Chestnut
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- Reddit user adds AMD GPU to Toyota to run openpilot; comma.ai faces NHTSA probe
A Reddit user fitted an AMD Radeon RX 9060 graphics card into a 2021 Toyota Alphard so comma.ai's open-source openpilot could run an end-to-end model locally and drive hands-off on the highway; the post claims 21.4 TFLOPS of FP32 compute, an ~880M-parameter model called Chestnut and performance on par with Tesla's HW4, none of which has been independently verified. Separately, the U.S. NHTSA opened an investigation last month into comma.ai's aftermarket driver-assistance hardware — comma three, 3X and comma four — and the openpilot software, covering roughly 30,000 vehicles, with public records citing five serious highway collisions that killed three people and injured 11. Founded by George Hotz, comma.ai open-sourced openpilot in 2016 under regulatory pressure and has shipped just over 30,000 units in total.
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