A US federal judge has denied a request by Universal Music Group and other publishers to block AI firm Anthropic from using copyrighted song lyrics to train its chatbot, Claude.

Judge Eumi Lee ruled that the publishers failed to prove Anthropic's actions caused them 'irreparable harm' and said their request was too broad. The lawsuit, filed in 2023, accuses Anthropic of infringing on lyrics from at least 500 songs by artists such as Beyonce and the Rolling Stones without permission.

The case is part of a wider debate over AI training and copyright law, with companies like OpenAI and Meta arguing that their use of copyrighted material falls under 'fair use.'

Publishers claim that Anthropic's actions threaten the licensing market for lyrics, but the court ruled that defining such a market is premature while fair use remains unresolved.

Lee's decision did not address whether AI training with copyrighted works constitutes fair use, leaving that question open for future legal battles.

Anthropic welcomed the ruling, calling the publishers' request 'disruptive and amorphous,' while the publishers remain confident in their broader case against the AI company.

The lawsuit highlights the growing tension between content creators and AI firms as courts and lawmakers grapple with the legal and ethical implications of training AI on copyrighted material.