursor only uses GPT-4. I have other models turned on in settings, but there’s no where for me to designate which model I want to use on the current chat. What happened, and how do I get that back?