Claude Code Projects is Duet except you get to pick the model and you can specify if you want to run a Claude code session on your computer. It’s coordinator that can do ANYTHING. And it’s easy to do things in parallel. Claude Code projects is the best feature in the Claude App. Very underrated. Claude Duet is clearly not using Opus 5.5 for all requests. And once you go Opus 5.5 anything worse is intolerable.