Runway releases Praxis-1 weights, with robot-specific adaptation still required
Runway released Praxis-1 weights and adaptation code, opening a joint video-and-action model to researchers who can supply the right robot policy and compute.
Runway released Praxis-1 weights, inference code and fine-tuning code on November 11, following its September model announcement.
The 27-billion-parameter mixture-of-experts model predicts future video and robot actions jointly, allowing researchers to adapt a shared model to a particular robot and task. [1]
The base checkpoint lacks an embodiment-specific action head and cannot operate as a robot policy as downloaded. An action head maps the shared representation to the controls of a particular robot. The repository and base model list Apache 2.0 licensing; dependent components retain their own terms. Downloading gated files requires accepting Hugging Face information-sharing conditions. [2][3][4]
The ordinary quickstart requires a GPU with at least 80 GB of memory. An experimental NVFP4 path targets a 32 GB RTX 5090, but its peak memory has not been measured and its closed-loop behavior remains untested. Those qualifications matter before choosing hardware. [2]
For a robotics lab, the next step is matching a checkpoint and action head to its own equipment, then evaluating closed-loop behavior. The release makes that investigation possible; it does not supply a general-purpose controller.
Take it further
Inspect checkpoints and hardware requirements Standard quickstart≥80 GB GPU; lower-memory NVFP4 path is experimental. Base model requires a robot-specific action head, and weight downloads are gated.
Sources & details 4 sources
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Paste the brief into your voice app to discuss this reporting.Revised 12 November 2026. Revised visual explanations and copy; added Nvidia investigation context and clarified tool eligibility.
Reporting sources
- Runway — Praxis-1 is now available
November 11 weight and code release; joint video/action mechanism and vendor benchmark.
- Runway — Praxis-1 repository
Hardware requirements and experimental NVFP4 route; limits qualify the launch article’s5090 claim.
- Runway — Praxis-1 base model card
Apache 2.0 model metadata; gated files; base checkpoint lacks embodiment-specific action heads.
- Runway — Repository license
Apache 2.0 for this repository; dependency licenses remain separate.
Images & figures
Worked example: three future gripper frames align with an illustrative lower, close, lift action chunk. The video and action chunks are predicted together by an adapted policy. A base checkpoint needs rig-specific heads and fine-tuning before it can control a robot.
Euangelion · Source · Usage terms · Download figure