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Sure seems like Fenix Flexin used AI music generator Treblo
AI music company Treblo has released an open-source detection tool that appears to confirm suspicions that rapper Fenix Flexin's song "Rubberz" was generated using its AI model, rather than performed and recorded conventionally as he has claimed. This adds fresh weight to allegations that have been dogging Fenix, whose track reached the Billboard Hot 100, and marks the first time an AI music generator's own tools have been used to scrutinise a chart hit in this way.
The Treblo AI Music Classifier, announced on Monday, flags whether a song was made with Treblo specifically and has a claimed false positive rate of under 1 in 1,000. It rated "Rubberz" as "very likely Treblo" with "high confidence," prompting Treblo's CEO to suggest it may be the first AI-generated song to reach the Hot 100. Fenix continues to deny using AI, posting low-quality clips he says show his recording session's project files, but fellow musician Medasin has alleged these were faked using an AI stem separator; Fenix did not respond to a request for comment.
In short
- Treblo's new AI detector flags Fenix Flexin's hit "Rubberz" as "very likely" AI-made
- Treblo CEO says it may be first AI-generated song on the Billboard Hot 100
- Fenix Flexin denies using AI and disputes the allegations
Steelman: both sides, in good faith
The strongest fair case each way — we don't pick a winner.
The case for
Treblo's detection tool is specifically engineered to identify music created with its own AI model, providing unparalleled precision for this exact purpose. With a claimed false positive rate below one in a thousand, the assessment that "Rubberz" was "very likely Treblo" carries substantial weight. Treblo has every reputational incentive to be accurate—a false accusation would damage trust in their system. Fenix's defence appears weakened by credible allegations that his project file evidence could have been artificially generated, leaving his claims of conventional recording unsubstantiated.
The case against
The detection tool originates from Treblo itself, creating a potential conflict of interest; finding their AI reached the Billboard Hot 100 offers significant promotional and validation value. No detection mechanism is perfect, and even a claimed one-in-a-thousand false positive rate leaves room for error, particularly if audio shares characteristics with Treblo-generated music. The allegations that Fenix's evidence was artificially created are themselves unverified. Technical audio analysis is complex and can be misled by similar audio characteristics, and without definitive forensic examination, reasonable doubt exists.
Explained simply
AI music generators create songs from prompts or other inputs, while traditional recording involves people performing, producing and editing audio. Tools that try to identify AI-generated music can offer clues, but their results do not by themselves establish how a song was made.
Fenix Flexin is a rapper whose song “Rubberz” reached the Billboard Hot 100, a US chart of popular songs. He says he recorded it conventionally; Treblo is the company behind an AI music model that has been linked to the track.
The dispute matters because the song’s success has brought questions about how AI-made music is credited and judged alongside human performances. Treblo’s detection tool is designed to identify music made with its own model, so its findings have implications for how much confidence artists, listeners and the music industry place in such tools.
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