— Two crowns — Same mass, different density — Vertical slider ✓ Slider works — Slider controls crowns — Slider direction correct — Full slider range — Fall animation ✓ Water displacement ✓ Rising water level — Splash effects ✓ Physics correct — Live mass value ✓ Live volume value — Live density value ✓ Live displaced water — Gilded displaces more — Heureka animation ✓ No external deps — Light bg / dark text ✓ Self-contained HTML
Competent general Archimedes simulator with correct physics and smooth animations, but completely misses the prompt's core requirement: two crowns (pure gold vs. gilded), same-mass comparison, vertical submersion slider, fall animation, splash effects, Heureka moment, and a light background.
9,595 output tokens · claude-opus-4-6 · end_turn
Competent general Archimedes simulator with correct physics and smooth animations, but completely misses the prompt's core requirement: two crowns (pure gold vs. gilded), same-mass comparison, vertical submersion slider, fall animation, splash effects, Heureka moment, and a light background.