Can't Use Best OpenRouter Models with Cursor Pro

for more details: this is actually with Cursor Pro+. I tried following the steps here: Again We're having trouble connecting to the model provider. This might be temporary - please try again in a moment - #5 by ZwenAusZwota

but they weren’t relevant as I have no tools nor MCPs nor extensions enabled. I also tried their steps of signing out and then back in but it made the issue worse. now i get “Invalid API Key
Unauthorized User API key” despite everything being toggled back on correctly just like in the video and other solutions.

I have a big 5-hour take home exam tomorrow where they are providing me with an OpenRouter API key. It’s a huge pain to have these issues with Cursor Pro+ at crunch time now.