AI · Decrypt
A Third of the Post-ChatGPT Web Is AI-Written, Pew Flags
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★ Tier-1 Source
AI-written content is everywhere, literally.
Key facts
- The findings come after researchers pulled roughly 490,000 pages from the Common Crawl web archive, spanning January 2021 through July 2026, then ran the text through Open Pangram, an AI detection
- At scale, the trend line is steep regardless: The.com AI-authorship rate climbed from roughly 1% in January 2021 to 9.35% five years later, in January 2026 alone
- Open Pangram comes from Pangram Labs, whose detector has also turned up in separate research finding AI-generated text in roughly 9% of U.S. newspaper articles this year, including opinion pages
- One in 10 English-language webpages now shows significant signs of being written by AI, according to a Pew Research Center study published Thursday
Summary
Pew Research analyzed roughly 490,000 English-language webpages via the Common Crawl archive; 10% of a July 2026 snapshot show significant signs of AI authorship. Restricted to pages published after ChatGPT's November 2022 launch, that figure jumps to 35%. ".com" domains show AI-authorship signs at roughly 10 times the rate of ".edu" or ".gov" domains, and about double the rate of ".org. One in 10 English-language webpages now shows significant signs of being written by AI, according to a Pew Research Center study published Thursday.