Sure seems like Fenix Flexin used AI music generator Treblo

<figure> <img alt="The seemingly AI generated cover art for Fenix Flexin’s Rubberz." data-caption="And you thought we were done with this one… | Image: Fenix Flexin" data-portal-copyright="Image: Fenix Flexin" data-has-syndication-rights="1" src="https://platform.theverge.com/wp-content/uploads/sites/2/2026/08/artworks-WsdIgVXV8NOV-0-t1080x1080.jpg?quality=90&#038;strip=all&#038;crop=0,0,100,100" /> <figcaption> And you thought we were done with this one… | Image: Fenix Flexin </figcaption> </figure> <p class="wp-block-paragraph">We were pretty sure that <a href="https://www.theverge.com/ai-artificial-intelligence/974209/fenix-flexin-billboard-hot-100-rubberz-ai-slop">Fenix Flexin's "Rubberz"</a> was made using AI, but musician <a href="https://www.instagram.com/p/Dbbf1vCBuGO/">Medasin</a> was confident that it was made using Treblo specifically. Now the company and a new <a href="https://treblo.com/detect">detection tool</a> seem to confirm it.</p> <p class="wp-block-paragraph">On Monday, the company announced the open-source <a href="https://treblo.com/blog/treblo-ai-music-classifier">Treblo AI Music Classifier</a>, which detects when a song was generated using Treblo, though not other AI tools. According to a blog post, it has a false positive rate of less than 1 in 1,000. That's not unimpeachable, but it's notable that the company's own Classifier determined that "Rubberz" was "very likely Treblo" with "high confidence," adding more fuel to the PR nightmare for Fenix. </p> … <p><a href="https://www.theverge.com/ai-artificial-intelligence/975528/fenix-flexin-ai-music-generator-treblo">Read the full story at The Verge.</a></p>