Rapper Fenix Flexin Admits AI Role in “Rubberz” After Treblo Detector Flags It

LA rapper Fenix Flexin has effectively stopped denying that AI was used to create his 80s synth pop-styled song "Rubberz." In an Instagram comment, Fenix wrote that he never claimed AI was uninvolved, only that it had nothing to do with the recording process, and that he did not know the app's name until the mixing stage. The admission follows videos by producer Medasin alleging the song was built with Treblo (an AI music tool formerly called Sonauto), and Treblo itself releasing a detector that flagged the track as its own output.

What happened

LA rapper Fenix Flexin is no longer pushing back on claims that his song “Rubberz,” an 80s synth pop-styled track, was created using AI. In a reply on Instagram to a comment referencing rapper Tyga, who admitted to using AI on his own retro-themed album $tarface, Fenix wrote: “never said I didn’t use AI, i said it had nun to do w recording process. I didn’t even know what da app was till we mixed.”

That comment amounts to a confirmation that AI was part of the production, even if Fenix frames his personal involvement as limited to the mixing stage.

How the story broke

Producer Medasin posted videos claiming that a tool called Treblo was used to generate the song. Treblo, which was previously named Sonauto, is an AI music generation platform. After Medasin went public, Treblo itself released an AI content detector and used it to identify “Rubberz” as output from its own platform. That one-two punch made it difficult for Fenix to maintain a full denial.

The cover art for “Rubberz” has also been described as almost certainly AI-generated, though that detail was not the main point of dispute.

Why does this matter beyond one song?

This is a pattern now. Two rappers, Fenix Flexin and Tyga, both released 80s-influenced tracks or albums recently, both faced public accusations of heavy AI involvement, and both have now acknowledged it to some degree. The music industry has watched this controversy build, and it raises a real question about disclosure: should listeners be told upfront when AI generated the core of a track?

For businesses and creators outside music, the parallel is direct. AI-generated content is becoming easier to detect, and detector tools are improving fast. Treblo building and deploying its own detector to confirm its outputs are in the wild is a notable move. It signals that AI platforms themselves may become part of the attribution chain, whether artists want that or not.

This also connects to a broader tension in AI content policy. As we covered with Suno’s decision to watermark all AI music outputs under pressure from streaming platforms, the infrastructure for tracing AI-generated audio back to its source is being built right now, from multiple directions.

Our take

The interesting part here is not that a rapper used AI. It is that Treblo’s own detector outed the track. That means AI platforms now carry latent attribution capability, and that capability can be activated publicly at any time. If you are a brand, agency, or creator using AI-generated audio, images, or video, assume the originating platform can identify its own outputs. Denial becomes a losing strategy the moment the vendor decides to speak up.

For anyone thinking about how AI fits into their content production, it is worth building disclosure habits now rather than being forced into them later. If you want help thinking through how AI tools fit into your workflow responsibly, our AI integration services start from that question.

Source: The Verge · AI