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Stanford study finds 35% of new websites AI-generated by May 2025

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Why it matters

A collaborative study by Stanford University, Imperial College London, and the Internet Archive has quantified the rapid proliferation of AI-generated content online. Analyzing web pages from 2022 through May 2025 using the Wayback Machine and AI-detection methods, researchers found that 35.3% of newly published websites were AI-generated or AI-assisted, with 17.6% fully AI-generated. Stanford AI researcher Jonáš Doležal characterized the speed of this shift as "staggering" in recent interviews.

The study tested six hypotheses about AI content's effects on web quality. It confirmed two: semantic contraction, meaning reduced diversity of viewpoints, and a positivity shift toward more sanitized, cheerful language. The researchers found no evidence supporting concerns about rambling text, generic style, missing citations, or increased misinformation. The full scope of the study's methodology and additional findings remain under review.

The findings validate elements of the "dead internet" theory, which emerged around 2016 and posits that bot and AI dominance erodes authentic human interaction. Recent data supports the underlying concern: Cloudflare reported that nearly a third of web traffic now originates from bots, while Imperva documented automated traffic surpassing human traffic in 2024. For attorneys tracking AI liability, content authenticity, and platform governance issues, the study's continuous monitoring tool—which researchers plan to deploy—will provide ongoing benchmarks for how AI-generated content reshapes the information landscape.

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