Claude kind of has this already in their Advisor feature. I don't think I've seen it elsewhere. Open harnesses could add this feature and call out to big boy models when required. It's a really great idea.

It’s a lot harder to get right than it sounds. I’ve been trying to as a Pi extension, but models are biased to think they’re better than they actually are.

So far the best results I’ve got have been using a much smaller local model as a simple classifier, that makes a call based on the system prompt and incoming prompt where to route it. It works okay, still a long way to go though