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WebJudge

WebJudge preserves critical intermediate screenshots while mitigating the token overload issue, resulting in more accurate and reliable evaluations. Please check our paper for more details.

• Repository
• 📃 Paper
• 🏆 Leaderboard
• 🤗 Data
• Model

Results

Comparison against Existing Evaluation Methods on Online-Mind2Web

WebJudge powered by GPT-4o and o4-mini consistently achieves the highest agreement, with averages of 83.6% and 85.7%, respectively. Meanwhile, WebJudge-7B even outperforms o4-mini, reaching a high agreement with human judgment of 87%.

Excellent generalization capabilities on AgentRewardBench (5 OOD benchmarks)

WebJudge significantly outperforms existing methods, achieving impressive overall precision of 73.7% 75.7% and 82.0% on WebArena (WA), VisualWebArena (VWA), AssistantBench (AB), WorkArena (Work) and WorkArena++ (Wk++) across 1302 trajectories.

The high precision suggests that WebJudge holds potential as a robust and scalable reward model for downstream applications such as Rejection Sampling Fine-Tuning, Reflection, and Reinforcement Learning.

Inference

vLLM server

vllm serve osunlp/WebJudge-7B --port PORT --api-key API_KEY

or

LLaMA-Factory API

API_PORT=PORT llamafactory-cli api examples/inference/qwen2_vl.yaml

Prompt

Please check our Repository and Paper for more details about prompt.

text = """**Task**: {task}

**Key Points for Task Completion**: {key_points}

The snapshot of the web page is shown in the image."""

messages = [
                {"role": "system", "content": system_msg},
                {
                    "role": "user",
                    "content": [
                        {"type": "text", "text": text},
                        {
                            "type": "image_url",
                            "image_url": {"url": f"data:image/jpeg;base64,{jpg_base64_image}", "detail": "high"},
                        },
                    ],
                }
            ]
completion = client.chat.completions.create(
    model=model_path,
    messages=messages,
    temperature=0
)

Citation Information

Note: Online-Mind2Web is derived from the original Mind2Web dataset. We kindly ask that you cite both the original and this work when using or referencing the data.

@article{xue2025illusionprogressassessingcurrent,
      title={An Illusion of Progress? Assessing the Current State of Web Agents}, 
      author={Tianci Xue and Weijian Qi and Tianneng Shi and Chan Hee Song and Boyu Gou and Dawn Song and Huan Sun and Yu Su},
      year={2025},
      eprint={2504.01382},
      archivePrefix={arXiv},
      primaryClass={cs.AI},
      url={https://arxiv.org/abs/2504.01382}, 
}

@inproceedings{deng2023mind2web,
 author = {Deng, Xiang and Gu, Yu and Zheng, Boyuan and Chen, Shijie and Stevens, Sam and Wang, Boshi and Sun, Huan and Su, Yu},
 booktitle = {Advances in Neural Information Processing Systems},
 editor = {A. Oh and T. Naumann and A. Globerson and K. Saenko and M. Hardt and S. Levine},
 pages = {28091--28114},
 publisher = {Curran Associates, Inc.},
 title = {Mind2Web: Towards a Generalist Agent for the Web},
 url = {https://proceedings.neurips.cc/paper_files/paper/2023/file/5950bf290a1570ea401bf98882128160-Paper-Datasets_and_Benchmarks.pdf},
 volume = {36},
 year = {2023}
}