Interesting idea! It's a pretty easy way to get a variety of responses.
Some feedback:
The default models can be a bit... dumb. GPT-3 is very outdated at this point. See this screenshot for instance. Seems like both the Deepseek and OpenAI models did not know what I was talking about.
Also, the onboarding where you insert info about yourself can spoil context a lot and sway the answers in a way that's not really relevant though I'm not sure how much of that has to do with your implementation versus the default models being... well, dumb.
Best of luck with the launch :) You've got a solid idea for sure.