For frontier AI labs
Every layer.One stack.
Models, environments, data and evaluation. Built together to advance computer use.
Explore the stack
Models & infrastructure
We train and run computer-use models on the same stack we use to evaluate agents.
Environments
Full Windows and Linux desktops. Real applications, seeded data, and repeatable starting states.
Data & human feedback
Consumer and computer-use data at scale, with preference signals from blind human comparisons.
Evaluation
Private suites and custom benchmarks. Outcome grading, with full traces behind the results.
Built around your work.
Define the work
Scope the tasks and outcomes that matter.
Build and run
Repeatable environments, outcome graders, and full traces.
Review the signal
Keep results private or publish to CoArena.
A few questions.
Who is Coasty built for?
AI labs developing computer-use models and teams evaluating agents on real workflows.
Can we use our own workflows?
Yes. Coasty supports custom benchmarks, private suites, and real-software task environments.
How does CoArena compare agents?
Two agents attempt the same task. A person compares the runs before either agent is revealed.