Eleven Pulitzer Prize winners have filed a lawsuit against OpenAI and Microsoft in federal court in Manhattan, accusing them of misusing their works to train large models like ChatGPT. The lawsuit seeks monetary compensation and an injunction to stop the infringement, continuing from previous legal actions, with Microsoft being named as a defendant for the first time. The era of AI large models has raised copyright issues, with ten infringement cases already accepted by the Northern District of California since November. The traditional copyright model is becoming ineffective in the AI era, as training large models involves numerous works with complex ownership, and solutions are still under discussion.