151 lines
7.5 KiB
Markdown
151 lines
7.5 KiB
Markdown
---
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library_name: transformers
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license: apache-2.0
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pipeline_tag: text-ranking
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tags:
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- llm-as-judge
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- qwen2
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---
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# CompassJudger-2
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<div align="left" style="line-height: 1;">
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<a href="https://github.com/open-compass/CompassJudger" target="_blank" style="margin: 2px;">
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<img alt="Homepage" src="https://img.shields.io/badge/CompassJudger-GitHub-blue?color=1991ff&logo=github&logoColor=white" style="display: inline-block; vertical-align: middle;"/>
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</a>
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<a href="https://arxiv.org/abs/2507.09104" target="_blank" style="margin: 2px;"">
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<img
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src="https://img.shields.io/badge/CompassJudger--2-Paper-red?logo=arxiv&logoColor=red"
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alt="CompassJudger-2"
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style="display: inline-block; vertical-align: middle;"
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/>
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</a>
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<a href="https://huggingface.co/opencompass" target="_blank" style="margin: 2px;">
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<img alt="Hugging Face" src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-OpenCompass-536af5?color=536af5&logoColor=white" style="display: inline-block; vertical-align: middle;"/>
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</a>
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<a href="https://github.com/open-compass/CompassJudger/blob/main/LICENSE" style="margin: 2px;">
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<img alt="License" src="https://img.shields.io/badge/License-Apache%202.0-f5de53?color=f5de53&logoColor=white" style="display: inline-block; vertical-align: middle;"/>
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</a>
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</div>
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## Introduction
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We introduce **CompassJudger-2**, a novel series of generalist judge models designed to overcome the narrow specialization and limited robustness of existing LLM-as-judge solutions. Current judge models often struggle with comprehensive evaluation, but CompassJudger-2 addresses these limitations with a powerful new training paradigm.
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Key contributions of our work include:
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- **Advanced Data Strategy:** We employ a task-driven, multi-domain data curation and synthesis strategy to enhance the model's robustness and domain adaptability.
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- **Verifiable Reward-Guided Training:** We supervise judgment tasks with verifiable rewards, guiding the model's intrinsic reasoning through chain-of-thought (CoT) and rejection sampling. A refined margin policy gradient loss further enhances performance.
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- **Superior Performance:** CompassJudger-2 achieves state-of-the-art results across multiple judge and reward benchmarks. Our 7B model demonstrates competitive accuracy with models that are significantly larger.
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- **JudgerBenchV2:** We introduce a new, comprehensive benchmark with 10,000 questions across 10 scenarios, using a Mixture-of-Judgers (MoJ) consensus for more reliable ground truth.
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This repository contains the **CompassJudger-2** series of models, fine-tuned on the Qwen2.5-Instruct series.
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## Models
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| Model Name | Size | Base Model | Download | Notes |
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| :--------------------------------- | :--: | :------------------- | :----------------------------------------------------------: | :-------------------------------------------- |
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| 👉 **CompassJudger-2-7B-Instruct** | 7B | Qwen2.5-7B-Instruct | 🤗 [Model](https://huggingface.co/opencompass/CompassJudger-2-7B-Instruct) | Fine-tuned for generalist judge capabilities. |
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| 👉 **CompassJudger-2-32B-Instruct** | 32B | Qwen2.5-32B-Instruct | 🤗 [Model](https://huggingface.co/opencompass/CompassJudger-2-32B-Instruct) | A larger, more powerful judge model. |
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## Quickstart
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Here is a simple example demonstrating how to load the model and use it for pairwise evaluation.
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```python
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import torch
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from transformers import AutoModelForCausalLM, AutoTokenizer
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model_path = "opencompass/CompassJudger-2-7B-Instruct"
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model = AutoModelForCausalLM.from_pretrained(
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model_path,
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torch_dtype="auto",
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device_map="auto"
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)
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tokenizer = AutoTokenizer.from_pretrained(model_path)
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# Example: Pair-wise Comparison
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prompt = """
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Please act as an impartial judge to evaluate the responses provided by two AI assistants to the user question below. Your evaluation should focus on the following criteria: helpfulness, relevance, accuracy, depth, creativity, and level of detail.
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- Do not let the order of presentation, response length, or assistant names influence your judgment.
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- Base your decision solely on how well each response addresses the user’s question and adheres to the instructions.
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Your final reply must be structured in the following format:
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{
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"Choice": "[Model A or Model B]"
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}
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User Question: {question}
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Model A's Response: {answerA}
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Model B's Response: {answerB}
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Now it's your turn. Please provide selection result as required:
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"""
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messages = [
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{"role": "user", "content": prompt}
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]
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text = tokenizer.apply_chat_template(
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messages,
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tokenize=False,
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add_generation_prompt=True
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)
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model_inputs = tokenizer([text], return_tensors="pt").to(model.device)
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generated_ids = model.generate(
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**model_inputs,
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max_new_tokens=2048
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)
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generated_ids = [
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output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)
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]
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response = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0]
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print(response)
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```
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## Evaluation
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CompassJudger-2 sets a new state-of-the-art for judge models, outperforming general models, reward models, and other specialized judge models across a wide range of benchmarks.
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| Model | JudgerBench V2 | JudgeBench | RMB | RewardBench | Average |
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| :--------------------------------- | :------------: | :--------: | :-------: | :---------: | :-------: |
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| **7B Judge Models** | | | | | |
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| CompassJudger-1-7B-Instruct | 57.96 | 46.00 | 38.18 | 80.74 | 55.72 |
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| Con-J-7B-Instruct | 52.35 | 38.06 | 71.50 | 87.10 | 62.25 |
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| RISE-Judge-Qwen2.5-7B | 46.12 | 40.48 | 72.64 | 88.20 | 61.61 |
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| **CompassJudger-2-7B-Instruct** | **60.52** | **63.06** | **73.90** | **90.96** | **72.11** |
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| **32B+ Judge Models** | | | | | |
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| CompassJudger-1-32B-Instruct | 60.33 | 62.29 | 77.63 | 86.17 | 71.61 |
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| Skywork-Critic-Llama-3.1-70B | 52.41 | 50.65 | 65.50 | 93.30 | 65.47 |
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| RISE-Judge-Qwen2.5-32B | 56.42 | 63.87 | 73.70 | 92.70 | 71.67 |
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| **CompassJudger-2-32B-Instruct** | **62.21** | **65.48** | 72.98 | **92.62** | **73.32** |
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| **General Models (for reference)** | | | | | |\
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| Qwen2.5-32B-Instruct | 62.97 | 59.84 | 74.99 | 85.61 | 70.85 |
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| DeepSeek-V3-0324 | 64.43 | 59.68 | 78.16 | 85.17 | 71.86 |
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| Qwen3-235B-A22B | 61.40 | 65.97 | 75.59 | 84.68 | 71.91 |
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For detailed benchmark performance and methodology, please refer to our [📑 Paper](https://huggingface.co/papers/2507.09104).
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## License
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This project is licensed under the Apache 2.0 License. See the [LICENSE](https://github.com/open-compass/CompassJudger/blob/main/LICENSE) file for details.
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## Citation
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If you find our work helpful, please consider citing our paper:
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```bibtex
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@article{zhang2025compassjudger,
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title={CompassJudger-2: Towards Generalist Judge Model via Verifiable Rewards},
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author={Zhang, Taolin and Cao, Maosong and Lam, Alexander and Zhang, Songyang and Chen, Kai},
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journal={arXiv preprint arXiv:2507.09104},
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year={2025}
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}
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``` |