What happened?
A Stanford Daily report dated October 27, 2026 says Anthropic trained its Claude model on books by Stanford professors. The report alleges the books were obtained illegally.
Why it matters
Large language models are typically trained on text from the web and licensed sources. But pirated book archives, content collected without rights holders' permission and academic publications are frequently part of the debate.
The report does not detail which books, how many, or how they were obtained. It also does not include a statement from Anthropic.
Reactions
The story reached 151 points on Hacker News. The discussion centers on the transparency of AI companies' training-data sources and the limits of copyright.
