The best one I've used for coding is the InelliJ AI. Idk how they trained that sucker but it's pretty good at ripping through boiler plate code and structuring new files / methods based off how your project is already setup. It still has those little hallucinations especially when you ask it to figure out more niche tasks. But It's really increased my productivity. Especially when getting a new repo setup. (I work with micro services)