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Two people wrote a working Linux GPU driver for the M4 Mac Mini in a month, and the kernel driver took three days with Codex
Cody Ho and Niklas reverse-engineered the A18 Pro firmware ABI and shipped a kernel driver talking to AGX firmware over RTKit, plus a user-space stack with a custom IR and shader compiler that passes the full OpenGL ES 3.0 conformance suite. They ran Codex on GPT-5.6 Sol and later GPT-6 Astra for both the kernel reverse engineering and the user-space work, and Ho says those models were by far the best performers at firmware ABI RE; the prototype-to-finished kernel driver stretch took three days. Chrome and Firefox now run WebGL on it and Minecraft hits 212 fps, which makes this one of the most concrete demonstrations yet that LLMs are useful on undocumented binary protocol work rather than just CRUD code.
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