Pew finds a third of post-ChatGPT webpages show AI authorship
Pew Research analyzed almost 500,000 English-language pages from the Common Crawl archive using the Open Pangram detection tool, finding 10% of a July 2026 sample showed significant signs of AI authorship overall — rising to over one-third (35%) among pages published after ChatGPT’s November 2022 launch. Commercial (.com) domains showed AI-authorship signs at roughly 10 times the rate of .edu or .gov domains (both near 1%), with .org domains at 4.6%.
Why it matters: A rising share of the web that AI answer engines themselves crawl and cite is now AI-written, a feedback loop worth tracking as engines increasingly train on and retrieve from their own output.
The record: ChatGPT
Via TechCrunch AI ↗ · Pew Research ↗
Posted to the wire August 20, 2026.