You can actually configure the ide with any open ai compatible endpoint, I use llma and it lists all the models that I have currently installed, works well. Or am I missing your point?
Junie in particular, or just their various other "AI Assistant" / "Chat" things? They have multiple confusing overlapping products/modes going on. "JetBrains AI" -- which may or may not be same as "Junie"?, "AI Chat", then there's the "Agents" tab which integrates outside coding agents.
I guess they iterated quite a few products to "not get behind" and see what sticks.
Most recently they integrated air, which is basically an "agent management/orchestrator" where you can run any ACP-compatible agent with any model you want and it's just the single place where you manage them, see their progress, steer them, merge their results etc.
AI Assistant > Providers & API Key
There is an option Third Party AI Provider, where you can select OpenAI compatible, and then you can customize where (core, instant helper, inline etc) do you want to use third party, where JetBrains.
