35% of New Web Pages Since ChatGPT Are AI-Written

A Pew Research Center study reveals that 10% of English-language webpages show significant signs of being written by AI, with this figure rising to 35% for pages published since ChatGPT's launch in November 2022. Researchers analyzed approximately 490,000 pages from the Common Crawl web archive, covering January 2021 to July 2026, using the Open Pangram AI detection model. AI authorship is notably more prevalent on .com domains, which exhibit AI characteristics at about 10 times the rate of .edu or .gov domains, both near 1%, and double the 4.6% rate on .org sites. The study highlights that certain linguistic patterns have increased since 2023, including a 63% rise in Oxford commas and a doubling of AI-preferred words like 'delve' and 'interplay.' The model identifies statistical patterns rather than specific words, though it can misclassify pages. AI-assisted text is common, and detection may improve as AI companies develop better identification technologies. The .com AI-authorship rate has surged from roughly 1% in January 2021 to 9.35% by January 2026.

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