Can I Run Gemma 4 31B on Apple M3 Pro?
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 29 września 2026
Yes. Gemma 4 31B needs 21.4 GB at 8K context (18.7 GB weights + 2.7 GB KV cache/overhead) at Q4_K_M and the Apple M3 Pro has 27 GB usable, leaving about 5.6 GB of headroom, at roughly 4 tok/s (estimated) with room for up to 64K of context.
See what else this hardware can run →
The numbers
| Model | Gemma 4 31B |
| Parameters | 31B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 21.4 GB |
| Apple M3 Pro usable memory | 27 GB |
| Verdict | Runs |
| Max context | 64K |
| Estimated speed | ~4 tok/s |
Gemma 4 31B on the Apple M3 Pro: VRAM by quantization
| Quant | VRAM needed | Fits 36 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 64.7 GB | ✗ No | — | — |
| Q8_0 | 35.7 GB | ✗ No | — | Build for this |
| Q6_K | 28.1 GB | ✗ No | — | — |
| Q5_K_M | 24.7 GB | ✓ Yes | 32K | Build for this |
| Q4_K_M | 21.4 GB | ✓ Yes | 64K | Build for this |
| Q3_K_M | 15.9 GB | ✓ Yes | 128K | — |
| Q2_K | 12.9 GB | ✓ Yes | 128K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 36 GB of unified memory. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the Apple M3 Pro: 8K 21.4 GB · 32K 23.5 GB · 128K 31.5 GB ✗. Past 128K it no longer fits 36 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
No compatible GPU? Gemma 4 31B on 32 GB of system RAM, CPU only: runs comfortably.
Running Gemma 4 31B on this card:
Gemma 4 31B needs ~21 GB but this GPU has 36 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Other Gemma 4 sizes on the Apple M3 Pro
- Gemma 4 26B-A4B — runs (17 GB)
- Gemma 4 12B (Unified) — runs (8.7 GB)
- Gemma 4 E4B — runs (6.4 GB)
- Gemma 4 E2B — runs (4.7 GB)
Gemma 4 31B on nearby hardware
- Apple M5 (32 GB) — runs
All Gemma 4 sizes on the Apple M3 Pro | Gemma 4 31B model page | Apple M3 Pro GPU page | VRAM calculator | Check your hardware