DeepSeek-R1-Distill-Qwen-7B-mlx-8bit

8-bit MLX conversion of deepseek-ai/DeepSeek-R1-Distill-Qwen-7B optimized for Apple Silicon native GPU inference.

Converted by: SirSahOl
Source Model: deepseek-ai/DeepSeek-R1-Distill-Qwen-7B
Framework: MLX by Apple
Quantization: 8-bit (Average 8.25 bits per weight)
Format: safetensors
License: mit


Model Details

  • Architecture: Qwen2ForCausalLM
  • Parameters: 7B
  • Context Length: 131,072 tokens
  • Format: MLX (Apple Silicon native GPU format)
  • Quantization: 8-bit (Average 8.25 bits per weight)
  • Active VRAM Footprint: ~7.8 GB (Minimum recommended: 16 GB Unified Memory)

Quick Start

Installation

pip install mlx-lm

CLI Usage

# Chat interactively
mlx_lm.chat --model SirSahOl/DeepSeek-R1-Distill-Qwen-7B-chat-mlx-8bit

# Generate text
mlx_lm.generate --model SirSahOl/DeepSeek-R1-Distill-Qwen-7B-chat-mlx-8bit --prompt "Write a short poem about artificial intelligence."

Python API (with Chat Template)

from mlx_lm import load, generate

model, tokenizer = load("SirSahOl/DeepSeek-R1-Distill-Qwen-7B-chat-mlx-8bit")

messages = [
    {"role": "user", "content": "Explain quantum superposition in simple terms."}
]
prompt = tokenizer.apply_chat_template(
    messages, tokenize=False, add_generation_prompt=True
)

response = generate(model, tokenizer, prompt=prompt, verbose=True)
print(response)

Performance Benchmarks

Apple Silicon Hardware Sizing Matrix

Estimated decoding throughput, time-to-first-token (TTFT), and active unified memory footprint across Apple Silicon tiers:

Apple Silicon Tier Unified Memory Active VRAM Estimated Speed Est. TTFT Recommended Use Case
M1 / M2 / M3 / M4 (Base) 16 GB (min. required) ~7.8 GB ~22 tokens/sec ~160 ms High-precision instruction following on 16GB Apple Silicon Macs
M1 / M2 / M3 / M4 Pro 18 GB – 36 GB ~7.8 GB ~34 tokens/sec ~110 ms Balanced daily driver for complex math, structured reasoning, and code
M1 / M2 / M3 / M4 Max 36 GB – 128 GB ~7.8 GB ~48 tokens/sec ~70 ms Low-latency multi-step reasoning, swarm agents, data analysis
M1 / M2 / M3 Ultra 64 GB – 192 GB ~7.8 GB ~72 tokens/sec ~45 ms High-throughput serving with near-lossless precision

Estimates based on Apple Silicon unified memory bandwidth and active parameter footprint. Real-world speeds may vary with context length.


Multi-Quantization Comparison

Evaluate your hardware budget and choose the optimal precision:

Variant Disk Size VRAM Footprint Target Apple Silicon Hardware Key Advantage
4-bit MLX ~4.3 GB ~4.2 GB M1 / M2 / M3 / M4 (8GB+ Unified Memory) Maximum generation speed, lowest memory pressure; ideal for multitasking and everyday local chat alongside IDEs.
8-bit MLX (This Repository) ~8.1 GB ~7.8 GB M1 / M2 / M3 / M4 Pro/Max (16GB+ Unified Memory) Near-lossless precision, high-fidelity reasoning, and stable complex instruction following.
16-bit MLX ~15.2 GB ~15.2 GB M2 / M3 / M4 Max/Ultra (32GB+ Unified Memory) Full unquantized bfloat16 precision; zero perplexity loss, ideal for evaluation and reference output.

Who Should Use This?

Your Hardware Recommended Quantization
M1/M2/M3/M4 (8GB – 16GB) 4-bit — Best balance of speed, low memory, and multitasking capability
M1/M2/M3/M4 Pro/Max (18GB – 36GB) 8-bit — Higher quality reasoning with comfortable memory headroom
M1/M2/M3/M4 Max/Ultra (36GB – 192GB) 16-bit — Unquantized full precision, zero quality degradation

General guidance:

  • Use 4-bit if you want to run this model alongside IDEs, browsers, and background development tools.
  • Use 8-bit if you have 16GB+ unified memory and require superior reasoning and code accuracy.
  • Use 16-bit for research, benchmarking, evaluation, or high-end workstation deployments.

Other Quantization Variants


LM Studio & Local Inference Setup Guide

To prevent runaway loops and ensure correct conversational turn-taking, configure custom stop strings in your local inference runtime.

Custom Stop Strings Configuration

Ensure the following sequence tokens are configured as strict stop boundaries:

  1. <|im_start|>
  2. <|im_end|>
  3. <|endoftext|>

Option A: Automatic Preset (Recommended for LM Studio)

Create a custom prompt preset JSON file named Qwen2.5.json in your LM Studio config directory:

  • macOS / Linux: ~/.lmstudio/config-presets/Qwen2.5.json
  • Windows: %USERPROFILE%\.lmstudio\config-presets\Qwen2.5.json
{
  "name": "Qwen2.5",
  "inference_params": {
    "pre_prompt": "You are a helpful, respectful, and honest assistant.",
    "input_prefix": "<|im_start|>user\n",
    "input_suffix": "<|im_end|>\n",
    "pre_prompt_prefix": "<|im_start|>system\n",
    "pre_prompt_suffix": "<|im_end|>\n",
    "antiprompt": [
      "<|im_start|>",
      "<|im_end|>",
      "<|endoftext|>"
    ],
    "stopStrings": [
      "<|im_start|>",
      "<|im_end|>",
      "<|endoftext|>"
    ],
    "temperature": 0.7,
    "max_tokens": 2048
  }
}

Restart LM Studio, load SirSahOl/DeepSeek-R1-Distill-Qwen-7B-chat-mlx-8bit, and select "Qwen2.5" from the Prompt Template dropdown.

Option B: Manual LM Studio Configuration

  1. Load SirSahOl/DeepSeek-R1-Distill-Qwen-7B-chat-mlx-8bit in LM Studio.
  2. In the right-hand Advanced Configuration / Inference Parameters panel:
    • Stop Strings (antiprompt / stopStrings): Add <|im_start|>, <|im_end|>, <|endoftext|>
    • System Prefix: <|im_start|>system\n
    • System Suffix: <|im_end|>\n
    • User Prefix: <|im_start|>user\n
    • Assistant Suffix: <|im_end|>\n<|im_start|>assistant\n

Option C: Ollama Modelfile Setup

Create a Modelfile to run this model in Ollama:

FROM SirSahOl/DeepSeek-R1-Distill-Qwen-7B-chat-mlx-8bit

PARAMETER stop "<|im_start|>"
PARAMETER stop "<|im_end|>"
PARAMETER stop "<|endoftext|>"
PARAMETER temperature 0.7

TEMPLATE """{{ if .System }}<|im_start|>system
{{ .System }}<|im_end|>
{{ end }}{{ if .Prompt }}<|im_start|>user
{{ .Prompt }}<|im_end|>
{{ end }}<|im_start|>assistant
"""

Create and run with Ollama:

ollama create deepseek-r1-distill-qwen-7b-chat-mlx-8bit -f Modelfile
ollama run deepseek-r1-distill-qwen-7b-chat-mlx-8bit

Conversion Details

Property Value
Source Model deepseek-ai/DeepSeek-R1-Distill-Qwen-7B
Quantization 8-bit
mlx-lm Version 0.31.3
Conversion Time 126.61s
Output Size 7.5 GB
Date 2026-09-14T23:37:14.803647+00:00

Reproduction

To reproduce this conversion:

pip install mlx-lm==0.31.3
python3 -m mlx_lm.convert --hf-path /root/.cache/huggingface/hub/models--deepseek-ai--DeepSeek-R1-Distill-Qwen-7B/snapshots/916b56a44061fd5cd7d6a8fb632557ed4f724f60 --mlx-path output/DeepSeek-R1-Distill-Qwen-7B-mlx-8bit -q --q-bits 8

Limitations & Known Issues

  • 4-bit group-wise quantization introduces minor precision loss compared to unquantized weights; for deep mathematical derivations or precision-critical reasoning, test the 8-bit or 16-bit variants.
  • High context sequences (>32K tokens) require sufficient unified memory headroom; ensure unified memory is not overcommitted.
  • This is a weight-only MLX conversion designed specifically for Apple Silicon GPUs (M1/M2/M3/M4 series).

License

This model conversion inherits the license of the source model: mit.

See the original model card for full license details.


Changelog

Version Date Changes
v1.0 2026-09-14 Initial conversion

Converted with MLX Foundry — a professional pipeline for converting models to Apple MLX format.

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