I Asked Two AIs to Build a Guitar. Now I Want to See What You Do With It.

Six words. Two models. One interactive fretboard. And a wide open challenge. I typed six words into a duel on VibeCode Arena. "Design a guitar with all the key notes represented on strings." That was it. No extra context. No design specs. No colour palette. No instructions about interactivity or layout or what clicking a note should do. Just six words. And then I watched two AI models interpret them completely on their own. What came back genuinely surprised me. What actually happened Both models built something called an Interactive Guitar Fretboard. All twelve notes laid out across the top. C, C#, D, D#, E, F, F#, G, G#, A, A#, B. Six strings running horizontally. Click a note and green highlights appear showing its positions across the fretboard. Not what I expected from six words. But here is where I have to be honest, because this is the part that actually makes it an interesting challenge. When I clicked A# the interaction worked. A# lit up in multiple positions across all six st