HTML Opus #21
7.5
Evaluation
7.5 avg
7.5 physics accuracy
8 design quality
7.5 animation quality
8 slider ux
6.5 completeness
7.2 overall
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

Live mass, volume, and density values are static hardcoded HTML (not dynamically updated), so only displaced water and buoyancy respond to the slider; all other physics-derived live readouts fail the "live value" criterion.

11,409 output tokens · claude-opus-4-6 · end_turn

Live mass, volume, and density values are static hardcoded HTML (not dynamically updated), so only displaced water and buoyancy respond to the slider; all other physics-derived live readouts fail the "live value" criterion.