News · Runway · 2 min read
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Runway releases Praxis-1, an open-weight robotics world-action model
Runway released Praxis-1, a 27B-parameter open-weight model that jointly predicts video and robot actions, topping NVIDIA's RoboLab-120 leaderboard with launch hardware and robotics partners.
Runway released Praxis-1, a 27B-parameter open-weight model for robotics, on November 11, 2026, according to Runway's announcement. The model jointly predicts video and robot actions and currently tops NVIDIA's RoboLab-120 leaderboard.
Key specs and benchmark results
- Praxis-1 is a 27B-parameter mixture-of-experts diffusion transformer that predicts video and robot actions jointly.
- It tops NVIDIA's RoboLab-120 leaderboard with a 46.2% success rate over 1,200 episodes, ahead of FLUX 3 Action (42.9%), Cosmos3 Nano (36.8%) and pi-0.5 (28.0%).
- Fine-tuned on Google's RT-1 robot, it reaches 80.0% success on SimplerEnv, versus 52.4% for the original RT-1.
- It ships open-weight under the Apache 2.0 license, permitting commercial use, and is available on GitHub and Hugging Face with native LeRobot support.
- Hosted inference is available through Runway's
Reactorservice, supporting full fine-tuning and LoRA adaptation. - Hardware compatibility spans NVIDIA H100 and B200 data-center GPUs, RTX 5090 and RTX PRO 6000 workstation GPUs, and Jetson Thor edge hardware.
What it means for people building with AI
The release marks Runway's pivot from pure media generation into open-weight embodied-AI foundation models. Because Praxis-1 is directly usable and fine-tunable through GitHub and Hugging Face, robotics developers can adapt it to their own hardware and compare it against existing open baselines using the published RoboLab-120 and SimplerEnv results.
Availability and launch partners
Praxis-1 is available now on GitHub and Hugging Face with native LeRobot support, and hosted inference runs through Runway's Reactor service. Launch partners include Noble Machines (legged humanoid), Standard Bots (six-axis industrial arm) and Ultra (dual-arm warehouse robot).
Sources
- Praxis-1 Is Now Available (Runway, November 11, 2026, official)
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