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Can the Apple M3 Ultra (256GB) run Qwen3.8 Flash Next?

Apple M3 Ultra (256GB) × Qwen3.8 Flash Next8K context
YesRuns fully on the GPU
Memory at Q6_K148.4 GB of 192 GB
Weights 147.6 GBKV cache 0.2 GBRuntime 0.6 GB
QuantQ6_KExcellent
Speed~100tokens per second
Max context256Kthe model's full window
  1. FP16
  2. Q8_0
  3. Q6_K
  4. Q5_K_M
  5. Q4_K_M
  6. Q3_K_M
  7. Q2_K

Yes. The Apple M3 Ultra (256GB) can run Qwen3.8 Flash Next fully in unified memory at Q6_K (excellent), using about 148.4 GB of the 192 GB available, at roughly 100 tokens/second.

Try other context lengths

Run it in the cloud

No Apple M3 Ultra (256GB)? Run Qwen3.8 Flash Next in the cloud.

Rent a cloud GPU by the hour. No upfront cost, stop any time.

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Memory needed by quantization

At 8,192 tokens of context. The black line marks the 192 GB the Apple M3 Ultra (256GB) can use. macOS lets the GPU use about 192 GB of the 256 GB unified memory by default.

QuantQualityMemoryFits?Speed
FP16Full quality360.8 GBToo big—
Q8_0Near-lossless192.1 GBToo big—
Q6_KExcellent148.4 GBFits~100 tok/s
Q5_K_MVery good128.8 GBFits~115 tok/s
Q4_K_MGood, most popular109.9 GBFits~135 tok/s
Q3_K_MNoticeably degraded88.8 GBFits~168 tok/s
Q2_KHeavily degraded68.3 GBFits~218 tok/s

Measured speed from real Apple M3 Ultra (256GB) owners

Tokens per second that people measured on their own Apple M3 Ultra (256GB), next to our estimate.

No one has measured Qwen3.8 Flash Next on the Apple M3 Ultra (256GB) yet. The speeds above are estimates. Run the benchmark and yours becomes the first real number on this page.

Have an Apple M3 Ultra (256GB)? Add your real speed

One command times Qwen3.8 Flash Next in your own Ollama, shows you exactly what it would send, and asks before sending anything. No sign-up, no personal data.

macOS and Linux

curl -fsSL https://gpufit.dev/bench.sh | sh

Windows (PowerShell)

irm https://gpufit.dev/bench.ps1 | iex

How the benchmark works

GPUs that run Qwen3.8 Flash Next comfortably

Models that run well on the Apple M3 Ultra (256GB)

Frequently asked questions

Can Apple M3 Ultra (256GB) run Qwen3.8 Flash Next?

Yes. The Apple M3 Ultra (256GB) can run Qwen3.8 Flash Next fully in unified memory at Q6_K (excellent), using about 148.4 GB of the 192 GB available, at roughly 100 tokens/second.

How much VRAM does Qwen3.8 Flash Next need?

About 109.9 GB at Q4_K_M with 8,192 tokens of context, and about 360.8 GB at full FP16 precision.

How fast is Qwen3.8 Flash Next on the Apple M3 Ultra (256GB)?

Roughly 100 tokens per second at Q6_K, estimated from the Apple M3 Ultra (256GB)'s 819 GB/s memory bandwidth.