Runway open-sources Praxis-1, a 27B MoE video-action model that ranks #1 on RoboLab-120

runwayml · x · 2026-11-13

What it is: Runway's Praxis-1 is an open-weight world action model built from a 27B-parameter mixture-of-experts diffusion transformer that jointly predicts video and actions, turning the company's video pretraining into real robot control.
Results: Ranks #1 among world action models and all open-source robot foundation models on NVIDIA's RoboLab-120 leaderboard; competitive success rates on real-world Franka tasks vs. state-of-the-art policy models.
Capabilities: Controls a bimanual YAM robot and a single Franka arm on contact-rich everyday tasks (upside-down mug placement, box packing, bottle cleanup); adapts quickly to new robots and can be fine-tuned on a low-cost SO-101.
Deployment: Built on thousands of LeRobot community datasets, runs on a single RTX 5090 with NVFP4; checkpoint and setup instructions are available.

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