Cited by 24Topic ModelingNatural Language Processing TechniquesAdvanced Neural Network Applications

Densing law of LLMs

Open access
Xiao, Chaojun, Cai, Jie, Zhao, Weilin, Lin, Biyuan, Zeng, Guoyang, Zhou, Jie, Zheng, Zhi, Han, Xu +2 more·2025·Nature Machine Intelligence

Abstract

Abstract Large language models (LLMs) have emerged as a milestone in artificial intelligence. The scaling law indicates that the performance of LLMs can continually improve as the model size increases, which poses challenges for training and deployment. Despite numerous efforts to improve LLM efficiency, there is no general consensus on development trends and evaluation metrics for efficiency of LLMs with different scales. To address this tension between model performance and efficiency, we introduce the concept of capability density as a metric to evaluate the quality of the LLMs and describe the trend of LLMs in terms of both effectiveness and efficiency. Intuitively, capability density can be understood as the capability contained within each unit of model parameters. Capability density provides a unified framework for assessing both model performance and efficiency. Here we show an empirical observation, called the ‘densing law’, that the capability density of LLMs grows exponentially over time. More specifically, using widely used benchmarks for evaluation, the maximum capability density of open-source LLMs doubles approximately every 3.5 months. This reveals that both parameter requirements and inference costs of LLMs for achieving equivalent performance decrease exponentially, offering insights for efficient LLM development strategies.

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  • These findings are consistent with broader trends in LLM development, where model performance has improved with increases in model scale, quality of training data, or information availability.

    “These findings are consistent with broader trends in LLM development, where model performance has improved with increases in model scale, quality of training data, or information availability.117”

    From Large Language Models in Pharmacist-Led Direct Patient Care: A Rapid Review of Published Evaluations (2026) · cites this paper as [117]

    The Abstract says LLM performance improves as model parameters and the amount of training data increase. It does not establish that improvements result from higher-quality training data or greater information availability; those are distinct from data volume. Page numbers are not available in our copy. (LLM, conf=0.87)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 27

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Cited by

Sorted by citations

Authors
Xiao, C., Cai, J., Zhao, W., Lin, B., Zeng, G., Zhou, J., Zheng, Z., Han, X., Liu, Z., & Sun, M.
Affiliations
Beijing National Research Center for Information Science and Technology (CN)
Corresponding author
  • Han, Xu
  • Liu, Zhiyuan
  • Sun, Maosong
Venue
Nature Machine Intelligence
Published
2025-11-06
Volume
7
Issue
11
Pages
1823-1833
ISSN
2522-5839 (ISSN-L)
OpenAlex
W4415954773
Cited by
24
References
12
Citations by year
2026: 23 · 2025: 1
FWCI
9.63
Type
journal article
Language
en
Open access
Locations
Nature Machine Intelligence (publishedVersion, cc-by)
Funders
  • Beijing Municipal Science and Technology Commission (Z241100001324025)
  • National Natural Science Foundation of China (2022ZD0116312)
  • Tsinghua University (Guogiang Institute, Shuimu Tsinghua Scholar Program)
  • China Postdoctoral Science Foundation (BX20250388)
  • Ministry of Industry and Information Technology of the People's Republic of China (DZBM2024-31-0016)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
  • Physical Sciences › Computer Science › Artificial Intelligence › Natural Language Processing Techniques
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Neural Network Applications
Keywords
large language models, scaling laws, model efficiency, parameter efficiency, inference cost, open-source LLMs, performance-efficiency trade-off

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