Can I Run GLM-5.1 72B on Apple M5?

Name: LLM Configurator — GPU VRAM Checker
Author: LLM Configurator

Written by Jakub Rusinowski · Last updated August 15, 2026

Not at Q4_K_M — that needs 43.5 GB and the Apple M5 has 32 GB. Drop to Q2_K and it fits in 26.9 GB, with up to 16K of context.

The numbers

Model	GLM-5.1 72B
Parameters	72B
Quantization	Q4_K_M
VRAM needed	43.5 GB
Apple M5 VRAM	32 GB
Verdict	Runs at a lower quant
Fits at	Q2_K (26.9 GB)
Max context	16K

What to do next

Quantize to Q2_K. That is the cheapest fix — it costs some quality but no money.

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Running GLM-5.1 72B on this card:

Apple MacBook Air M5

32 GB VRAM · 23 W board power

2026 prices are volatile — check the current listing.

Check price on Amazon

Won't fit — rent GLM-5.1 72B instead

GLM-5.1 72B needs ~43 GB but this GPU has 32 GB. Rent a A100 (80 GB)-class GPU by the hour instead of buying one:

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Vast.ai $0.77/hr · typical low · varies

Rent on Vast.ai →

RunPod $1.39/hr

Rent on RunPod →

Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.

Other GLM-5 / GLM-5.1 sizes on the Apple M5

GLM-5 744B — does not fit (449.2 GB)
GLM-5 32B — runs (19.3 GB)
GLM-5 9B — runs (5.4 GB)

GLM-5.1 72B on nearby hardware

AMD Radeon RX 7900 XTX (24 GB) — does not fit
Apple M3 Pro (36 GB) — runs at a lower quant

All GLM-5 / GLM-5.1 sizes on the Apple M5 | VRAM calculator for GLM-5.1 72B | Apple M5 GPU page | Check your hardware