Qwen2.5­Code-14B - MLX mxfp4 Quantized

• Repository: johnlockejrr/Qwen2.5-7B-Instruct-mxfp4
• Base model: https://huggingface.co/Qwen/Qwen2.5-7B-Instruct
• Quantization: MLX mxfp4 (4-bit)
• Quantized by: johnlockejrr
• Framework: MLX + mlx-lm
• Quantization tool: https://github.com/EricFillion/quantize

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Model Summary

This repository contains an MLX-quantized version of Qwen2.5-7B-Instruct, optimized for Apple Silicon (M1/M2/M3/M4) devices.
The model was quantized to mxfp4 (4-bit) using the MLX-based quantization tool by Eric Fillion, reducing memory usage from approximately 14-15 GB (FP16) to approximately 5-6 GB while maintaining strong instruction-following performance.

This quantized model is ideal for:

• local assistants
• offline workflows
• VS Code integration
• fast inference on Apple GPUs
• running large models on 8 GB, 16 GB, or 24 GB Apple Silicon machines

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Quantization Details

Command used:

python3 quantize.py \
  --model_name Qwen/Qwen2.5-7B-Instruct \
  --save_model_path models/qwen2.5-7b-instruct-mxfp4 \
  --q_mode mxfp4 \
  --q_bits 4 \
  --q_group_size 64

Resulting model size: approximately 5-6 GB

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Running the Model (MLX)

CLI (mx-lm)

mlx_lm.generate \
  --model johnlockejrr/qwen2.5-7b-instruct-mxfp4 \
  --prompt "Write a poem about the Fibonacci numbers." \
  --max-tokens 512

Python API

from mlx_lm import load, generate

model, tokenizer = load("johnlockejrr/qwen2.5-7b-instruct-mxfp4")

prompt = "Explain recursion in simple terms."

output = generate(model, tokenizer, prompt, max_tokens=200)
print(output)

Chat Mode

from mlx_lm import load, chat

model, tokenizer = load("johnlockejrr/qwen2.5-7b-instruct-mxfp4")

messages = [
    {"role": "user", "content": "What is a binary search tree?"}
]

response = chat(model, tokenizer, messages)
print(response)

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Performance (Mac Mini M4, 16 GB)

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Repository Contents

model-00001-of-00002.safetensors
model-00002-of-00002.safetensors
model.safetensors.index.json
config.json
tokenizer.json
tokenizer_config.json
chat_template.jinja
generation_config.json
README.md

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License

This model inherits the license of the original model:

Qwen2.5-7B-Instruct License: https://huggingface.co/Qwen/Qwen2.5-7B-Instruct#license

Please review the license before using this model in commercial applications.

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Limitations and Bias

• The model may generate incorrect or insecure code.
• It may hallucinate APIs or functions.
• It may produce biased or harmful statements if prompted.
• It should not be used for production-critical code without human review.

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Acknowledgements

• Qwen Team for the original Qwen2.5-7B-Instruct model
• Apple MLX Team for the MLX framework
• Eric Fillion for the MLX quantization tool
• Hugging Face for hosting the model