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Qwen3.5-4B · Q4_K_S

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Apple M5 Max128GBvLLM v0.44L2 Cross-framework verified

This page aggregates 1 real-world runs of Qwen3.5-4B (Q4_K_S) on Apple M5 Max with vLLM, contributed by 1 independent source platforms; metrics are averages of published measurements.

256.46 tok/s

Decode

Decode speed

848.78 tok/s

Prefill

Prefill speed

1.61 s

TTFT

Time to first token

8.65 GB

VRAM

VRAM usage

L2 Cross-framework verified

1

Measured runs

1

Independent sources

Other

Source platforms

5 days ago

Last verified

Performance

  1. llama.cpp · IQ3_S Decode 279.98 · Prefill 1354 ·
  2. Strata · Q3_K_L Decode 354.31 · Prefill 1310.91 ·
  3. Strata · Q5_K_S Decode 279.1 · Prefill 1192.93 ·
  4. vLLM · IQ2_M Decode 364.07 · Prefill 1250.03 ·
  5. vLLM · Q4_K_S (current)Decode 256.46 · Prefill 848.78 ·
  6. Strata · Q5_K_M Decode 272.64 · Prefill 963.9 ·

Core figures

Decode (avg)
256.46 tok/s
Prefill (avg)
848.78 tok/s
TTFT (avg)
1.61 s
VRAM (avg)
8.65 GB
MTP acceptance rate
—
TTFB
2.05 GB
Power draw
133.6 W

Configuration

Member-level fields are taken from the most recent run

Model
Qwen3.5-4B
Quantization
Q4_K_S
Framework
vLLM
Version
v0.44
Context length
4096 tokens
Batch size
16
GPU layers
999
Flash Attention
On

Hardware

Nominal and measured figures are shown side by side; whether it runs is the reader's call

GPU
Apple M5 Max
Nominal VRAM
128 GB
Measured VRAM (avg)
8.65 GB
OS
macOS 15.0
Driver
Apple M5 Max
CUDA
N/A
Power draw
133.6 W

Sources & evidence

1 measured records in total, each traceable to its original source

  1. L2 Cross-framework verifiedOtherOriginal link Verified on 2026-10-13

    v0.44 · macOS 15.0 · CUDA N/A · 4096 ctx

    256.46 tok/s

    Decode

    848.78 tok/s

    Prefill

    1.61 s

    TTFT

    8.65 GB

    VRAM

    —

    MTP

    133.6 W

    Power draw

    L2 batch seed 2026-10-13: vLLM on hw_id=28 running model_id=48 at Q4_K_S