Can I Run Inkling on Apple M3 Ultra?
作者： Jakub Rusinowski · 最后更新： 2026年11月11日
Yes, comfortably — Inkling Small at Q4_K_M needs 161.8 GB at 8K context (160.6 GB weights + 1.2 GB KV cache/overhead), leaving ~222.2 GB of the Apple M3 Ultra's 384 GB usable memory, at ~51 tok/s (est.), with room for up to 1M context.
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Apple M3 Ultra Specs
| VRAM | 512 GB unified memory |
| Memory Bandwidth | 819 GB/s |
Inkling Small on the Apple M3 Ultra: VRAM by quantization
| Quant | VRAM needed | Fits 512 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 533.1 GB | ✗ No | — | — |
| Q8_0 | 283.8 GB | ✓ Yes | 1M | — |
| Q6_K | 219.3 GB | ✓ Yes | 1M | — |
| Q5_K_M | 189.7 GB | ✓ Yes | 1M | — |
| Q4_K_M | 161.8 GB | ✓ Yes | 1M | — |
| Q3_K_M | 114.5 GB | ✓ Yes | 1M | — |
| Q2_K | 88.6 GB | ✓ Yes | 1M | — |
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 512 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 Ultra: 8K 161.8 GB · 32K 162.5 GB · 128K 165.3 GB. Every window this model publishes still fits 512 GB.
Inkling Sizes That Fit the Apple M3 Ultra (at 8K context)
| Inkling Small | Q4_K_M · 161.8 GB at 8K context · ~51 tok/s (est.) |
Inkling needs ~162 GB but this GPU has 512 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.
FAQ
Does the Apple M3 Ultra have enough VRAM for Inkling?
Yes, comfortably — Inkling Small at Q4_K_M needs 161.8 GB at 8K context (160.6 GB weights + 1.2 GB KV cache/overhead), leaving ~222.2 GB of the Apple M3 Ultra's 384 GB usable memory, at ~51 tok/s (est.), with room for up to 1M context.
Which quantization of Inkling should I use on the Apple M3 Ultra?
Inkling Small at Q4_K_M quantization needs 161.8 GB at 8K context (160.6 GB weights + 1.2 GB KV cache/overhead), estimated ~51 tokens/sec, up to 1M context.
Every Inkling size on the Apple M3 Ultra
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Inkling (BF16) | 1956.5 GB | Runs at Q2_K | — |
| Inkling (NVFP4) | 555 GB | Runs at Q2_K | — |
Popular Models on the Apple M3 Ultra
VRAM Tier
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