Self-calibration for Language Model Quantization and Pruning

Miles Williams, George Chrysostomou, Nikolaos Aletras


Abstract
Quantization and pruning are fundamental approaches for model compression, enabling efficient inference for language models. In a post-training setting, state-of-the-art quantization and pruning methods require calibration data, a small set of unlabeled examples. Conventionally, this is randomly sampled web text, aiming to reflect the model training data. However, this poses two key problems: (1) unrepresentative calibration examples can harm model performance, and (2) organizations increasingly avoid releasing model training data. In this paper, we propose self-calibration as a solution. Our approach requires no external data, instead leveraging the model itself to generate synthetic calibration data, with a view to better approximating the pre-training data distribution. We extensively compare the performance of self-calibration with several baselines, across a variety of models, compression methods, and tasks. Our approach proves consistently competitive in maximizing downstream task performance, frequently outperforming even using real data.
Anthology ID:
2025.naacl-long.509
Volume:
Proceedings of the 2025 Conference of the Nations of the Americas Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers)
Month:
April
Year:
2025
Address:
Albuquerque, New Mexico
Editors:
Luis Chiruzzo, Alan Ritter, Lu Wang
Venue:
NAACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
10149–10167
Language:
URL:
https://preview.aclanthology.org/corrections-2025-06/2025.naacl-long.509/
DOI:
10.18653/v1/2025.naacl-long.509
Bibkey:
Cite (ACL):
Miles Williams, George Chrysostomou, and Nikolaos Aletras. 2025. Self-calibration for Language Model Quantization and Pruning. In Proceedings of the 2025 Conference of the Nations of the Americas Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers), pages 10149–10167, Albuquerque, New Mexico. Association for Computational Linguistics.
Cite (Informal):
Self-calibration for Language Model Quantization and Pruning (Williams et al., NAACL 2025)
Copy Citation:
PDF:
https://preview.aclanthology.org/corrections-2025-06/2025.naacl-long.509.pdf