Suno Users Revolt Over v6 Model Built on Licensed Training Data

Licensed Data Fuels Quality Complaints

When Suno rolled out its v6 suite this month and retired previous models, CEO Mikey Shulman called the new generation "faster, more expressive and higher quality" in a blog post. The model was built entirely from scratch using licensed training data from landmark deals with Warner Music Group, BMG and Believe, a shift prompted by Warner's November 2025 settlement with the company.

Chief Product Officer Jack Brody confirmed the model "was trained entirely from scratch, from the ground up" on "data that is different from the data that the previous models were trained on." That difference, according to users, is the problem.

Community Forums Erupt with Criticism

The r/SunoAI subreddit has become a gathering point for frustrated subscribers. A thread titled "Bye bye Suno, I'm cancelling my subscription" has drawn hundreds of heated comments. One user summarized the sentiment bluntly: "They actually made a perfect slop machine."

A second thread, "v6 is garbage and a joke," raised specific technical concerns about muffled audio and distorted, poorly mixed vocals. One commenter called it "100% utter trash" and potentially "the worst model since v4."

Mounting Legal Pressure

The user backlash compounds Suno's legal troubles. Warner, Universal and Sony sued the company in June 2024 over allegations it trained models on copyrighted music without permission. Universal and Sony remain in active litigation. A July investigative report by 404 Media claimed Suno ingested more than two million individual clips from YouTube alone.

A data breach exposed the personal information of 55.3 million users, according to Have I Been Pwned, and triggered a class action lawsuit alleging the company prioritized profit over data protection. Suno admitted in a September court filing that it obtained audio data from YouTube for training, though its attorneys defended the practice as "quintessential fair use," Music Business Worldwide reported. A German court found Suno liable for copyright infringement in a case brought by performance rights organization GEMA.

The company characterized the v6 release as illustrating how AI and the music industry can "strengthen one another," but its own user base is pushing back on that vision.