I think Auto-GPT or a similar project did something like this in 2023.

Aider has an option where you can combine different models, so one does the thinking and one implements the changes.

https://aider.chat/docs/leaderboards/

e.g. o3 (high) + 4.1

There used to be more such combinations in this list but it seems they were removed. A while ago I think the best thing on the list was such a hybrid.