US Judge sides with AI firm Anthropic over copyright issue
The BBC is also considering legal action over the unauthorised use of its content.
In response to the legal battles, some AI companies have responded by striking deals with creators of the original materials, or their publishers, to license material for use.
Judge Alsup allowed Anthropic's "fair use" defence, paving the way for future legal judgements.
However, he said Anthropic had violated the authors' rights by saving pirated copies of their books as part of a "central library of all the books in the world".
In a statement Anthropic said it was pleased by the judge's recognition that its use of the works was transformative, but disagreed with the decision to hold a trial about how some of the books were obtained and used.
The company said it remained confident in its case, and was evaluating its options.
A lawyer for the authors declined to comment.
