cua/cua-s1-forms2026.09

A 2.8 MB byte-level transformer for GUI form filling. For each form element it returns one probability per typed option (fill an entity, check, click or skip), using jevlike's option-attention head.

choicesystem-one computer-use forms tiny 706k

cua-s1-forms

A 2.8 MB byte-level transformer for GUI form filling. For each form element it returns one probability per typed option (fill an entity, check, click or skip), using jevlike's option-attention head.

Trained on 10,000 synthetic episodes, it scores 100% on a 196-decision evaluation of real forms against 83.6% for hosted Jev on the same task, and is explicitly not RLCD-calibrated. Siblings in the same organisation: cua-s1-4b-0.2 (an Apache-2.0 LoRA on Qwen3.5-4B, text and multimodal adapters), and cua-s1-4b-0.1 and cua-s1-nano-0.1, which carry no licence.

What it decides

choice — picks one option from a set

At a glance


Parameters	706K
Maker	Cua
Released	2026-09-18
License	mit
Reported accuracy	100.0%

Get the weights

pip install systemonemodels
systemone pull cua/cua-s1-forms

The files are served from the maker's Hugging Face repository, cua-ai/cua-s1-forms, and verified against the checksums recorded here.

This page was opened by System One for Cua, who can claim the organisation and take it over at any time.

Metadata

Architecture: cua-s1
License: mit
Availability: Open weights
Downloads: 0
Updated: 9/25/2026

Evaluation

Decision accuracy100.0%

Suite: 196-decision evaluation on real forms

Model tree

No recorded base model or fine-tunes.

Artifacts

cua-s1-forms.safetensors huggingface · 2.7 MB · 2026.09
cua-s1-forms.pt huggingface · 2.7 MB · 2026.09
cua-s1-forms.json huggingface · 1.0 KB · 2026.09

systemone.yaml

{
  "spec_version": "0.1",
  "model": "cua-s1-forms",
  "namespace": "cua",
  "category": "system-one",
  "architecture": "cua-s1",
  "base_model": null,
  "base_model_source": null,
  "license": "mit",
  "license_name": null,
  "summary": "A 2.8 MB byte-level transformer for GUI form filling. For each form element it returns one probability per typed option (fill an entity, check, click or skip), using jevlike's option-attention head.",
  "tags": [
    "system-one",
    "computer-use",
    "forms",
    "tiny",
    "706k"
  ],
  "capabilities": [
    "choice"
  ],
  "runtime": {
    "framework": "pytorch",
    "entrypoint": null,
    "python": null,
    "hardware": "cpu"
  },
  "artifacts": [],
  "evaluation": {
    "suite": "196-decision evaluation on real forms",
    "suite_version": null,
    "decision_accuracy": 0.9995,
    "calibration_error": null,
    "valid_action_rate": null,
    "median_latency_ms": null,
    "p95_latency_ms": null
  },
  "availability": "open-weights",
  "hosted": null
}

View raw metadata

cua-s1-forms

What it decides

At a glance

Get the weights

Read more