AdaMSS: Adaptive Multi-Subspace Approach for Parameter-Efficient Fine-Tuning

NeurIPS 2025 · Second author

Jingjing Zheng, Wanglong Lu, Yiming Dong, Chaojie Ji, Yankai Cao, Zhouchen Lin

AdaMSS framework

Brief description:

AdaMSS is an adaptive multi-subspace approach for parameter-efficient fine-tuning. It models incremental updates with multiple subspaces, improving the expressiveness-efficiency trade-off when adapting large pretrained models while keeping the base weights frozen.

Highlights:

  • Multi-subspace-based incremental update for parameter-efficient adaptation.
  • Designed to capture richer update structures than single low-rank adaptation under a compact parameter budget.
  • Accepted at NeurIPS 2025 and integrated into the Hugging Face PEFT package.

AdaMSS multi-subspace structure

[paper] [doi] [github] [peft integration]

Recommended citation:

@inproceedings{zheng2025adamss,
  title={AdaMSS: Adaptive Multi-Subspace Approach for Parameter-Efficient Fine-Tuning},
  author={Zheng, Jingjing and Lu, Wanglong and Dong, Yiming and Ji, Chaojie and Cao, Yankai and Lin, Zhouchen},
  booktitle={Advances in Neural Information Processing Systems},
  volume={38},
  year={2025},
  doi={10.52202/085713-0664},
}