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FuseO1-DeepSeekR1-QwQ-SkyT1-32B-Preview-exl2_4.65bpw

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FuseO1-Preview: System-II Reasoning Fusion of LLMs

| 📑 Paper | 🐱 GitHub Repo | 🤗 Hugging Face | 🌐 Blog |

Fanqi Wan, Longguang Zhong, Ziyi Yang

Sun Yat-sen University

Overview

FuseO1-Preview is our initial endeavor to enhance the System-II reasoning capabilities of large language models (LLMs) through innovative model fusion techniques. By employing advanced SCE merging methodologies, we integrate multiple open-source o1-like LLMs into a unified model. Our goal is to incorporate the distinct knowledge and strengths from different reasoning LLMs into a single, unified model with strong System-II reasoning abilities, particularly in mathematics, coding, and science domains.

To achieve this, we conduct two types of model merging:

Long-Long Reasoning Merging: This approach involves model fusion across LLMs that utilize long-CoT reasoning, with the goal of enhancing long-CoT reasoning capabilities. The resulted FuseAI/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview achieves an accuracy of 60.00 on AIME24, demonstrating significant performance improvements compared to the o1-preview model (44.60) and approaching the performance of the o1-mini model (63.60).
Long-Short Reasoning Merging: This approach involves model fusion between long-CoT and short-CoT LLMs, aiming to improve reasoning capabilities in both long and short reasoning processes. The resulted FuseAI/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview is capable of utilizing both long and short reasoning processes and demonstrates relatively strong performance in long reasoning tasks.

Model	Merge Type	Source Models	HF Link
FuseAI/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview	Long-Long Reasoning Merge	deepseek-ai/DeepSeek-R1-Distill-Qwen-32B, Qwen/QwQ-32B-Preview, NovaSky-AI/Sky-T1-32B-Preview	🤗 Hugging Face
FuseAI/FuseO1-DeekSeekR1-QwQ-32B-Preview	Long-Long Reasoning Merge	deepseek-ai/DeepSeek-R1-Distill-Qwen-32B, Qwen/QwQ-32B-Preview	🤗 Hugging Face
FuseAI/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview	Long-Short Reasoning Merge	deepseek-ai/DeepSeek-R1-Distill-Qwen-32B, Qwen/Qwen2.5-32B-Instruct	🤗 Hugging Face

Long-Long Reasoning Merging

We conduct experiments on these folloing long-cot LLMs.

To reproduce the merged FuseAI/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview model, using the script below.

cd FuseAI/FuseO1-Preview/mergekit
pip3 install -e .
model_save_dir=xx # your path to save the merged models
mergekit-yaml fuseo1_configs/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview.yaml ${model_save_dir}/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview --cudas

To reproduce the merged FuseAI/FuseO1-DeekSeekR1-QwQ-32B-Preview model, using the script below.

cd FuseAI/FuseO1-Preview/mergekit
pip3 install -e .
model_save_dir=xxx # your path to save the merged models
mergekit-yaml fuseo1_configs/FuseO1-DeekSeekR1-QwQ-32B-Preview.yaml ${model_save_dir}/FuseO1-DeekSeekR1-QwQ-32B-Preview --cuda

We provide the example code to use FuseAI/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview.

python3

from vllm import LLM, SamplingParams

llm = LLM(model="FuseAI/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview", tensor_parallel_size=8)
sampling_params = SamplingParams(max_tokens=32768, temperature=0.7, stop=["<｜end▁of▁sentence｜>", "<｜User｜>"], stop_token_ids=[151643, 151644])

conversations = [
    [
        {"role": "system", "content": "You are a helpful and harmless assistant. You should think step-by-step."},
        {"role": "user", "content": "Quadratic polynomials $P(x)$ and $Q(x)$ have leading coefficients $2$ and $-2,$ respectively. The graphs of both polynomials pass through the two points $(16,54)$ and $(20,53).$ Find $P(0) + Q(0).$."},
    ],
]

responses = llm.chat(messages=conversations, sampling_params=sampling_params, use_tqdm=True)

for response in responses:
    print(response.outputs[0].text.strip())

Long-Short Reasoning Merging

We conduct experiments on these folloing long-cot and short-cot LLMs.

To reproduce the merged FuseAI/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview model, using the script below.

cd FuseAI/FuseO1-Preview/mergekit
pip3 install -e .
model_save_dir=xxx # your path to save the merged models
mergekit-yaml fuseo1_configs/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview.yaml ${model_save_dir}/FuseO1-DeekSeekR1-Qwen2. 5-Instruct-32B-Preview --cuda

We provide the code to use FuseAI/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview.

python3

from vllm import LLM, SamplingParams

llm = LLM(model="FuseAI/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview", tensor_parallel_size=8)
sampling_params = SamplingParams(max_tokens=32768, temperature=0.7, stop=["<｜end▁of▁sentence｜>", "<｜User｜>"], stop_token_ids=[151643, 151644])

conversations = [
    [
        {"role": "system", "content": "You are a helpful and harmless assistant. You should think step-by-step."},
        {"role": "user", "content": "Quadratic polynomials $P(x)$ and $Q(x)$ have leading coefficients $2$ and $-2,$ respectively. The graphs of both polynomials pass through the two points $(16,54)$ and $(20,53).$ Find $P(0) + Q(0).$."},
    ],
]

responses = llm.chat(messages=conversations, sampling_params=sampling_params, use_tqdm=True)

for response in responses:
    print(response.outputs[0].text.strip())

Evaluation Results

We test the resulted models on three kinds of benchmarks, including Math Reasoning, Code Reasoning , and Scientific Reasoning.

Math Reasoning

AIME24
MATH500
GSM8K

Scientific Reasoning

GPQA-Diamond
ARC-Challenge
MMLU-Pro
MMLU

Code Reasoning

LiveCodeBench

The evaluation code is modified from SkyThought. In our evaluation, we set the temperature to 0.7 and the max_tokens to 32768. We provide the example to reproduce our results in evaluation.

The system prompt for evaluation is set to:

You are a helpful and harmless assistant. You should think step-by-step.

We are currently attempting to reproduce the results reported in the DeepSeek-R1 paper by experimenting with different system prompts. We will update our findings once we have acquired the original system prompt used in their study.

The evaluation results are shown in the table below:

Models	AIME24	MATH500	GSM8K	GPQA-Diamond	ARC-Challenge	MMLU-Pro	MMLU	LiveCodeBench
o1-preview	44.60	85.50	-	73.30	-	-	90.80	44.60
o1-mini	63.60	90.00	-	60.00	-	80.30	85.20	53.80
deepseek-ai/DeepSeek-R1-Distill-Qwen-32B	46.67	88.20	93.71	57.58	95.90	68.70	82.17	59.69
Qwen/QwQ-32B-Preview	43.33	87.80	95.45	49.49	95.73	63.49	85.19	51.86
NovaSky-AI/Sky-T1-32B-Preview	43.33	86.80	95.15	50.51	95.56	65.80	82.71	51.66
Qwen/Qwen2.5-32B-Instruct	20.00	81.60	93.63	46.46	95.22	56.27	79.63	48.53
FuseAI/FuseO1-DeekSeekR1-Qwen2.5-Instruct-32B-Preview	46.67	87.20	93.33	55.05	96.33	68.61	82.03	60.67
FuseAI/FuseO1-DeekSeekR1-QwQ-32B-Preview	56.67	85.60	93.78	62.12	96.08	68.85	82.65	59.49
FuseAI/FuseO1-DeekSeekR1-QwQ-SkyT1-32B-Preview	60.00	90.00	93.33	62.12	95.90	70.79	83.56	58.90

Future Works

This work is our first attempt effort to achieve knowledge fusion of System-II reasoning LLMs through a model merging approach, which is limited to LLMs with identical scale and architecture. In future work, we plan to employ our explicit model fusion method, based on multi-teacher knowledge distillation, and our implici model fusion method, which utilizes weighted-reward preference optimization for LLMs with different scales and architectures. Furthermore, we intend to explore the combination of knowledge fusion with reinforcement learning (RL) methods, which have been demonstrated as the most effective approach for enhancing reasoning abilities. Stay tuned for the next version of FuseO1!

Citations

@article{wan2024fusechat,
  title={Fusechat: Knowledge fusion of chat models},
  author={Wan, Fanqi and Zhong, Longguang and Yang, Ziyi and Chen, Ruijun and Quan, Xiaojun},
  journal={arXiv preprint arXiv:2408.07990},
  year={2024}
}

async0x42/FuseO1-DeepSeekR1-QwQ-SkyT1-32B-Preview-exl2_4.65bpw