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metadata
license: apache-2.0
language:
  - multilingual
base_model: Qwen/Qwen3.5-122B-A10B
base_model_relation: quantized
tags:
  - mlx
  - quantization
  - mixed-precision
  - vision
  - multimodal
  - qwen3.5
  - moe
  - 122B
  - apple-silicon
library_name: mlx
pipeline_tag: image-text-to-text
model_type: qwen3_5_moe
model_name: Qwen3.5-122B-A10B-MLX-3.7bit-VL
metadata:
  parameters:
    - 122B
extra_gated_heading: Qwen3.5-122B-A10B (MLX 3.7-bit VL)

Qwen3.5-122B-A10B-MLX-3.7bit-VL

Mixed-precision MLX quantization of Qwen3.5-122B-A10B β€” Alibaba's latest MoE model with full vision support preserved in BF16.

  • 3.655 BPW | 52 GB | Vision preserved (BF16)

πŸš€ Hardware Optimization

This model brings 122B-class multimodal performance to Apple Silicon. By utilizing advanced mixed-precision quantization, we've compressed the model from uniform 4-bit's 65GB down to 52GB β€” a 13GB reduction β€” while preserving the full vision pipeline at BF16 precision for lossless image understanding.

This optimization unlocks two distinct local inference experiences:

  • 64GB Unified Memory (Minimum): The uniform 4-bit quantization weighs 65GB and simply cannot fit in 64GB at all. This quantization breaks that barrier β€” fitting a full 122B multimodal model into 64GB for the first time, pushing the hardware boundaries to make local 122B vision+language inference possible on edge devices.
  • 96GB+ Unified Memory (Recommended): Delivers an uncompromised, buttery-smooth multimodal experience. The efficient footprint frees up massive headroom for the KV cache, completely unlocking ultimate long-context capabilities for both text and vision tasks.

Quantization

4-tier mixed precision by functional sensitivity:

Bits Layers % Params Description
BF16 β€” ~2% Vision tower, norm, router, conv1d β€” preserving full visual fidelity
6-bit β€” ~8% Embeddings, v/o_proj, edge layers, full_attention q/k
4-bit β€” ~3% DeltaNet attention, shared expert
3-bit β€” ~87% Expert FFN (256 experts, 8 active/token)

Benchmark (M2 Max 96GB)

This (3.7bit) Uniform 4bit
Model size 52 GB 65 GB
Peak memory (ctx=4k) 55.1 GB 67.7 GB
Prefill (1k ctx) 219.0 tok/s 210.5 tok/s
Prefill (4k ctx) 230.6 tok/s 227.7 tok/s
Generation (1k ctx) 36.2 tok/s 38.3 tok/s
Generation (4k ctx) 33.6 tok/s 35.8 tok/s

Speed is virtually identical, but the 13GB saved makes the difference between a usable and unusable long-context experience on 96GB machines.

Quality (WikiText-2 Perplexity)

Lower is better. Evaluated on 128 sequences Γ— 2048 tokens.

Metric Value
Mean Perplexity 5.3536
Median Perplexity 5.3639
Trimmed Mean Perplexity 5.6631

Usage

from mlx_vlm import load, generate

model, processor = load("MoringLabs/Qwen3.5-122B-A10B-MLX-3.7bit-VL")

# ζ–‡ζœ¬ε―Ήθ―
response = generate(model, processor, prompt="Hello!", max_tokens=200)

# 图像理解
response = generate(model, processor, prompt="Describe this image", image="photo.jpg", max_tokens=200)
print(response)

License

Apache 2.0