Ask once and each model answers under its own name. Pin your files and the answers come from those. Ask the same box for a picture or a clip, and the finished file lands in your workspace.
Seats
A conversation seats up to five models. Ask once and every seat answers, each answer signed with the model that wrote it. No pasting the same question into two tabs to find out where they disagree.
Your own documents
Pin a file to the thread, or type @ and name it. When it has to go looking, it ranks your files, reads the likely ones and shows you which one answered. The reply carries the passage it used, so you can check it against the document.
Image generation
Switch the composer to Generate and pick one image model from the catalogue. Every model carries its price in the list, you set the aspect ratio, and the picture comes back in the thread. It is already a file in your workspace by the time you see it.
Video generation
Video takes minutes, so it runs as a job instead of a reply. Pick the model and the length the model offers, and the card in the thread shows where the render has got to. Close the tab and come back: the thread picks the job up again.
The workspace is free to keep. You pay when you run a model, and the price is on screen before you do.