Windflow

comma.ai world model 4B

comma.ai · Released 1 September 2026

comma.ai's 4B driving world model predicts what the car's two cameras will see next, together with a driving plan, from recent frames and the car's own motion. comma uses it as a simulator to train openpilot driving policies with reinforcement learning; the weights are MIT.

Get the weightsCan I use it commercially?
Weights
Open weightsMIT
Commercial use
Permissive license
Real-time
No real-time claim
Where to try
Run it yourself

01 Controls

What you control

  • Recent camera frames
  • The car's ego motion
  • Future anchors for the driving plan

02 License

Can you use it commercially?

Permissive license

The weights' model card declares MIT, a permissive license that allows commercial use. Check what the model was built on, because a base model's terms can still apply.

Declared license: MIT · Model card

A reading of the published license text, not legal advice.

03 Speed

Does it run in real time?

No real-time claim. The cited sources make no real-time claim.

Figures are the authors' own, with their settings and hardware. They are not comparable across models.

04 Access

Where to try it

No hosted version was verified. Run the published weights yourself.

Listed alphabetically. Windflow maintains this directory and is one of the hosts; a listing does not promise capacity at any given moment.

05 Questions

comma.ai world model 4B FAQ

Is comma.ai world model 4B open source?

comma.ai world model 4B publishes downloadable weights under MIT. The declared license is permissive.

Can I use comma.ai world model 4B commercially?

The weights' model card declares MIT, a permissive license that allows commercial use. Check what the model was built on, because a base model's terms can still apply.

Does comma.ai world model 4B run in real time?

The cited sources do not claim real-time operation.

Where can I try comma.ai world model 4B?

No hosted version was verified; run the published weights yourself.

What does comma.ai world model 4B take as input?

You give it recent camera frames, the car's ego motion and future anchors for the driving plan.

What are alternatives to comma.ai world model 4B?

Similar models in this directory include Oasis 3 (no public weights, service terms), Orbis (open weights, permissive license) and Orbis 2 (open weights, permissive license).

Similar world models

All 56 in the directory