The AI Company Behind a Suspected AI Song Just Confirmed Fans’ Suspicions

The creators of Treblo, a generative AI music app, flagged rapper Fenix Flexin’s viral hit “Rubberz” as likely AI-generated this week — a development that reignited months of speculation and arrived from the one source with genuine technical standing to make that call. “Rubberz,” a synth-pop and new wave-inflected track released June 5, 2026 through Empire Distribution, became one of the most talked-about songs of the summer, climbing to number 58 on the Billboard Hot 100 with more than 7.5 million YouTube views. Suspicion that the track was AI-generated began almost immediately after release, with hip-hop producer and artist Curtiss King spending 30 minutes dissecting the track on YouTube, arguing “you can smell the wires on it” due to digital artifacting patterns consistent with AI-generated instrumentation, according to Euronews’ coverage of this week’s development. The specific claim that changed the conversation Artist and producer Medasin previously published a detailed viral breakdown alleging “Rubberz” was fully AI-generated using Sonauto, an AI music platform that rebranded to Treblo just two days before the song’s release. As supporting evidence, Medasin demonstrated that entering “Eminem” as a prompt tag into the tool, instead of “Fenix Flexin,” produced strikingly similar lyrical patterns — suggesting the song’s structure matched a generation template rather than an original composition. Fenix Flexin briefly posted what he described as Pro Tools project files as evidence of the song’s human creation, then deleted the post shortly afterward. Why Treblo’s own flag carries more weight than fan speculation Songwriter Charlie Harding told The Verge that most generative AI music companies train on low-quality, unlicensed MP3s of copyrighted material, which tends to produce the kind of audibly degraded instrumentation critics identified in “Rubberz” — technical fingerprints ordinary listeners can learn to recognize, but that the tool’s own creators are positioned to identify with far more confidence than outside critics working from ear alone. Fenix Flexin and producer Purps on the Beat have consistently denied AI involvement throughout the controversy, with Purps separately arguing that AI is simply a tool no different from Auto-Tune. Why this dispute matters beyond one song The controversy sits at the center of a genuinely unresolved question the music industry hasn’t settled: whether AI-assisted or AI-generated tracks should be disclosed to listeners, and what obligation platforms or artists have to do so. “Rubberz” becoming a legitimate commercial and chart hit — regardless of how it was actually made — demonstrates that audiences will embrace a song on its merits well before any AI-origin question gets resolved, a dynamic that will likely repeat as AI music tools keep improving and disclosure norms remain informal rather than mandated. What to watch next Whether Treblo or its creators issue a more formal, technical confirmation beyond the initial flag.