Pew Research: 1 in 10 Webpages Show Signs of AI Authorship

The Pew Research Center's Data Labs team scanned nearly half a million webpages through an AI detector and identified signs of AI authorship or editing on approximately 10% of pages studied. Among pages published after ChatGPT's November 2022 launch, that figure climbed to 35%. Commercial domains (.com) showed the highest prevalence at 9.35% on average, compared to 4.59% for .org, 1.03% for .edu, and 0.76% for .gov—a stark contrast to pre-ChatGPT baselines, when all domain types hovered at or below 1%. Pew's analysis also tracked stylistic markers common in AI text, including increased em dashes, Oxford commas, and phrases like "delve" and "interplay," though the research notes no single marker can identify AI authorship in individual documents—only aggregate patterns across large text samples.