Written by Jakub Rusinowski · Last updated August 15, 2026
No — GLM-5.2 doesn't fit the Apple M2 Ultra's 192 GB; you're short by ~56 GB even at Q2_K. The cheapest card that runs it is the Apple M3 Ultra (512 GB).
| VRAM | 192 GB unified memory |
| Memory Bandwidth | 800 GB/s |
| Quant | VRAM needed | Fits 192 GB? | Max context |
|---|---|---|---|
| F16 | 1491.4 GB | ✗ No | — |
| Q8_0 | 793.9 GB | ✗ No | — |
| Q6_K | 613.5 GB | ✗ No | — |
| Q5_K_M | 530.7 GB | ✗ No | — |
| Q4_K_M | 452.6 GB | ✗ No | — |
| Q3_K_M | 320.5 GB | ✗ No | — |
| Q2_K | 248 GB | ✗ No | — |
VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 192 GB of unified memory. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Every GLM-5.2 variant requires more VRAM than the Apple M2 Ultra provides (192 GB).
Apple M3 Ultra (512 GB VRAM).
GLM-5.2 needs ~449 GB but this GPU has 192 GB. Rent a 8× H100 (640 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.
No — GLM-5.2 doesn't fit the Apple M2 Ultra's 192 GB; you're short by ~56 GB even at Q2_K. The cheapest card that runs it is the Apple M3 Ultra (512 GB).
The Apple M3 Ultra (512 GB VRAM) is the cheapest upgrade that fits it.
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