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Data is fundamental to large language models (LLMs). However, understanding of what makes certain data useful for different stages of an LLM workflow, including training, tuning, alignment, in-context learning, etc., and why, remains an…

Artificial Intelligence · Computer Science 2026-05-20 Shiqiang Wang , Herbert Woisetschläger , Hans Arno Jacobsen , Mingyue Ji

Traditional scaling laws in natural language processing suggest that increasing model size and training data enhances performance. However, recent studies reveal deviations, particularly in large language models, where performance…

Machine Learning · Computer Science 2025-07-16 Zhengyu Chen , Siqi Wang , Teng Xiao , Yudong Wang , Shiqi Chen , Xunliang Cai , Junxian He , Jingang Wang

Selecting high-quality data can improve the pretraining efficiency of large language models (LLMs). Existing methods generally rely on heuristic techniques or single quality signals, limiting their ability to evaluate data quality…

Computation and Language · Computer Science 2025-05-23 Liangyu Xu , Xuemiao Zhang , Feiyu Duan , Sirui Wang , Rongxiang Weng , Jingang Wang , Xunliang Cai

Recent work targeting large language models (LLMs) for code generation demonstrated that increasing the amount of training data through synthetic code generation often leads to exceptional performance. In this paper we explore data pruning…

Software Engineering · Computer Science 2024-07-09 Yun-Da Tsai , Mingjie Liu , Haoxing Ren

Contrary to the conventional emphasis on dataset size, we explore the role of data alignment -- an often overlooked aspect of data quality -- in training capable Large Language Models (LLMs). To do so, we use the Task2Vec-based alignment…

Computation and Language · Computer Science 2025-07-04 Krrish Chawla , Aryan Sahai , Mario DePavia , Sudharsan Sundar , Brando Miranda , Elyas Obbad , Sanmi Koyejo

Large-scale models are pretrained on massive web-crawled datasets containing documents of mixed quality, making data filtering essential. A popular method is Classifier-based Quality Filtering (CQF), which trains a binary classifier to…

Machine Learning · Computer Science 2025-10-03 Thiziri Nait Saada , Louis Bethune , Michal Klein , David Grangier , Marco Cuturi , Pierre Ablin

Recent advancements in large language models (LLMs) have significantly improved code generation and program comprehension, accelerating the evolution of software engineering. Current methods primarily enhance model performance by leveraging…

Computation and Language · Computer Science 2025-07-04 Weijie Lyu , Sheng-Jun Huang , Xuan Xia

Data selection in instruction tuning emerges as a pivotal process for acquiring high-quality data and training instruction-following large language models (LLMs), but it is still a new and unexplored research area for vision-language models…

Computation and Language · Computer Science 2024-02-21 Ruibo Chen , Yihan Wu , Lichang Chen , Guodong Liu , Qi He , Tianyi Xiong , Chenxi Liu , Junfeng Guo , Heng Huang

Instruction tuning has optimized the specialized capabilities of large language models (LLMs), but it often requires extensive datasets and prolonged training times. The challenge lies in developing specific capabilities by identifying…

Computation and Language · Computer Science 2026-05-26 Run Zou , Jianhang Ding , Yifan Ding , Wen Wu , Hao Chen , Renshu Gu

Large language models (LLMs) are increasingly used in the creation of online content, creating feedback loops as subsequent generations of models will be trained on this synthetic data. Such loops were shown to lead to distribution shifts -…

Machine Learning · Computer Science 2025-12-29 Grgur Kovač , Jérémy Perez , Rémy Portelas , Peter Ford Dominey , Pierre-Yves Oudeyer

High-quality data plays a critical role in the pretraining and fine-tuning of large language models (LLMs), even determining their performance ceiling to some degree. Consequently, numerous data selection methods have been proposed to…

Computation and Language · Computer Science 2025-07-08 Jiazheng Li , Lu Yu , Qing Cui , Zhiqiang Zhang , Jun Zhou , Yanfang Ye , Chuxu Zhang

Fine-tuning large language models (LLMs) with limited data poses a practical challenge in low-resource languages, specialized domains, and constrained deployment settings. While pre-trained LLMs provide strong foundations, effective…

Computation and Language · Computer Science 2025-10-29 Marton Szep , Daniel Rueckert , Rüdiger von Eisenhart-Rothe , Florian Hinterwimmer

Using Large Language Models (LLMs) to generate synthetic data for model training has become increasingly popular in recent years. While LLMs are capable of producing realistic training data, the effectiveness of data generation is…

Computation and Language · Computer Science 2024-07-23 Yinheng Li , Rogerio Bonatti , Sara Abdali , Justin Wagle , Kazuhito Koishida

In-context learning (ICL) enables large language models (LLMs) to perform new tasks by prompting them with a sequence of training examples. However, it is known that ICL is very sensitive to the choice of training examples: randomly…

Computation and Language · Computer Science 2023-09-13 Ting-Yun Chang , Robin Jia

Instruction tuning plays a critical role in aligning large language models (LLMs) with human preference. Despite the vast amount of open instruction datasets, naively training a LLM on all existing instructions may not be optimal and…

Computer Vision and Pattern Recognition · Computer Science 2024-12-31 Yulei Qin , Yuncheng Yang , Pengcheng Guo , Gang Li , Hang Shao , Yuchen Shi , Zihan Xu , Yun Gu , Ke Li , Xing Sun

In recent years, the use of large language models (LLMs) for text classification has attracted widespread attention. Despite this, the classification accuracy of LLMs has not yet universally surpassed that of smaller models. LLMs can…

Computation and Language · Computer Science 2024-12-11 Min Zeng , Caiquan Liu , Shiqi Zhang , Li Xie , Chen Sang , Xiaoxin Chen

Reliable data quality is crucial for downstream analysis of tabular datasets, yet rule-based validation often struggles with inefficiency, human intervention, and high computational costs. We present a three-stage framework that combines…

Software Engineering · Computer Science 2025-09-23 Ashlesha Akella , Akshar Kaul , Krishnasuri Narayanam , Sameep Mehta

Data quality is a crucial factor in large language models training. While prior work has shown that models trained on smaller, high-quality datasets can outperform those trained on much larger but noisy or low-quality corpora, systematic…

Machine Learning · Computer Science 2026-02-17 Youwei Shu , Shaomian Zheng , Dingnan Jin , Wenjie Qu , Ziyao Guo , Qing Cui , Jun Zhou , Jiaheng Zhang

Efficient instruction tuning aims to enhance the ultimate performance of large language models (LLMs) trained on a given instruction dataset. Curriculum learning as a typical data organization strategy has shown preliminary effectiveness in…

Computation and Language · Computer Science 2025-11-04 Yangning Li , Tingwei Lu , Yinghui Li , Yankai Chen , Wei-Chieh Huang , Wenhao Jiang , Hui Wang , Hai-Tao Zheng , Philip S. Yu

Specializing LLMs in various domain-specific tasks has emerged as a critical step towards achieving high performance. However, the construction and annotation of datasets in specific domains are always very costly. Apart from using superior…

Computation and Language · Computer Science 2024-12-09 Yuanhao Yue , Chengyu Wang , Jun Huang , Peng Wang