A20 Pro runs Apple on-device model at 150 tok/s, half the TTFT of A19 Pro

rxwei · x · 2026-09-18

mweinbach benchmarked Apple's on-device foundation model on iPhone 17 Pro Max (A19 Pro) vs 18 Pro Max (A20 Pro). Long prompts: 2340ms TTFT/45 tok/s vs 1125ms/55; medium: 946ms/70 vs 437ms/71; short: 638ms/100 vs 354ms/150. A20 Pro roughly halves TTFT and boosts short-prompt throughput by 50%.

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