Fenix Flexin admits AI created hit 'Rubberz

LA rapper Fenix Flexin has finally confirmed using AI to create his hit “Rubberz,” ending weeks of denials after producer Medasin publicly claimed the track was made with an artificial intelligence tool.

Medasin posted side-by-side videos showing how Treblo—formerly called Sonauto—was used to generate the song’s vocals and arrangement. Treblo then released an AI-detector that flags “Rubberz” as synthetic, piling pressure on Flexin to respond. On social media and in interviews, Flexin now says he worked with Medasin and the AI platform, calling it part of his creative process rather than a secret.

The admission matters because “Rubberz” became an underground hit on TikTok and streaming services, racking up millions of streams without listeners knowing AI shaped the final sound. The case spotlights how quickly AI music tools are moving from experiment to mainstream, and how artists can monetize AI outputs without disclosing their use. Streaming platforms have no rules forcing disclosure, so fans often hear AI tracks without context.

Experts warn this could trigger a wave of AI-generated hits flooding playlists, making it harder for listeners to tell real from synthetic. Treblo says it’s updating its detector to catch more AI songs, while Flexin’s team argues AI tools are just another instrument—like a synth—so disclosure should be the artist’s choice. The next step is likely a debate over labeling on streaming services, which could reshape how AI music is discovered and trusted.