Ha, I'm working on a similar tool: https://github.com/DrSiemer/codemerger

Glad to see I'm not the only one who prefers to work like that. I don't need many different models though, the free version of Gemini 2.5 Pro is usually enough for me. Especially the 1.000.000 token context length is really useful. I can just keep dumping full code merges in.

I'll have a look at the alternatives mentioned though. Some questions just seem to throw certain models into logic loops.