The trajectory export feature is smart. Evaluation and training data collection in the same tool.

I'm curious how the benchmarks handle non-determinism. Real GUIs have loading states, animations, popups that appear sometimes but not always. Does cuabench control for that, or is variance just part of the measurement?

Also interested in what "Windows Arena" tests specifically. Windows has so many edge cases - UAC prompts, driver install dialogs, random update notifications. Those feel like the hard mode for computer-use agents.