Generative AI is a powerful tool for expression and knowledge. In our amicus brief to the Ninth Circuit in Bartz v. Anthropic, NetChoice is urging the court to accept Anthropic's appeal. The District Court's ruling in this case could chill the development of generative AI services, which millions of users rely on to create their own expression and access information. The Court should consider the novel legal issues in this case now, the brief argues.