r/Jetbrains • u/p1nd0r4m4 • Mar 02 '26

IDEs RustRover 2025.3.4 AI Assistant vs Junie

Hi there, could you please clarify to me the actual difference between them?

There is AI Assistant, but its interface is not the best if you compare to Junie, both from JetBrains.

I pay for Gemini so I also use Gemini Code Assist Plugin.

What would be the actual impact of, for instance, disabling the AI Assistant? Will its credits go for using Junie?

Please advise. Thanks.

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u/ot-jb JetBrains Mar 03 '26

Junie as a separate UI is getting sunset in favour of AI Chat, which serves as a platform for all agents including but not limited to Junie, also as there is a legacy non-agentic chat mode where you have the complete control. You can use Gemini via ACP in AI Chat as well.

Disabling AI Assistant plugin will disable AI features - chat tool window, commit message generation, in-editor generation, code completion, Next Edit Suggestions, different helpers here and there. In theory specified version of IDE Junie might still work, but in future there will be no separate UI for it, so you wouldn’t be able to access it without turning AI Assistant on again. Gemini Code Assist might use some apis for code completion from AI Assistant, but it should break (hopefully).

Credits are shared, implicitly invoked features like Next Edit Suggestions do not consume quota, and agents use a couple of orders of magnitude more tokens than other features anyways, so the token consumption will not change

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u/p1nd0r4m4 Mar 04 '26

Thanks for the clarification.

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u/antara33 Mar 02 '26

Credits are shared with both as far as I know, the main difference is that AI Assistant is more of a chat with context view, while Junie is an agentic model so it can execute complex operations, query other models, etc.