A class-action lawsuit has been filed against AI company Anthropic by authors Andrea Bartz, Charles Graeber, and Kirk Wallace Johnson, who allege that the company misused their copyrighted works to train its chatbot, Claude. The lawsuit claims Anthropic has built a multibillion-dollar business by using pirated versions of copyrighted books without permission or compensation, effectively 'strip-mining' creative works. This legal action is part of a broader trend, as various authors and artists are increasingly challenging AI firms over copyright infringement issues related to model training. Anthropic is already facing another lawsuit from music publishers regarding similar allegations of copyright violations. The company has not yet commented on this specific lawsuit but is reportedly using a 'fair use' defense in its ongoing legal battles. The authors seek monetary damages and a court order to prevent Anthropic from continuing to misuse their works.