❯ Xiaomi Unveils Three Xuanjie Chips; D100 Supports Local Deployment of 200-Billion-Parameter Model

TRIPLE LAUNCHXiaomi officially disclosed at a technical briefing that it is releasing three self-developed chips at once. The flagship SoC Xuanjie O3 uses a 3nm process, has a die area of 133 square millimeters, and integrates 24 billion transistors (up 26% from the previous generation). Its CPU is a 10-core architecture with six ultra-large cores and four large cores, running up to 4.35 GHz — a 60% performance improvement. The GPU is a 16-core design, 85% faster. The O3 has already entered volume production and will debut in the Xiaomi 18 Fold foldable next month.

AUTO & EDGEThe other two chips better illustrate the direction. The Xuanjie D100 is what Xiaomi officially calls China’s first 3nm high-compute AI chip for intelligent driving, with a 20-core CPU and a 16-core NPU, supporting up to 160GB of unified memory, which enables on-board local deployment of a 200-billion-parameter model. R&D is complete, and it will go into commercial use next year. The Xuanjie O100, meanwhile, is a high-bandwidth accelerator built specifically for on-device large models. It uses the industry’s first 6nm wafer-level vertical stacking and hybrid bonding process, with a bonding pitch of 1.4 micrometers and bandwidth of 1.22TB/s — 16 times that of traditional flagship phones — with on-device inference speeds of up to 330 TPS.

MEMORY WALLThe three chips point to the same conclusion: the bottleneck for on-device large models is not compute but memory bandwidth. The O100 uses advanced packaging to lift bandwidth by an order of magnitude, while the D100 uses 160GB of unified memory to raise the ceiling on “how large a model can run in a car.” If 200 billion parameters can stay local, cloud inference call volume, data-compliance paths, and the charging rationale for subscription models will all need to be reframed — and that line was drawn by Xiaomi itself, not handed down by a chip supplier.

▪ SIGNALXiaomi put its most aggressive chip in the car, not the phone.