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Explore a dedicated Jetson or an Apple silicon Mac. Other documented paths carry different testing limits.
Guides / JetlinkBigger driving models.
Jetlink explained · Experimental
Bigger driving models.
A computer alongside your comma.
Jetlink connects an external computer to your comma over USB, giving Zoompilot a place to run a larger driving model.
Two devices. One model link. Separate power for each.
The idea, without the jargon
Give the model more room to run.
A driving model helps the software interpret the road and plan driving actions. Jetlink moves the larger model’s computing work to another device. Your comma stays in the system, running the matching Zoompilot software.
Prepare a model
The comma and server work together to load the selected model. Start with the project’s default while setting up offroad.
Keep the link ready
A data cable, reliable power, cooling and an awake computer are part of the setup—not optional extras.
Project requirements and overview
This is an experiment, not a self-driving upgrade. More computing does not establish better or safer behavior. Supervise continuously and be ready to take over. The project warns that a lost or delayed model link can trigger a takeover alert. Read its operating limits before use.
Do not assume TAKE CONTROL means assistance has disengaged. The reviewed Zoompilot branch defines Jetlink link loss as a warning; other faults or software revisions can behave differently. Take over when alerted and check the current instructions for your installed software. Reviewed link-loss alert.
Start with the hardware you have
Find your Jetlink setup.
Choose your comma and the computer that would run the model. These are documented requirements and project-reported testing limits; Commaguide has not tested this hardware.
Documented platform path
NVIDIA Jetson
A dedicated small computer for the larger driving model.
Project-tested on Orin Nano Super with JetPack 7.2.1.
- Jetson Orin Nano Super Developer Kit with 8 GB memory.
- At least 64 GB of microSD storage, or an NVMe SSD.
- JetPack 7.2.1; the guide also lists 6.2 as untested for this release. 7.0 and 7.1 are excluded.
- USB 3 A-to-C data cable and a separate, correctly rated power supply.
Three different ways a phone fits
Check status, change settings, or run a model?
Watch Jetlink status
A Jetson or installed PC provides a browser page on the same network. See the connection, model, preparation, performance and logs. It is read-only: it cannot change server settings.
Open the status pageManage fork settings
Remote settings belong to companion services such as sunnylink. Which controls appear depends on the fork, device and service integration.
Explore companion appsUse a phone for computing
Jetlink’s experimental iPhone and Android clients are native apps built from source. A website saved to your Home Screen cannot replace them.
Read phone limitationsStatus-page documentation · iPhone source guide · Android source guide
Understand the separate setup paths
Jetlink and Chestnut.
Jetlink is the Zoompilot project’s external-model software, with its own computer choices and experimental branch. Chestnut is comma’s external GPU hardware path for comma four. Follow the instructions for the system you actually choose.
Neither this guide nor a shared goal of running larger models establishes interchangeable hardware, equal performance, or support for the same cars.
Jetlink questions, answered.
What is Jetlink for openpilot?
Jetlink runs a larger driving model on an external computer connected to a comma over USB. Its documented comma setup uses Zoompilot’s experimental jetson-trt branch. The comma remains part of the system.
Does Jetlink work with comma four or comma 3X?
The project lists comma four and comma 3X in its requirements. That is not confirmation for every car, host computer, or model. Its published Jetson bench measurements name comma four. This guide does not establish comma 3 support.
Is Jetlink a remote settings website?
Its main purpose is external model computing. A Jetson or installed PC also has a read-only status page accessible on the same network. That page cannot change server settings. Sunnylink is a separate companion service for supported remote settings.
Can I install Jetlink from the App Store or Play Store?
The reviewed iPhone and Android guides describe native apps built from source, with no App Store, TestFlight, or Play Store release. Adding a website to your Home Screen does not install those apps.
Will a bigger model make my car self-driving?
No. A bigger model is not evidence of safer driving or better behavior on your roads. Jetlink remains experimental, and the driver must supervise and be ready to take over. Car support needs its own exact-model and equipment check.
Can I run the model over Wi-Fi?
The documented comma connection is USB. The project labels TCP as a test path and says Wi-Fi does not meet its frame budget. Opening the status page over Wi-Fi is a different activity from running the model link.
Read the original guides.
Sources checked September 29, 2026 at a recorded Jetlink revision. Development moves quickly; check the current official instructions before installing or updating both sides of the link.
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