Runway releases Praxis-1 with open weights under Apache 2.0

Runway released Praxis-1, its world action model for robots, to everyone with open weights under the Apache 2.0 license.

Praxis-1 was introduced in September and had been running with launch partners Noble Machines, Standard Bots and Ultra on a legged humanoid, a six-axis industrial arm and a dual-arm warehouse robot. It's a 27B-parameter model that predicts video and actions together, built on the same large-scale video pretraining as Runway's general world models.

The release covers the weights plus the inference and fine-tuning code, with full fine-tuning and LoRA both supported, and commercial use is allowed. You can get it on GitHub and on Hugging Face with native LeRobot support, run it in vLLM-Omni, or use hosted inference on Reactor. Runway says it runs on NVIDIA hardware from data center GPUs such as the H100 and B200 to RTX 5090 workstations and Jetson Thor on the robot itself.

Runway calls the model state of the art and reports 46.2% success across 1,200 episodes on NVIDIA's RoboLab-120 leaderboard, ahead of FLUX 3 Action at 42.9%, Cosmos3 Nano at 36.8% and π0.5 at 28.0%.