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AI Authorship Dominates Over One-Third of New Web Pages, Study Finds

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Pew Research's New Study Reveals:

  • Key Finding: Over one-third of newly published web pages show signs of being written or heavily edited by AI post-ChatGPT release.
  • Data Source: The study used the Common Crawl web archive, analyzing nearly half a million English-language web pages spanning a period starting before ChatGPT's debut in November 2022.
  • Methodology: Employed Open Pangram's AI detection tools to determine authorship characteristics.
  • Significant Discovery: In a July 2026 sample, 10% of analyzed web pages indicated strong AI authorship. Removing older web pages, over 35% of the newer ones demonstrated AI authorship.
  • Domain-Specific Findings: .com domains exhibited AI authorship at a rate ten times higher compared to .edu or .gov domains, which stood at around 1%. .org domains had a 4.6% rate.
  • Challenges: Acknowledged potential inaccuracies with AI detection tools, but views the data as directionally credible.
  • Additional Indicators: Increased use of specific linguistic patterns, such as em dashes and Oxford commas, were identified as signs of AI involvement.

The report signifies a fundamental shift in content creation dynamics on the internet, suggesting a growing proliferation of AI-written content.