trycua open-sources CUA-S1-FORMS, first in a family of small computer-use 'System One' models

ycombinator · x · 2026-09-19

trycua introduced CUA-S1, a family of small, specialized "System One Models" built for computer use, and open-sourced the first member, CUA-S1-FORMS, which focuses on form-filling tasks.

The companion open-source cua framework (23.1k GitHub stars) provides cross-OS computer-use drivers, scalable fleets of machines, and benchmarks for training, evaluation, and data generation — positioning itself as infrastructure for scaling computer use 2.0.

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