DeGenTWeb: A First Look at LLM-dominant Websites

Fuente: arXiv
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Auteurs principaux: He, Sichang Steven, Ardi, Calvin, Govindan, Ramesh, Madhyastha, Harsha V.
Format: Preprint
Publié: 2026
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author He, Sichang Steven
Ardi, Calvin
Govindan, Ramesh
Madhyastha, Harsha V.
author_facet He, Sichang Steven
Ardi, Calvin
Govindan, Ramesh
Madhyastha, Harsha V.
contents Many recent news reports have claimed that content generated by large language models (LLMs) is taking over the web. However, these claims are typically not based on a representative sample of the web and the methodology underlying them is often opaque. Moreover, when aiming to minimize the chances of falsely attributing human-authored content to LLMs, we find that detectors of LLM-generated text perform much worse than advertised. Consequently, we lack an understanding of the true prevalence and characteristics of LLM content on the web. We describe DeGenTWeb which systematically identifies LLM-dominant websites: sites whose content has been generated using LLMs with little human input. We show how to adapt detectors of LLM-generated text for use on web pages, and how to aggregate detection results from multiple pages on a site for accurate site-level categorization. Using DeGenTWeb, we find that LLM-dominant sites are highly prevalent both in data from Common Crawl and in Bing's search results, and that this share is growing over time. We also show that continuing to accurately identify such sites appears challenging given the capabilities of the latest LLMs.
format Preprint
id arxiv_https___arxiv_org_abs_2605_00087
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle DeGenTWeb: A First Look at LLM-dominant Websites
He, Sichang Steven
Ardi, Calvin
Govindan, Ramesh
Madhyastha, Harsha V.
Networking and Internet Architecture
Artificial Intelligence
Computers and Society
Information Retrieval
Machine Learning
Many recent news reports have claimed that content generated by large language models (LLMs) is taking over the web. However, these claims are typically not based on a representative sample of the web and the methodology underlying them is often opaque. Moreover, when aiming to minimize the chances of falsely attributing human-authored content to LLMs, we find that detectors of LLM-generated text perform much worse than advertised. Consequently, we lack an understanding of the true prevalence and characteristics of LLM content on the web. We describe DeGenTWeb which systematically identifies LLM-dominant websites: sites whose content has been generated using LLMs with little human input. We show how to adapt detectors of LLM-generated text for use on web pages, and how to aggregate detection results from multiple pages on a site for accurate site-level categorization. Using DeGenTWeb, we find that LLM-dominant sites are highly prevalent both in data from Common Crawl and in Bing's search results, and that this share is growing over time. We also show that continuing to accurately identify such sites appears challenging given the capabilities of the latest LLMs.
title DeGenTWeb: A First Look at LLM-dominant Websites
topic Networking and Internet Architecture
Artificial Intelligence
Computers and Society
Information Retrieval
Machine Learning
url https://arxiv.org/abs/2605.00087