Fenix Flexin reverses course on AI use in ‘Rubberz’ after denials

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LA rapper Fenix Flexin effectively admitted on August 7, 2026 to using the AI music tool Treblo (formerly Sonauto) on his viral ’80s synth-pop track “Rubberz,” reversing months of public denials.

In a reply to an Instagram comment referencing Tyga’s own admission of AI use on his controversial ’80s-influenced 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 it and erbody started commenting . ain’t nothing wrong w using new technology as a tool keep up w the times or get left behind”
- Fenix Flexin, Instagram

That statement directly contradicts what Fenix told Hot 97’s Mornings With Mero when interviewer Kazeem Famuyide asked about AI use point-blank - Fenix said at the time there was “no AI on it.” The contradiction between the two statements is difficult to reconcile.

The controversy had been building since producer Medasin posted videos claiming Treblo was used to generate the song. Treblo then released its own AI detection tool, which identified “Rubberz” as Treblo-generated content. Fenix and his team had responded aggressively, posting what they described as recording session files, claiming the track was made by two humans in his living room with “pro tools auto tune and some reverb,” and defending clips in which Fenix appeared to be lip-syncing as genuine singing.

The new Instagram comment argues that AI had “nothing to do with the recording process” - a framing that holds only if the song was generated rather than recorded in the conventional sense.

Practitioner takeaway: The episode illustrates a concrete risk for anyone deploying AI-generated audio commercially: detection tools from the generating platform itself can surface later and contradict public statements. Treblo releasing its own detector that flagged its own output suggests AI tool providers are building audit trails - whether by design or in response to disputes. Creators and developers shipping AI-assisted work should assume provenance can be identified and plan disclosure strategies before, not after, a release.

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