AI Writes Entire 3D Game Engine Overnight in Bend2, Hitting 120 FPS

rickasaurus · x · 2026-09-11

Victor Tahl shared a demo where Astra built a full 3D game engine from scratch in Bend2 — a language with no game engine, no 2D graphics, not even fonts. The model finished the entire engine overnight and it runs at 120 FPS. Asked how models handle Bend despite it being absent from training data, Tahl says the honest answer is that modern models are "deep RL fried in Lean," the same recipe behind millennium-problem breakthroughs.

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