Anthropic has defended its use of song lyrics to train its AI chatbot, Claude, arguing that such training is transformative. Universal Music Group (UMG) and other music companies had argued that Anthropic's use of its intellectual property was not fair use, a legal tenet that excludes "transformative" uses of a work from copyright protection. Anthropic argues that Claude's training can be used in various beneficial ways, including code, research, and writing. The dispute over fair use is an unsettled legal issue that has led to numerous ongoing copyright cases against tech companies.