This is the online-RL checkpoint (the released agent). Its SFT start point is extreme1228/ScaleCUA-qwen3.5-scienceboard-sft. It reaches 54.0% on ScienceBoard (open-source SoTA).

ScaleCUA scales online RL for computer-use agents by pairing VeriGen (verifiable GUI-task synthesis) with Frontier Sampling and Visual Context Segmentation. See the repo for details.

Usage

Serve with an OpenAI-compatible server (e.g. vLLM) and drive it with the evaluation runtime in osworld_eval:

bash

pip install -U vllm
python -m vllm.entrypoints.openai.api_server --model extreme1228/ScaleCUA-qwen3.5-scienceboard \
  --served-model-name scalecua --trust-remote-code --port 8000

Then follow REPRODUCE.md to run ScienceBoard evaluation.

Results

54.0% on ScienceBoard (open-source SoTA) (see the paper for the full table).

License

Weights are released for research; the model inherits the license of its base model (Qwen3.5-9B). Repository code is under the licenses in the GitHub repo.

Citation

bibtex

@misc{lv2026scalecua,
  title  = {ScaleCUA: Scaling Computer Use Agents with Verifiable Task Synthesis and Efficient Online RL},
  author = {Bowen Lv and Xiao Liu and Yanyu Ren and Hanyu Lai and Bohao Jing and Hanchen Zhang and Yanxiao Zhao and Shuntian Yao and Jie Tang and Yuxiao Dong},
  year   = {2026},
  url    = {https://github.com/THUDM/SCALE-CUA}
}