Written by Jakub Rusinowski · Last updated July 12, 2026
No — DeepSeek V4.1 doesn't fit the Apple M1 Ultra's 128 GB. The cheapest card that runs it is the Apple M2 Ultra (192 GB).
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| VRAM | 128 GB unified memory |
| Memory Bandwidth | 800 GB/s |
| Quant | VRAM needed | Fits 128 GB? | Max context |
|---|---|---|---|
| F16 | 569.1 GB | ✗ No | — |
| Q8_0 | 302.8 GB | ✗ No | — |
| Q6_K | 234 GB | ✗ No | — |
| Q5_K_M | 202.4 GB | ✗ No | — |
| Q4_K_M | 172.6 GB | ✗ No | — |
| Q3_K_M | 122.1 GB | ✓ Yes | 64K |
| Q2_K | 94.5 GB | ✓ Yes | 256K |
VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 128 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 DeepSeek V4.1 variant requires more VRAM than the Apple M1 Ultra provides (128 GB).
Apple M2 Ultra (192 GB VRAM).
DeepSeek V4.1 needs ~171 GB but this GPU has 128 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 — DeepSeek V4.1 doesn't fit the Apple M1 Ultra's 128 GB. The cheapest card that runs it is the Apple M2 Ultra (192 GB).
The Apple M2 Ultra (192 GB VRAM) is the cheapest upgrade that fits it.
← Can I Run It? | DeepSeek V4.1 Model Page | Apple M1 Ultra GPU Page | Check Your Hardware