Game built by Opus 5.5 syncs real NYC weather—NPCs carry umbrellas in the rain
mattshumer_ · x · 2026-09-26
Matt Shumer shared a demo reportedly built by Opus 5.5: a game whose weather system matches real-time weather in NYC—so during the nor'easter it rains in-game and NPCs carry umbrellas.
The small self-initiated detail is being praised as a charming glimpse of frontier models' creativity when autonomously building apps.
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