Software giant Adobe is facing a proposed class-action lawsuit alleging that it illegally used copyrighted pirated books in training its artificial intelligence models.

Elizabeth Lyon, an author from Oregon, filed the lawsuit on behalf of the affected group, claiming that Adobe used a pirated book dataset that included her work when developing its lightweight language model called SlimLM.

The lawsuit states that SlimLM was pre-trained on the open-source dataset SlimPajama-627B. This dataset is accused of containing the notorious Books3 subset, which includes about 191,000 unauthorized e-books.

Adobe is not the only one affected. Previously, companies such as Apple, Salesforce, and Anthropic have also been involved in legal disputes over using RedPajama or similar datasets containing Books3 content.Model Usage: The alleged SlimLM model is mainly optimized for document assistance tasks on mobile devices.

At this time, Adobe has not made an official comment on the lawsuit. As AI technology is widely applied, legal battles over the compliance of training data are becoming a key turning point in the industry.