Runway open-sources Praxis-1, a 27B world action model topping RoboLab-120 under Apache 2.0
runwayml · x · 2026-11-11
Runway released the weights of Praxis-1, its first world action model, under Apache 2.0 for commercial use. The 27B mixture-of-experts diffusion transformer predicts video and actions jointly and tops NVIDIA's RoboLab-120 leaderboard at 46.2% success over 1,200 episodes, beating FLUX 3 Action (42.9%), Cosmos3 Nano (36.8%), and π0.5 (28.0%). Runway claims it finished tasks 15.6x faster than GPT-6 Astra driving the arm at 51x lower cost per task. Launch partners including Noble Machines, Standard Bots, and Ultra already run it on a legged humanoid, a six-axis industrial arm, and a dual-arm warehouse robot. Weights plus inference and fine-tuning code (full FT and LoRA) are on GitHub and Hugging Face with native LeRobot support, running from H100/B200 down to RTX 5090.
Related event: Runway Open-Sources Praxis-1 World Action Model, Tops RoboLab-120(10 posts)→
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