---
license: apache-2.0
---

# Model Card for LoopTool-8B

<!-- Provide a quick summary of what the model is/does. -->

## Model Details

### Model Description

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The LoopTool-8B model is derived from iterative fine-tuning of Qwen3-8B, with a particular emphasis on enhancing the model’s capabilities in tool invocation.
- **Developed by:** SJTU, Xiaohongshu
- **Model type:** Causal Language Models
- **Finetuned from model Qwen3-8B:** https://huggingface.co/Qwen/Qwen3-8B

### Model Sources

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- **Repository:** https://github.com/Rednote-ExperienceAI-Lab/LoopTool
- **Paper:** https://arxiv.org/abs/2511.09148
- **Dataset(Partial)** https://huggingface.co/datasets/zhuiguang-ning/LoopTool-23k

### Model Performance

**The Main Result in BFCL-v3**

|              | Overall | Non-Live | Live  | Multi-Turn |
| :----------: | ------- | -------- | :---: | ---------- |
|   Qwen3-8B   | 66.34   | 88.81    | 78.54 | 33.00      |
| LoopTool-8B  | 74.93   | 89.52    | 84.72 | 50.88      |
|  Qwen3-32B   | 69.25   | 88.90    | 77.83 | 43.12      |
| LoopTool-32B | 79.32   | 91.83    | 88.58 | 57.75      |

**The Main Result in ACEBench (English)**

|              | Overall | Normal | Special | Agent |
| :----------: | ------- | ------ | :-----: | ----- |
|   Qwen3-8B   | 67.1    | 70.9   |  78.0   | 34.2  |
| LoopTool-8B  | 73.4    | 78.0   |  80.7   | 43.3  |
|  Qwen3-32B   | 72.2    | 77.3   |  76.0   | 46.7  |
| Kimi-K2-0711 | 77.4    | 78.9   |  81.3   | 65.0  |
| LoopTool-32B (OpenSource-1st) | 77.5    | 80.5   |  78.7   | 64.1  |





## Citation

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If you find our work helpful, feel free to give us a cite.


```
@misc{zhang2025looptool,
      title={LoopTool: Closing the Data-Training Loop for Robust LLM Tool Calls}, 
      author={Kangning Zhang and Wenxiang Jiao and Kounianhua Du and Yuan Lu and Weiwen Liu and Weinan Zhang and Lei Zhang and Yong Yu},
      year={2025},
      eprint={2511.09148},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2511.09148}, 
}
```