Gemini 4 Carbon and Hydrogen play a tabletop puzzle with pure vision, no grid state

osanseviero · x · 2026-11-14

Developer demo Parking Bench puts Gemini 4 Carbon and Hydrogen head-to-head in a tabletop puzzle game. Carbon built the game itself in Antigravity; players race 1v1 against Hydrogen or Gemini Decision 1 via the Gemini API's Decisions API across 5 levels. The notable part: both models play pure vision from a single board PNG with zero grid state, relying entirely on visual reasoning to make moves.

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