Jetbrains AI recently added (beta) access to Gemini Pro 2.5 and there's of course plugins like Continue.dev that provide access to pretty much anything with an API
I have not used any IDEs like Cursor or Zed, so I am not sure what I should be using (on Linux). I typically just get on Claude (claude.ai) or ChatGPT and do everything manually. It has worked fine for me so far, but if there is a way to reduce friction, I am willing to give it a try. I do not really need anything advanced, however. I just want to feed it the whole codebase (at times), some documentation, and then provide prompts. I mostly care about support for Claude and perhaps Gemini (would like to try it out).
Copilot has it in preview. I found it looks deeper on devops tasks in the Agent mode. But context matters, you should include everything and it will push. Now I switch between Cloude and Gemini when one of them starts going circles. Gemini certainly could have more context but Copilot clearly limits it. Didn't try with Studio key though, only default settings.