1/3 of web pages since ChatGPT show AI authorship signs

Pew's analysis focuses on the content side of the web rather than web traffic patterns. While Cloudflare's recent report highlighted how bot traffic has now overtaken human traffic, this new study measures what is actually being published: the authorship origin of web pages themselves. The two trends together paint a picture of automated content creation and consumption becoming dominant on the internet.

When Pew first looked at a random sample of 10,000 pages collected in July 2026, around 10% showed significant signs of AI authorship. However, that sample inevitably included older pages published before AI writing tools existed, which skewed the figure downward. By filtering to only pages published after ChatGPT's launch in November 2022, Pew found the proportion jumped dramatically to over one-third (35%), revealing how rapidly AI content generation has reshaped the newer web. The variation across domain types is striking: commercial sites (.com) embrace AI-written content at far higher rates (around 10%) than educational (.edu) or government (.gov) sites (both around 1%), suggesting different institutional attitudes toward AI authorship. Pew acknowledged that detection tools like Pangram can misclassify non-AI content, but argued the broad pattern is likely directionally correct when measured at scale.