The model picker lists what your chosen agent can run. Heavier models reason further and cost more; lighter ones are quick and cheap and perfectly good at the routine work that fills most of a day.
- Pin the two or three you actually use. Pinned models become one-tap circles on the Machines panel, so starting a session is a single gesture.
- Switch model inside a running session from the Model row in the sidebar — the conversation carries over.
- Usage shows you what you have been spending, broken down so you can see which habits are expensive.