Gemma 4 31B on Apple M4 Ultra (192GB)

M4 Ultra (192GB) runs Gemma 4 31B at Q8_0 — 18 tok/s. Usable on 192 GB VRAM — see full quantization options below.

Model Size

30.7B

Device VRAM

192 GB

Bandwidth

819 GB/s

Quantization

Q8_0

Benchmarks

Performance by Quantization

OwnRig currently has one published compatibility entry for Gemma 4 31B on Apple M4 Ultra (192GB) at Q8_0. This is the best supported pairing we can stand behind today.

Quantization	Speed	TTFT	Fits in VRAM	Rating	Confidence
Q8_0	18 tok/s	400ms	✓ Yes	Acceptable	estimated

Notes

Q8_0

30.7B model. Q8_0 32.64GB on 192GB apple_silicon.

About Gemma 4 31B

Gemma 4 31B (30.7B) is a chat, coding, reasoning, multi-purpose model. Google's flagship open-weight model. Dense 30.7B parameters with 256K context. Benchmarks: 89.2% AIME 2026, 85.2% MMLU Pro, 84.3% GPQA Diamond, 80.0% LiveCodeBench v6, 86.4% agentic tool use. Supports text, image, and video input. Fits on a single RTX 4090 at Q4 or dual 16 GB GPUs. Direct successor to Gemma 3 27B with substantially better reasoning. Apache 2.0 licensed.

View all Gemma 4 31B hardware options →

About Apple M4 Ultra (192GB)

Apple M4 Ultra (192GB) has 192 GB at 819 GB/s. Available in Mac Studio, Mac Pro.

See all models Apple M4 Ultra (192GB) can run →

Estimate method: Estimated from model architecture, quantization size, and device bandwidth. Reference hardware source: huggingface.co (2026-04-04)

Performance varies by driver version, inference engine, quantization method, context length, and system configuration. Figures shown are estimates based on community benchmarks and may not reflect your exact setup. Product names are trademarks of their respective owners. OwnRig is independent and not affiliated with any hardware or AI model provider.