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Several post-training quantization methods have been applied to large language models (LLMs), and have been shown to perform well down to 8-bits. We find that these methods break down at lower bit precision, and investigate quantization…

Computation and Language · Computer Science 2023-05-30 Zechun Liu , Barlas Oguz , Changsheng Zhao , Ernie Chang , Pierre Stock , Yashar Mehdad , Yangyang Shi , Raghuraman Krishnamoorthi , Vikas Chandra

Large Language Models (LLMs) have showcased remarkable impacts across a wide spectrum of natural language processing tasks. Fine-tuning these pretrained models on downstream datasets provides further significant performance gains; however,…

Computation and Language · Computer Science 2026-03-19 Zhikai Li , Xiaoxuan Liu , Banghua Zhu , Zhen Dong , Qingyi Gu , Kurt Keutzer

Large Language Models (LLMs) have shown an impressive capability in code generation. The LLM effectiveness generally increases with its size: The higher the number of LLM's trainable parameters the better its ability to implement code.…

Software Engineering · Computer Science 2026-01-28 Alessandro Giagnorio , Antonio Mastropaolo , Saima Afrin , Massimiliano Di Penta , Gabriele Bavota

Large Language Models (LLMs) offer powerful capabilities, but their significant size and computational requirements hinder deployment on resource-constrained mobile devices. This paper investigates Post-Training Quantization (PTQ) for…

Machine Learning · Computer Science 2025-12-09 Agatsya Yadav , Renta Chintala Bhargavi

Post-training quantization (PTQ) of large language models (LLMs) holds the promise in reducing the prohibitive computational cost at inference time. Quantization of all weight, activation and key-value (KV) cache tensors to 4-bit without…

Machine Learning · Computer Science 2025-02-05 Utkarsh Saxena , Sayeh Sharify , Kaushik Roy , Xin Wang

Large language models (LLMs) face the challenges in fine-tuning and deployment due to their high memory demands and computational costs. While parameter-efficient fine-tuning (PEFT) methods aim to reduce the memory usage of the optimizer…

Machine Learning · Computer Science 2023-10-31 Jeonghoon Kim , Jung Hyun Lee , Sungdong Kim , Joonsuk Park , Kang Min Yoo , Se Jung Kwon , Dongsoo Lee

Large language models (LLMs) have revolutionized natural language processing tasks. However, their practical deployment is hindered by their immense memory and computation requirements. Although recent post-training quantization (PTQ)…

Machine Learning · Computer Science 2024-03-19 Wenqi Shao , Mengzhao Chen , Zhaoyang Zhang , Peng Xu , Lirui Zhao , Zhiqian Li , Kaipeng Zhang , Peng Gao , Yu Qiao , Ping Luo

The size of a model has been a strong predictor of its quality, as well as its cost. As such, the trade-off between model cost and quality has been well-studied. Post-training optimizations like quantization and pruning have typically…

Machine Learning · Computer Science 2025-08-29 Giuseppe Franco , Pablo Monteagudo-Lago , Ian Colbert , Nicholas Fraser , Michaela Blott

We introduce a method that dramatically reduces fine-tuning VRAM requirements and rectifies quantization errors in quantized Large Language Models. First, we develop an extremely memory-efficient fine-tuning (EMEF) method for quantized…

Computation and Language · Computer Science 2023-06-16 Yuji Chai , John Gkountouras , Glenn G. Ko , David Brooks , Gu-Yeon Wei

Large language models (LLMs) have demonstrated remarkable capabilities across diverse domains, but their heavy resource demands make quantization-reducing precision to lower-bit formats-critical for efficient serving. While many…

Performance · Computer Science 2025-08-26 Tianyao Shi , Yi Ding

Large language models (LLMs) show excellent performance but are compute- and memory-intensive. Quantization can reduce memory and accelerate inference. However, existing methods cannot maintain accuracy and hardware efficiency at the same…

Computation and Language · Computer Science 2024-04-03 Guangxuan Xiao , Ji Lin , Mickael Seznec , Hao Wu , Julien Demouth , Song Han

Vision-Language Models (VLMs) have enabled a variety of real-world applications. The large parameter size of VLMs brings large memory and computation overhead which poses significant challenges for deployment. Post-Training Quantization…

Computer Vision and Pattern Recognition · Computer Science 2025-03-24 Shiyao Li , Yingchun Hu , Xuefei Ning , Xihui Liu , Ke Hong , Xiaotao Jia , Xiuhong Li , Yaqi Yan , Pei Ran , Guohao Dai , Shengen Yan , Huazhong Yang , Yu Wang

Large language models (LLMs) now support context windows exceeding 128K tokens, but this comes with significant memory requirements and high inference latency. Quantization can mitigate these costs, but may degrade performance. In this…

Computation and Language · Computer Science 2025-09-23 Anmol Mekala , Anirudh Atmakuru , Yixiao Song , Marzena Karpinska , Mohit Iyyer

The inference of Large language models (LLMs) requires immense computation and memory resources. To curtail these costs, quantisation has merged as a promising solution, but existing LLM quantisation mainly focuses on 8-bit. In this work,…

Machine Learning · Computer Science 2024-03-15 Cheng Zhang , Jianyi Cheng , Ilia Shumailov , George A. Constantinides , Yiren Zhao

The burgeoning computational demands for training large language models (LLMs) necessitate efficient methods, including quantized training, which leverages low-bit arithmetic operations to reduce costs. While FP8 precision has shown…

Machine Learning · Computer Science 2025-02-18 Jiecheng Zhou , Ding Tang , Rong Fu , Boni Hu , Haoran Xu , Yi Wang , Zhilin Pei , Zhongling Su , Liang Liu , Xingcheng Zhang , Weiming Zhang

Large Language Models (LLMs) are powerful tools for modern applications, but their computational demands limit accessibility. Quantization offers efficiency gains, yet its impact on safety and trustworthiness remains poorly understood. To…

Cryptography and Security · Computer Science 2025-07-01 Artyom Kharinaev , Viktor Moskvoretskii , Egor Shvetsov , Kseniia Studenikina , Bykov Mikhail , Evgeny Burnaev

As Large Language Models (LLMs) become increasingly computationally complex, developing efficient deployment strategies, such as quantization, becomes crucial. State-of-the-art Post-training Quantization (PTQ) techniques often rely on…

Machine Learning · Computer Science 2025-01-17 Alireza Ghaffari , Sharareh Younesian , Boxing Chen , Vahid Partovi Nia , Masoud Asgharian

In Large Language Models (LLMs), the number of parameters has grown exponentially in the past few years, e.g., from 1.5 billion parameters in GPT-2 to 175 billion in GPT-3 to possibly more than trillion in higher versions. This raises a…

Computation and Language · Computer Science 2026-01-06 Mahmoud Elgenedy

Post-training quantization (PTQ) of large language models (LLMs) to extremely low bit-widths remains challenging due to the fundamental trade-off between computational efficiency and representational capacity. While existing ultra-low-bit…

Machine Learning · Computer Science 2026-01-05 He Xiao , Runming Yang , Qingyao Yang , Wendong Xu , Zhen Li , Yupeng Su , Zhengwu Liu , Hongxia Yang , Ngai Wong

Quantization is a powerful tool for accelerating large language model (LLM) inference, but the accuracy-performance trade-offs across different formats remain unclear. In this paper, we conduct the most comprehensive empirical study to…

Machine Learning · Computer Science 2026-05-27 Eldar Kurtic , Alexandre Marques , Shubhra Pandit , Mark Kurtz , Dan Alistarh