What data is your AI trained on? xAI doesn't want you to know

xAI sued California over the state's AI training data transparency law, AB 2013, and after losing its request to block enforcement at the trial level, has appealed to the Ninth Circuit, arguing the disclosure requirements violate its First Amendment rights. The law only requires developers to publish documents summarizing their training datasets; it does not involve source code, model weights, or trade secrets. The author's institution, along with 18 other child safety, consumer protection, and AI accountability organizations and 9 scholars, filed an amicus brief supporting the law. The author says this is the first challenge to AI industry transparency legislation; if xAI prevails, it could become a template for challenging state AI transparency laws, including SB 53, New York's RAISE Act, and Illinois SB 315.