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MagyarTesla details how it brought FSD 12.5 to HW3 vehicles with the 2024.26.15 software update
After a limited release of its latest self-driving feature update to newer Model Y vehicles with a Hardware 4 suite, Tesla is now bringing FSD 12.5 to the much larger pool of vehicles with an older HW3 set of sensors and cameras.
Back in July, Elon Musk cited the "considerable software effort to optimize the code enough to run on HW3" as a reason for the HW3 update delay, and added that it also "needs to be validated separately."
That is exactly what is happening now, as the latest Tesla software update numbered 2024.26.15 brings with it a new FSD v12.5.1.4. code branch for HW3 vehicles, whereas HW4 cars are on FSD v12.5.1.3.
This is great news for the owners of Tesla cars with Hardware 3.0 suite that are still on FSD v12.3.6., and such cars are way more numerous than the vehicles on HW4 that Tesla now calls AI4.
"Deploying the larger model requires us to implement a few kernels in the compiler to emulate the same operations that are natively supported on the AI4 hardware," clarified Tesla's AI chief Ashok Elluswamy. He is certain that the team will be able to run one and the same FSD 12.5 model on both HW3 and HW4 vehicles.
The FSD 12.5 update is pivotal in a sense that it finally merges the city and highway code stacks, introduces more intelligent turns, and brings a nagless experience while driving, even when the user is wearing sunglasses. It is also the first FSD version that may be approved for use in Europe and China later this year.
Last but not least, that will also be the update that brings the Full Self-Driving (Supervised) option to Tesla's Cybertruck, which comes with a full HW4 set of cameras and sensors.
It will be interesting to compare its FSD performance against older Hardware 3.0 vehicles, though, as Ashok also cautioned that "dataset distribution, dataset quality, model architecture, and training compute also have tremendous impact on the final performance."
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