3-bit quantized Olmo-3-7B-Think-DPO based on QuantLRM: Quantization of Large Reasoning Models via Fine-Tuning Signals, a state-of-the-art quantization method of large reasoning models via fine-tuning signals

Model Details

This is the pseudo-quantized model (weights are dequantized back to full-precision) to facilitate the use of vLLM, which is the recommended way of inference. To obtain the real quantized version, please refer to our Github repo. We use an existing CUDA kernel to support the inference of 4-bit real quantized models.

Model Description

Developed by: Nan Zhang (njz5124@psu.edu)
Model type: 3-bit pseudo-quantized version of Olmo-3-7B-Think-DPO
Base Model: allenai/Olmo-3-7B-Think-DPO

Model Sources

Repository: https://github.com/psunlpgroup/QuantLRM
Paper: QuantLRM: Quantization of Large Reasoning Models via Fine-Tuning Signals

Uses

This model is designed to be used with vLLM due to its inference optimization. Please use the tokenizer of allenai/Olmo-3-7B-Think-DPO.

Calibration Data

We use the default calibration set of QuantLRM (mit-han-lab/pile-val-backup) to obtain this model.

Results

This model improves upon the best 3-bit quantization baseline (based on average scores of various reasoning benchmarks) on Olmo-3-7B-Think-DPO (Table 2 of QuantLRM).

Citation

BibTeX:

bibtex

@misc{zhang2026quantlrmquantizationlargereasoning,
      title={QuantLRM: Quantization of Large Reasoning Models via Fine-Tuning Signals}, 
      author={Nan Zhang and Eugene Kwek and Yusen Zhang and Muyu Pan and Suhang Wang and Prasenjit Mitra and Rui Zhang},
      year={2026},
      eprint={2602.02581},
      archivePrefix={arXiv},
      primaryClass={cs.LG},
      url={https://arxiv.org/abs/2602.02581}, 
}

APA:

Zhang, N., Kwek, E., Zhang, Y., Pan, M., Wang, S., Mitra, P., & Zhang, R. (2026). QuantLRM: Quantization of Large Reasoning Models via Fine-Tuning Signals. arXiv preprint arXiv:2602.02581.

Model Card Author

Nan Zhang

Model Card Contact

njz5124@psu.edu

nanzhang/QuantLRM-Olmo-3-7B-Think-DPO-3-bit

QuantLRM-Olmo-3-7B-Think-DPO-3-bit