Can a Mac Studio M2 Ultra (64GB) run Phi-4 14B?

Yes — Phi-4 14B runs at FP16 (29.3 GB) at about 16–24 tok/s on a Mac Studio M2 Ultra (64GB).

How much memory does Phi-4 14B need?

Phi-4 14B needs about 7.2 GB at 4K context at its smallest quantization. A Mac Studio M2 Ultra (64GB) has 64.0 GB.

Yes — Phi-4 14B runs on a Mac Studio M2 Ultra (64GB) at FP16

Yes — it runs great.

Runs great

Best fit: Phi-4 14B at FP16 · 29.3 GB weights · 16–24 tok/s on a Mac Studio M2 Ultra (64GB).

Arena Text Overall · style-controlled

1,256FP16 untested

phi-4 · published configuration reference · FP16 not tested

Arena Text Overall (style-controlled), exact published entry phi-4, 2026-10-08: reference rating 1,256.3. Published confidence bounds 1,251.7–1,260.9. 24,126 votes. Published phi-4 configuration reference. Reasoning mode is not disclosed by the Arena dataset. Tested precision, runtime and sampling settings are not disclosed in this dataset. Selected FP16 has not been measured by this Arena entry. No quantization quality adjustment is applied.

Snapshot published 2026-10-08 · snapshot imported 2026-10-11 UTC · validated last-good data · manual refresh

Arena leaderboard dataset · Arena / lmarena-ai, Arena Leaderboard Dataset (CC BY 4.0). Selected Text Overall style-controlled rows; field names adapted, ratings unchanged. · dataset CC BY 4.0 · revision e16f90232986

Total memory at 4K context: 31.0 GB; Weights + KV cache + runtime overhead
Estimated generation: 16–24 tok/s
Estimated first token: ~6.8s

Every quantization on this machine

On small screens, each quant lists every metric below its name. On wider screens, scroll sideways for total memory, speed and fit. Keyboard: focus the table, then use the arrow keys. Quant names stay visible.

Phi-4 14B quantizations on Mac Studio M2 Ultra (64GB), estimated at 4K context. Weights and total memory are shown separately.
Quant	Weights	Total memory	Speed	Fit
Q2_K	5.6 GB	7.2 GB	56–84 tok/s	Runs great
Q3_K_M	7.2 GB	8.8 GB	48–72 tok/s	Runs great
Q4_K_M	8.9 GB	10.5 GB	42–63 tok/s	Runs great
Q5_K_M	10.4 GB	12.0 GB	37–56 tok/s	Runs great
Q6_K	12.0 GB	13.7 GB	34–51 tok/s	Runs great
Q8_0	15.6 GB	17.2 GB	28–41 tok/s	Runs great
FP16	29.3 GB	31.0 GB	16–24 tok/s	Runs great

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