Treblo's AI Detection Tool Flags Fenix Flexin's 'Rubberz' as Likely AI-Generated

The Detection Claim

Treblo, an AI music generation platform, released an open-source classifier tool on Monday designed to identify when songs were created using its model. According to The Verge, the tool flagged Fenix Flexin’s chart-topping track “Rubberz” as having been “very likely” generated by Treblo with “high confidence.” Treblo CEO Ryan Tremblay told The Verge the classifier returned “a very high probability score for Rubberz, indicating the released audio was generated almost entirely by our model,” potentially making it the first AI-generated song to reach the Billboard Hot 100.

The Treblo AI Music Classifier reports a false positive rate below 1 in 1,000, according to the company’s blog post announcement. While this error rate is relatively low, Treblo acknowledges the finding is not conclusive proof—the tool can only detect its own model’s output, not other AI music generation systems.

The Mounting Pressure on Authenticity Claims

Musician Medasin had previously expressed confidence that “Rubberz” was generated using Treblo specifically, according to The Verge. Medasin later claimed in an Instagram story (since expired) that Fenix used an AI stem separator to fabricate the production session, The Verge reports, citing reporting from Stereogum. This allegation adds weight to skepticism about the track’s creation method.

Fenix Flexin has maintained that “Rubberz” was produced authentically and posted video clips purporting to show project files from the recording session. However, The Verge notes these low-resolution videos have done little to counter the AI-generation allegations. Fenix did not immediately respond to The Verge’s request for comment.

Why This Matters

The potential confirmation that a Billboard Hot 100 song was generated using AI without public disclosure raises urgent questions about artistic integrity, consumer expectations, and industry accountability. If “Rubberz” is indeed AI-generated, it signals that generative music tools have reached chart-viability without transparent labeling—a precedent that could reshape how the music industry defines authorship and authenticity. For platforms like Treblo, the detection capability could become a standard for verification, though the technical and ethical implications of automated AI-content policing in commercial music remain unresolved. Artists and labels now face pressure to clarify their use of generative tools, or risk similar scrutiny.