Datasets for large language models: a comprehensive survey
Yang Liu, Jiahuan Cao, Chongyu Liu, Kai Ding, Lianwen Jin · 2025 · 111 citationsRead the paper
Abstract This paper embarks on an exploration into the Large Language Model (LLM) datasets, which play a crucial role in the remarkable advancements of LLMs. The datasets serve as the foundational infrastructure analogous to a root system that sustains and nurtures the development of LLMs. Consequently, examination of these datasets emerges as a critical topic in research. In order to address the current lack of a comprehensive overview and thorough analysis of LLM datasets, and to gain insights into their current status and future trends, this survey consolidates and categorizes the fundamental aspects of LLM datasets from five perspectives: (1) Pre-training Corpora; (2) Instruction Fine-tuning Datasets; (3) Preference Datasets; (4) Evaluation Datasets; (5) Traditional Natural Language Processing (NLP) Datasets. The survey sheds light on the prevailing challenges and points out potential avenues for future investigation. Additionally, a comprehensive review of the existing available dataset resources is also provided, including statistics from 444 datasets, covering 8 language categories and spanning 32 domains. Information from 20 dimensions is incorporated into the dataset statistics. The total data size surveyed surpasses 774.5 TB for pre-training corpora and 700M instances for other datasets. We aim to present the entire landscape of LLM text datasets, serving as a comprehensive reference for researchers in this field and contributing to future studies. Related resources are available at: \href{https://github.com/lmmlzn/Awesome-LLMs-Datasets}{https://github.com/lmmlzn/Awesome-LLMs-Datasets}.
What the full text shows
Deployed in practice- The survey analyzed a vast collection of LLM datasets, including pre-training corpora and other dataset types. — 444 datasets, >774.5 TB for pre-training corpora, >700M instances for others (Across 8 language categories and 32 domains)
- Evaluation datasets are predominantly small in scale. — 56.4% of evaluation datasets contain fewer than 10K samples (Based on a statistics distribution of 112 evaluation datasets)
- Evaluation datasets are heavily skewed toward specific languages. — English and Chinese are the most prevalent (Based on 112 evaluation datasets)
- Evaluation datasets are distributed across a wide range of domains, though some remain niche. — 112 datasets categorized into 20 evaluation domains (Domains include General, Exam, Subject, NLU, Reasoning, Knowledge, Long Text, Tool, Agent, Code, OOD, Law, Medical, Financial, Social Norms, and Factuality)
- Setup
- Analysis of 444 datasets (including 112 specific evaluation datasets) covering 8 languages and 32 domains.
- How
- The authors conducted a comprehensive survey and categorization of LLM datasets from five perspectives. They consolidated statistics from 444 datasets across 20 dimensions to analyze trends in size, license, language, and domain.
- Limitations
- Limited resources for low-resource minority languages · Lack of evaluation benchmarks for niche areas like ancient texts and cultures · Data pollution/leakage where LLMs learn from evaluation data during pre-training · High cost and subjective bias associated with human evaluation
Summarized by Gemma 4 from the open-access full text · 13 Oct 2026. Read it