Same prompt, same game: Sonnet 5.5 makes it run, Opus 5.5 makes you keep playing

victor_explore · x · 2026-09-29

A user gave two models the same prompt to build a game: Sonnet 5.5's version "runs", while Opus 5.5's version is something they "wanted to keep playing" — a vivid demo of the quality gap between tiers of the same model family in creative coding.

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