Researchers find AI text is making the internet more uniform and weirdly cheerful

A large-scale study of archived English-language web pages found that by mid-2025, about 35% of newly published pages were partly or fully AI-generated.

Researchers said AI-written text is more semantically uniform and more positive in tone than human writing.

Several predicted downstream effects were not supported, and claims of more factual errors were not statistically confirmed.

The findings suggest AI is already shaping the web’s style and diversity, potentially narrowing online discourse and making it more uniformly cheerful.