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Large language models (LLMs) are routinely pre-trained on billions of tokens, only to start the process over again once new data becomes available. A much more efficient solution is to continually pre-train these models, saving significant…

Instruction tuning is critical for adapting large language models (LLMs) to downstream tasks, and recent studies have demonstrated that small amounts of human-curated data can outperform larger datasets, challenging traditional data scaling…

Computation and Language · Computer Science 2025-03-07 Jinlong Pang , Jiaheng Wei , Ankit Parag Shah , Zhaowei Zhu , Yaxuan Wang , Chen Qian , Yang Liu , Yujia Bao , Wei Wei

Instruction tuning improves the performance of large language models (LLMs), but it heavily relies on high-quality training data. Recently, LLMs have been used to synthesize instruction data using seed question-answer (QA) pairs. However,…

Computation and Language · Computer Science 2025-05-20 Chi Zhang , Huaping Zhong , Hongtao Li , Chengliang Chai , Jiawei Hong , Yuhao Deng , Jiacheng Wang , Tian Tan , Yizhou Yan , Jiantao Qiu , Ye Yuan , Guoren Wang , Conghui He , Lei Cao

Mid-training has become an important stage in modern LLM development, using large-scale curated mixtures to strengthen capabilities before final post-training. Its data selection problem is distinct: the data are optimized under a…

Artificial Intelligence · Computer Science 2026-05-29 Haowen Wang , Yaxin Du , Jian Yang , Jiajun Wu , Shukai Liu , Yuxuan Zhang , Pingjie Wang , Siheng Chen , Tuney Zheng , Ming Zhou , Xianglong Liu

We study the design decisions of publicly available instruction tuning methods, and break down the development of Flan 2022 (Chung et al., 2022). Through careful ablation studies on the Flan Collection of tasks and methods, we tease apart…

Artificial Intelligence · Computer Science 2023-02-15 Shayne Longpre , Le Hou , Tu Vu , Albert Webson , Hyung Won Chung , Yi Tay , Denny Zhou , Quoc V. Le , Barret Zoph , Jason Wei , Adam Roberts

Large Language Models (LLMs) have transformed software development by enabling code generation, automated debugging, and complex reasoning. However, their continued advancement is constrained by the scarcity of high-quality, publicly…

Software Engineering · Computer Science 2025-08-11 Wasi Uddin Ahmad , Aleksander Ficek , Mehrzad Samadi , Jocelyn Huang , Vahid Noroozi , Somshubra Majumdar , Boris Ginsburg

Data quality plays a critical role in enhancing supervised fine-tuning (SFT) for large language models (LLMs), and token-level data selection has emerged as a promising direction for its fine-grained nature. Despite their strong empirical…

Artificial Intelligence · Computer Science 2025-10-22 Xiaohan Qin , Xiaoxing Wang , Ning Liao , Cancheng Zhang , Xiangdong Zhang , Mingquan Feng , Jingzhi Wang , Junchi Yan

Vision Large Language Models (VLLMs) incur high computational costs due to their reliance on hundreds of visual tokens to represent images. While token pruning offers a promising solution for accelerating inference, this paper, however,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yahong Wang , Juncheng Wu , Zhangkai Ni , Longzhen Yang , Yihang Liu , Chengmei Yang , Ying Wen , Lianghua He , Xianfeng Tang , Hui Liu , Yuyin Zhou

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

Recent progress in Multimodal Large Language Models(MLLMs) often use large image tokens to compensate the visual shortcoming of MLLMs, which not only exhibits obvious redundancy but also greatly exacerbates the already high computation.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-30 Weihao Ye , Qiong Wu , Wenhao Lin , Yiyi Zhou

Instruction tuning has become a foundation for unlocking the capabilities of large-scale pretrained models and improving their performance on complex tasks. Thus, the construction of high-quality instruction datasets is crucial for…

Artificial Intelligence · Computer Science 2026-02-12 Li Du , Hanyu Zhao , Yiming Ju , Tengfei Pan

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

Training high-performing Small Language Models (SLMs) remains costly, even with knowledge distillation and pruning from larger teacher models. Existing work often faces three key challenges: (1) information loss from hard pruning, (2)…

Computation and Language · Computer Science 2025-12-19 Jitai Hao , Qiang Huang , Hao Liu , Xinyan Xiao , Zhaochun Ren , Jun Yu

Large language model (LLM) alignment is typically achieved through learning from human preference comparisons, making the quality of preference data critical to its success. Existing studies often pre-process raw training datasets to…

Machine Learning · Computer Science 2026-03-17 Zizhuo Zhang , Qizhou Wang , Shanshan Ye , Jianing Zhu , Jiangchao Yao , Bo Han , Masashi Sugiyama

The prohibitive training costs of Large Language Models (LLMs) have emerged as a significant bottleneck in the development of next-generation LLMs. In this paper, we show that it is possible to significantly reduce the training costs of…

Computation and Language · Computer Science 2025-05-16 Chenze Shao , Fandong Meng , Jie Zhou

In the instruction fine-tuning of large language models (LLMs), it is widely recognized that a few high-quality instructions are superior to a large number of low-quality instructions. At present, many instruction selection methods have…

Computation and Language · Computer Science 2026-02-16 Qingsong Lv , Yangning Li , Zihua Lan , Zishan Xu , Jiwei Tang , Tingwei Lu , Yinghui Li , Wenhao Jiang , Hong-Gee Kim , Hai-Tao Zheng , Philip S. Yu

Data quality and diversity are key to the construction of effective instruction-tuning datasets. % With the increasing availability of open-source instruction-tuning datasets, it is advantageous to automatically select high-quality and…

Computation and Language · Computer Science 2025-04-21 Yicheng Chen , Yining Li , Kai Hu , Zerun Ma , Haochen Ye , Kai Chen

Recommender systems (RS) have become essential tools for helping users efficiently navigate the overwhelming amount of information on e-commerce and social platforms. However, traditional RS relying on Collaborative Filtering (CF) struggles…

Information Retrieval · Computer Science 2025-02-27 Mingdai Yang , Zhiwei Liu , Liangwei Yang , Xiaolong Liu , Chen Wang , Hao Peng , Philip S. Yu

Recent advancements in code large language models (Code-LLMs) have demonstrated remarkable capabilities in resolving programming related tasks. Meanwhile, researchers have recognized that the quality of pre-training data is crucial for…

Software Engineering · Computer Science 2026-04-10 Chengli Xing , Zhengran Zeng , Gexiang Fang , Rui Xie , Wei Ye , Shikun Zhang

Acquiring high-quality data is often a significant challenge in training machine learning (ML) models for tabular prediction, particularly in privacy-sensitive and costly domains like medicine and finance. Providing natural language…

Machine Learning · Computer Science 2023-04-27 Dylan Slack , Sameer Singh