Unlabeled model builds an interactive mechanical butterfly in Three.js
An unlabeled model produced "Papilio Mechanica," a rotatable, zoomable mechanical butterfly demo with exploded views and material swaps, and the author notes the mystery Arena checkpoint appears under the gemini-3.8-flash label.
🚨 GEMINI 4 PRO SURPRISES AGAIN, AND THIS TIME IT'S A MECHANICAL BUTTERFLY Prompt was simple: build a beautiful mechanical butterfly in Three.js. What came back isn't a static render. It's a full interactive engineering study, "Papilio Mechanica," brass and blued steel wings built from real mechanical gear clusters, an assembled/exploded toggle, material swaps between azure, gold and obsidian finishes, and hover tooltips that explain individual components. Spec sheet included: 6.2m wingspan, 2.4kg mass, 112° stroke, 2.3Hz beat rate. Orbit, zoom, pan, take flight, all built into the scene itself. This is the same checkpoint pattern we've been tracking, an unlabeled model producing outputs well above what its listed tier should be capable of. Worth being precise here rather than just repeating the claim: the mystery checkpoint people have been catching in Arena has been showing up under the "gemini-3.8-flash" label specifically, not 3.7. Gemini 3.7 Flash is a fully public, already documented GA model with its own model card and benchmarks, so if a source says 3.7, that's worth double checking before repeating it. Either way, the actual output here speaks for itself regardless of which label it was hiding under.
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