One thing that’s helped me is creating a bake-off. I’ll do it between Claude and codex. Same prompt but separate environments. They’ll both do their thing and then I’ll score them at the end. I find it helps me because frequently only one of them makes a mistake, or one of them finds an interesting solution. Then once I declare a winner I have scripts to reset the bake-off environments.

you can have them review each other's work, too.