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[ARTICLE · art-135176] src=tokenstead.ai ↗ pub= topic=ai-agents verified=true sentiment=· neutral

CUA-S1-FORMS

Trycua released CUA-S1-FORMS, a source-only research model for computer use built as a byte-level transformer encoder with an option-attention head that scores each interface element independently to pick fill, check, click, or skip from a fixed option set. The model card states no weights, training datasets, or checkpoint artifacts are distributed yet and claims no performance result, and the 99.7 percent versus Jev comparison circulating on X comes from the vendor launch thread rather than this artifact. The release is MIT-licensed and dated September 2026, with no per-token API provider pricing tracked for CUA-S1-FORMS.

read1 min views1 publishedSep 20, 2026
CUA-S1-FORMS
Image: Tokenstead (auto-discovered)

edge System One research model for computer use from trycua (the 24.9k-star cua repo, MIT-licensed source). A byte-level transformer encoder with an option-attention head: for each interface element it picks fill / check / click / skip from a fixed option set, scoring elements independently. SOURCE-ONLY RELEASE: the model card states no weights, training datasets, or checkpoint artifacts are distributed yet, and claims no performance result. The 99.7 percent vs Jev comparison circulating on X is from the vendor launch thread, not from this artifact.

  • mit (source only no weights published)
  • Sep 2026

Guides covering CUA-S1-FORMS #

Save your hardware and every model page answers the real question: will it run on your machine, and how fast?

Join free - save your rig →

Or run it in the cloud #

    No per-token API provider pricing tracked for CUA-S1-FORMS yet.
        For flagship list prices, see the
        [calculator](https://tokenstead.ai/calculator).

Inference cost over time #

Data accumulates from the first daily sync - longer ranges populate over time. Prices come from OpenRouter snapshots, not a historical API.

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