On-Device AI Benchmarks for the A20 Pro Chip: iPhone 18 Pro Runs a 27-Billion Parameter Model Locally, Doubling the Speed of the iPhone 17 Pro
iPhone 18 Pro series equipped with 12GB 96-bit LPDDR5X memory, memory bandwidth reaches 115.2GB/s, dual 16-core neural engine peak throughput exceeds 7-core GPU. Users measured Bonsai‑27B model running smoothly locally, but Bonsai 2 cannot be fully loaded into local memory due to its 2-bit quantization being too large.
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