Anthropic

Is it legal to train AI models on copyrighted books? Courts say it’s complicated. This guide walks through the $1.5 billion Anthropic settlement and its 91% claim rate, the fair use four-factor test, the scoreboard of rulings from Bartz v. Anthropic to Kadrey v. Meta and Thomson Reuters v. Ross, why the UK’s March 2026 report kept the status quo after Getty’s hollow High Court win, what the US Copyright Office’s Part 3 report concluded before its author was fired and reinstated, and the practical questions every business using or building AI should be asking about indemnities, provenance and output ownership.