High billing for my project

Since there is no Ultra subscription for the Workspace users, we linked our Antigravity projects to our cloud project. Now, we get quite high billing and when we dig into the costs, we remarked that they come from our working with Antigravity. In order to reduce the costs, I tried to minimize the number of agents, but I don’t know how. I see 18 agents running on the menu tab, while there is no any conversation where a task is in progres..