AI Research Teams Launch MIRA, 5B-Parameter Open-Source World Model for Real-Time Multi-Player Game Simulation

According to Beating (a monitoring platform), AI research institutes General Intuition and Kyutai, alongside Epic Games, launched MIRA, an open-source multi-player interactive world model. The 5-billion-parameter generative game simulator can run real-time 2v2 Rocket League matches without requiring physics engines, rendering engines, or explicit 3D representations, using only historical video frames and player inputs. The model employs frozen DINOv3-L visual encoder representations to stabilize latent state predictions and mitigate long-horizon drift and divergence. Training data includes approximately 1,000 hours of gameplay with 4,000 cumulative hours of multi-camera video footage, action sequences, and physics states; the full model was trained on roughly 10,000 hours of clean match data.
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