comma
@comma_ai
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Make driving chill. comma four is available now for $999, plugs into the car you already drive, and drives half your miles.
San Diego, CA
Joined December 2015
Introducing comma four ▸ 5x smaller ▸ Expressive new UI ▸ Max performance, totally silent ▸ Easy 5 minute setup in 300+ cars
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We even made a fun controls challenge around some of this work
github.com
Can you design a controller to steer a simulated car? - commaai/controls_challenge
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On-device learning has been critical to shipping a consistent experience across 300+ different production cars. We believe this is one of the core problems to deploying robots in the real world, and a lot of the recent progress in openpilot has gone towards this problem.
Some interesting results from the physical Atari setup after ~6 hours of learning on different games. Policies learned on one robot performed noticeably worse on a second robot. Both robots were built by 3D printing the same models, used the same servos, and were tested in
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Can you imagine telling someone in 2010 we’d have open source self driving tech
🎄Happy Holidays from the comma team🎄 openpilot 0.10.3 - our final shipment of 2025 ❯Cool People's Driving Model 😎 ❯Medium Fanta Driver Monitoring Model🥤 ❯10x more memory-efficient IPC ⚙️ https://t.co/8kpxw5v0Fz
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Refreshed https://t.co/j1AvhkVnhC So you messed around with forks and messed up your comma? Good news! We refreshed the web flasher to make it easier to get your device back into a factory state.
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10x more memory efficient IPC TLDR: we reduced our pub-sub IPC's memory usage from 711MB to 90MB. Check out the PR for all the fun details. https://t.co/NuCNoHRJek
github.com
MSGQ allocates a 10MB ringbuffer for every service, which while wasteful, was fine when we had less services. With our current amount of services, this is now ends up being 711MB. This PR gets the ...
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Medium Fanta Driver Monitoring Model🥤 Medium Fanta is trained on a new dataset, the first to include comma four data. The comma four driver-facing camera has a different position compared to the comma three and 3X, which is why training on those segments is important.
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New on-policy training physics noise model This release includes a small change in those noise models, making them start at a noise-free initial value, which is a required change to train using the World Model Simulation.
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More flexible temporal policy architecture We changed the encoding of the Vision Features, Desire Signal, and Traffic Convention from a fixed-length non-causal attention layer to a variable-length causal attention layer.
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Cool People’s Model 😎 The Cool People’s Model comes with two changes: 1. A more flexible temporal policy architecture 2. A new on-policy training physics noise model https://t.co/eGbIhPssck
github.com
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🎄Happy Holidays from the comma team🎄 openpilot 0.10.3 - our final shipment of 2025 ❯Cool People's Driving Model 😎 ❯Medium Fanta Driver Monitoring Model🥤 ❯10x more memory-efficient IPC ⚙️ https://t.co/8kpxw5v0Fz
blog.comma.ai
New driving model
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It feels even smaller in person (that's what she said). Size comparison between the Comma 3X and the Comma 4. The small screen will take some getting used to.
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🎄 end of year comma shop update 🎄 the last comma four labels of the year have been printed, and the comma shop is officially closed until the new year. comma four production has ramped up to comma 3X production rates, and we're excited to come back and scale further
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The Comma 4 from @comma_ai has arrived! Looking forward to getting in the Rivian and swapping the 3X for this l'il guy!
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Thanks to @CordellSchroed3, @dennis_murphy, @LivingInKaos, and @gerrylum2, I'll be comparing UHF to the @comma_ai 3X in the near future. It takes a village - these great community members helped to put together a Rivian + Comma 3X kit for my Gen 1 R1S. The install is happening
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@comma_ai 4 in for a trial run.... left the 3x mount in place so I can switch back and forth for now. I will say, that keyboard is GENIUS , but still not the easiest thing. If you are a set it and forget it type, the 4 will be just fine. Using Sunnypilot, their new Sunnylink
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Fascinating talk by Robbe Derks @comma_ai about how they took the Comma 4 concept and brought it to production. Some of the early concepts are... interesting.
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