Opus 5.5 vs Sonnet 5.5: rebuilding a Three.js flood city demo

The same brief was given to Sonnet 5.5 and Opus 5.5 to build a Three.js flood city animation; Sonnet runs water on CPU while Opus moves it to GPU with 3x cells and a longer valley.

Sara Chen

@sara_kumodeckArchived 8 days agoOriginally posted 2026.10.22

Sara Chen @sara_kumodeckOriginally posted 2026.10.22

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you asked, so i built flood city again with opus 5.5. same brief, same steps. in the video: left is Sonnet 5.5, right is Opus 5.5. sonnet runs the water on the CPU. opus moved it to the GPU, with 3x the cells and a valley twice as long. #ClaudeCode #threejs #vibecoding

x.com/sara_kumodeck/status/2113082200556208397Archived 2026.10.23 10:03

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