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Current trends in pre-training Large Language Models (LLMs) primarily focus on the scaling of model and dataset size. While the quality of pre-training data is considered an important factor for training powerful LLMs, it remains a nebulous…

Computation and Language · Computer Science 2025-07-04 Brando Miranda , Alycia Lee , Sudharsan Sundar , Allison Casasola , Rylan Schaeffer , Elyas Obbad , Sanmi Koyejo

Scaling laws for language model training traditionally characterize how performance scales with model size and dataset volume. Prior work has explored architecture variants and data treatments such as dataset filtering and noise injection…

Machine Learning · Computer Science 2026-02-24 Anirudh Subramanyam , Yuxin Chen , Robert L. Grossman

Long-context language models unlock advanced capabilities in reasoning, code generation, and document summarization by leveraging dependencies across extended spans of text. However, a significant portion of readily available long-text data…

Computation and Language · Computer Science 2025-10-31 Haoran Deng , Yingyu Lin , Zhenghao Lin , Xiao Liu , Yizhou Sun , Yi-An Ma , Yeyun Gong

In large language model (LLM) pretraining, data quality is believed to determine model quality. In this paper, we re-examine the notion of "quality" from the perspective of pre- and post-training co-design. Specifically, we explore the…

Machine Learning · Computer Science 2025-05-09 Kenneth Li , Yida Chen , Fernanda Viégas , Martin Wattenberg

Training data plays a crucial role in Large Language Models (LLM) scaling, yet high quality data is of limited supply. Synthetic data techniques offer a potential path toward sidestepping these limitations. We conduct a large-scale…

Poor data quality limits the advantageous power of Machine Learning (ML) and weakens high-performing ML software systems. Nowadays, data are more prone to the risk of poor quality due to their increasing volume and complexity. Therefore,…

Machine Learning · Computer Science 2025-02-20 Manal Rahal , Bestoun S. Ahmed , Gergely Szabados , Torgny Fornstedt , Jorgen Samuelsson

The performance emergence of large language models (LLMs) driven by data scaling laws makes the selection of pre-training data increasingly important. However, existing methods rely on limited heuristics and human intuition, lacking…

Computation and Language · Computer Science 2025-04-09 Ru Peng , Kexin Yang , Yawen Zeng , Junyang Lin , Dayiheng Liu , Junbo Zhao

The performance of large language models (LLMs) is significantly affected by the quality and composition of their pre-training data, which is inherently diverse, spanning various languages, sources, and topics. Effectively integrating these…

Computation and Language · Computer Science 2025-08-11 Jiahui Peng , Xinlin Zhuang , Jiantao Qiu , Ren Ma , Jing Yu , He Zhu , Conghui He

Large Language Models (LLMs) have shown their impressive capabilities, while also raising concerns about the data contamination problems due to privacy issues and leakage of benchmark datasets in the pre-training phase. Therefore, it is…

Computation and Language · Computer Science 2024-06-04 Zhenhua Liu , Tong Zhu , Chuanyuan Tan , Haonan Lu , Bing Liu , Wenliang Chen

We investigate data filtering for large model pretraining via new scaling studies that target the high compute, data-scarce regime. In spite of an apparently common belief that filtering data to include only high-quality information is…

Machine Learning · Computer Science 2026-05-20 Christopher Mohri , John Duchi , Tatsunori Hashimoto

Quality pretraining data is often seen as the key to high-performance language models. However, progress in understanding pretraining data has been slow due to the costly pretraining runs required for data selection experiments. We present…

Computation and Language · Computer Science 2025-03-11 Tristan Thrush , Christopher Potts , Tatsunori Hashimoto

Inspired by the power of large language models (LLMs), our research adapts them to quantum federated learning (QFL) to boost efficiency and performance. We propose a federated fine-tuning method that distills an LLM within QFL, allowing…

Machine Learning · Computer Science 2025-05-27 Dev Gurung , Shiva Raj Pokhrel

Low-quality data can cause downstream problems in high-stakes applications. Data-centric approach emphasizes on improving dataset quality to enhance model performance. High-quality datasets are needed for general-purpose Large Language…

Computation and Language · Computer Science 2023-10-13 Iva Bojic , Josef Halim , Verena Suharman , Sreeja Tar , Qi Chwen Ong , Duy Phung , Mathieu Ravaut , Shafiq Joty , Josip Car

Current approaches to reducing undesired capabilities in language models are largely post hoc, and can thus be easily bypassed by adversaries. A natural alternative is to shape capabilities during pretraining itself. On the proxy task of…

Machine Learning · Computer Science 2026-02-03 Neil Rathi , Alec Radford

Supervised fine-tuning (SFT) is crucial for aligning Large Language Models (LLMs) with human instructions. The primary goal during SFT is to select a small yet representative subset of training data from the larger pool, such that…

Computation and Language · Computer Science 2024-12-10 Tingyu Xia , Bowen Yu , Kai Dang , An Yang , Yuan Wu , Yuan Tian , Yi Chang , Junyang Lin

Large Language Models (LLMs) have seen remarkable advancements, achieving state-of-the-art results in diverse applications. Fine-tuning, an important step for adapting LLMs to specific downstream tasks, typically involves further training…

Computation and Language · Computer Science 2026-04-07 Yuchen Yang , Wenze Lin , Enhao Huang , Zhixuan Chu , Hongbin Zhou , Lan Tao , Yiming Li , Zhan Qin , Kui Ren

Large Language Models (LLMs) have demonstrated exceptional performance across various tasks, with pre-training stage serving as the cornerstone of their capabilities. However, the conventional fixed-length data composition strategy for…

Computation and Language · Computer Science 2025-06-30 Qing Yang , Qiyao Peng , Hongtao Liu , Kai Liu , Bing Qin , Ting Liu

The advent of transformer-based architectures and large language models (LLMs) have significantly advanced the performance of natural language processing (NLP) models. Since these LLMs are trained on huge corpuses of data from the web and…

Computation and Language · Computer Science 2024-08-29 Arkadeep Baksi , Rahul Singh , Tarun Joshi

Large language models (LLMs) operate in two fundamental learning modes - fine-tuning (FT) and in-context learning (ICL) - raising key questions about which mode yields greater language proficiency and whether they differ in their inductive…

Computation and Language · Computer Science 2026-05-19 Bishwamittra Ghosh , Soumi Das , Till Speicher , Qinyuan Wu , Mohammad Aflah Khan , Deepak Garg , Krishna P. Gummadi , Evimaria Terzi

Most large language models are fine-tuned using either expensive human-annotated data or GPT-4 generated data which cannot guarantee performance in certain domains. We argue that although the web-crawled data often has formatting errors…

Computation and Language · Computer Science 2024-08-16 Jing Zhou , Chenglin Jiang , Wei Shen , Xiao Zhou , Xiaonan He