AFAIK jetbrains has an AI Assistant now, too. But I cannot say anything about how it works.
I love their products, and I would be sad if they can't stay competitive, but it looks like they are taking all the wrong turns.
Honestly speaking I'm not a big fan of chat based assistants, which was one of my complaints about IntelliJ's own assistant. Auto-complete feels more natural, although I can see that the suggestions might be more accurate and to the point with the chat based ones.
I would know, I made the mistake of paying yearly.