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---



language:
- en
- zh
license: mit
size_categories:
- n<1K
task_categories:
- question-answering
pretty_name: S1-Bench
tags:
- LRM
- System1
- fast-thinking



---

**The benchmark constructed in paper** [S1-Bench: A Simple Benchmark for Evaluating System 1 Thinking Capability of Large Reasoning Models](https://arxiv.org/abs/2504.10368).

## Introduction
S1-Bench is a novel benchmark designed to evaluate Large Reasoning Models' performance on simple tasks that favor intuitive *system 1* thinking rather than deliberative *system 2* reasoning. 
S1-Bench comprises 422 question-answer pairs across four major categories and 28 subcategories, balanced with 220 English and 202 Chinese questions.


## Meta Data
The data set has
- ID: a int feature.
- question: a string feature.
- answer: a string feature.
- language: a string feature.
- category: a string feature.
- sub_category: a string feature.

## Example
```
{
    "ID": 204,
    "question": "What's 7 plus 8?",
    "answer": "15",
    "language": "en",
    "category": "reasoning_question",
    "sub_category": "numerical_reasoning"
}
```
```
{
    "ID": 156,
    "question": "单词"hola"是西班牙语还是法语?",
    "answer": "西班牙语",
    "language": "zh",
    "category": "analysis_questions",
    "sub_category": "language_classification"
}
```
```
{
    "ID": 105,
    "question": "输出一个字母“Z”",
    "answer": "Z",
    "language": "en",
    "category": "instruction_following",
    "sub_category": "repetition_constraints"
}
```
```
{
    "ID": 294,
    "question": "How many minutes equal 1 hour?",
    "answer": "60",
    "language": "en",
    "category": "knowledge_question",
    "sub_category": "measurement_units"
}
```

## Citation
If you find our work useful, please consider citing our paper:
```
@misc{zhang2025s1benchsimplebenchmarkevaluating,
      title={S1-Bench: A Simple Benchmark for Evaluating System 1 Thinking Capability of Large Reasoning Models}, 
      author={Wenyuan Zhang and Shuaiyi Nie and Xinghua Zhang and Zefeng Zhang and Tingwen Liu},
      year={2025},
      eprint={2504.10368},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2504.10368}, 
}
```