CUA-S1 Review 2026: What trycua's System One Computer Use Model Actually Scores
CUA-S1 is not a computer-use agent. It is trycua’s family of small “System One” models that score a closed set of (element, action) options in a single forward pass, returning a probability per option instead of generating action text. Planning, ordering, and execution stay in your application code. That distinction is the whole review. Everything CUA-S1 does well, and everything it fails at, follows from the decision interface it chose. ...