HuggingGraph: Understanding the Supply Chain of LLM Ecosystem

• URL: http://arxiv.org/abs/2507.14240v1
• Date: Thu, 17 Jul 2025 17:34:13 GMT
• Title: HuggingGraph: Understanding the Supply Chain of LLM Ecosystem
• Authors: Mohammad Shahedur Rahman, Peng Gao, Yuede Ji,
• Abstract summary: Large language models (LLMs) leverage deep learning to process and predict sequences of words from context.<n>As a result, platforms that host models and datasets are widely used.<n>This project aims to study the relationships between models and datasets, which are core components of the LLM supply chain.
• Score: 9.61483474473764
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Large language models (LLMs) leverage deep learning to process and predict sequences of words from context, enabling them to perform various NLP tasks, such as translation, summarization, question answering, and content generation. However, the growing size and complexity of developing, training, and deploying advanced LLMs require extensive computational resources and large datasets. This creates a barrier for users. As a result, platforms that host models and datasets are widely used. For example, Hugging Face, one of the most popular platforms, hosted 1.8 million models and 450K datasets by June 2025, with no sign of slowing down. Since many LLMs are built from base models, pre-trained models, and external datasets, they can inherit vulnerabilities, biases, or malicious components from earlier models or datasets. Therefore, it is critical to understand the origin and development of these components to better detect potential risks, improve model fairness, and ensure compliance. Motivated by this, our project aims to study the relationships between models and datasets, which are core components of the LLM supply chain. First, we design a method to systematically collect LLM supply chain data. Using this data, we build a directed heterogeneous graph to model the relationships between models and datasets, resulting in a structure with 397,376 nodes and 453,469 edges. We then perform various analyses and uncover several findings, such as: (i) the LLM supply chain graph is large, sparse, and follows a power-law degree distribution; (ii) it features a densely connected core and a fragmented periphery; (iii) datasets play pivotal roles in training; (iv) strong interdependence exists between models and datasets; and (v) the graph is dynamic, with daily updates reflecting the ecosystem's ongoing evolution.

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