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Qwen3.8 4B Distilled

Name: Qwen3.8_4B_Distilled
Availability: InStock

Qwen3.8 4B Distilled is a 4-billion-parameter reasoning model created by distilling outputs from Qwen3.8-Max into the smaller Qwen3-4B-Thinking-2507 student model.

The model was fine-tuned on r0b0tlab/qwen3.8-max-distillation-50k, a dataset of responses and reasoning traces generated by qwen3.8-max-preview.

Model Lineage and Naming

The name Qwen3.8 4B Distilled describes the model's distillation lineage:

Teacher model: qwen3.8-max-preview
Student/base model: Qwen/Qwen3-4B-Thinking-2507
Resulting model size: Approximately 4 billion parameters
Distillation dataset: r0b0tlab/qwen3.8-max-distillation-50k

This is a Qwen3-architecture student model distilled from Qwen3.8-Max-generated outputs.

The repository does not claim that the underlying architecture or original weights are from Qwen3.8-Max. Qwen3.8-Max is the teacher whose generated responses and reasoning traces were used as training targets for the 4B student.

This is an independently fine-tuned community model and is not an official Qwen or Alibaba release.

Model Details

Property	Value
Model type	Decoder-only causal language model
Architecture	Qwen3
Parameters	Approximately 4B
Base model	`Qwen/Qwen3-4B-Thinking-2507`
Teacher model	`qwen3.8-max-preview`
Training method	Sequence-level supervised distillation
Weight format	Safetensors
Primary task	Reasoning and conversational text generation
Primary language	English
Thinking mode	Enabled

Distillation Dataset

The model was trained on:

r0b0tlab/qwen3.8-max-distillation-50k

The dataset contains teacher-generated examples across areas including:

Mathematics
Programming
General reasoning
Scientific reasoning
Instruction following
Limited tool use

Teacher responses were generated by qwen3.8-max-preview. Visible <think>...</think> reasoning traces were retained when present in the dataset.

What “Distilled” Means Here

This model uses sequence-level knowledge distillation.

The smaller student was trained on complete responses produced by the larger teacher. This transfers parts of the teacher's behavior, reasoning patterns, solution structure, and response style without copying the teacher's architecture or weights.

Therefore:

The architecture and original student weights come from Qwen3-4B-Thinking-2507.
The distillation targets come from Qwen3.8-Max-generated outputs.
The resulting checkpoint remains a 4B Qwen3 model.
The model is not expected to reproduce the full capabilities of Qwen3.8-Max.

Installation

pip install --upgrade transformers accelerate torch

Transformers Usage

python

import torch
from transformers import AutoModelForCausalLM, AutoTokenizer

MODEL_ID = "Ma7ee7/Qwen3.8_4B_Distilled"

tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)

model = AutoModelForCausalLM.from_pretrained(
    MODEL_ID,
    torch_dtype="auto",
    device_map="auto",
)

messages = [
    {
        "role": "user",
        "content": (
            "A farmer has 120 meters of fencing and wants to build a "
            "rectangular enclosure. What dimensions maximize the area?"
        ),
    }
]

prompt = tokenizer.apply_chat_template(
    messages,
    tokenize=False,
    add_generation_prompt=True,
)

inputs = tokenizer(prompt, return_tensors="pt").to(model.device)

with torch.inference_mode():
    output_ids = model.generate(
        **inputs,
        max_new_tokens=4096,
        do_sample=True,
        temperature=0.6,
        top_p=0.95,
        top_k=20,
        repetition_penalty=1.05,
    )

new_tokens = output_ids[0, inputs["input_ids"].shape[-1]:]
response = tokenizer.decode(new_tokens, skip_special_tokens=True)

print(response)

Pipeline Usage

python

from transformers import pipeline

MODEL_ID = "Ma7ee7/Qwen3.8_4B_Distilled"

generator = pipeline(
    task="text-generation",
    model=MODEL_ID,
    device_map="auto",
    torch_dtype="auto",
)

messages = [
    {
        "role": "user",
        "content": "Explain why the square root of 2 is irrational.",
    }
]

result = generator(
    messages,
    max_new_tokens=4096,
    do_sample=True,
    temperature=0.6,
    top_p=0.95,
    top_k=20,
    repetition_penalty=1.05,
)

print(result[0]["generated_text"])

Recommended Generation Settings

Setting	Recommended value
Temperature	`0.6`
Top-p	`0.95`
Top-k	`20`
Repetition penalty	`1.0`–`1.1`
Maximum new tokens	`4096` or higher

For difficult mathematics, programming, or long-form reasoning, allow enough output tokens for the model to complete both its reasoning and final answer.

Thinking Output

The model inherits a thinking-oriented chat format from Qwen3-4B-Thinking-2507. Depending on the inference application and reasoning parser, visible reasoning may be displayed in a form similar to:

text

<think>
Reasoning process
</think>

Final answer

Some applications may hide the thinking section or render it separately from the final answer.

vLLM

Install vLLM:

pip install --upgrade vllm

Start an OpenAI-compatible server:

bash

vllm serve Ma7ee7/Qwen3.8_4B_Distilled \
    --max-model-len 32768 \
    --enable-reasoning \
    --reasoning-parser deepseek_r1

Example request:

bash

curl http://localhost:8000/v1/chat/completions \
    -H "Content-Type: application/json" \
    -d '{
        "model": "Ma7ee7/Qwen3.8_4B_Distilled",
        "messages": [
            {
                "role": "user",
                "content": "Solve x^2 - 5x + 6 = 0 and explain your reasoning."
            }
        ],
        "temperature": 0.6,
        "top_p": 0.95,
        "max_tokens": 4096
    }'

Intended Uses

This model is intended for experimentation with:

Mathematical reasoning
Programming and code generation
Logical reasoning
Scientific question answering
General instruction following
Long-form problem solving
Research into teacher-to-student distillation
Local conversational assistants

Limitations

This is a 4B student model and does not contain the complete knowledge or capabilities of Qwen3.8-Max.
Distillation transfers patterns from teacher-generated outputs; it does not copy the teacher's architecture or weights.
Teacher-generated answers may contain factual, mathematical, or programming errors.
Visible reasoning traces should not automatically be assumed to be correct.
The model may hallucinate or produce confidently incorrect answers.
Tool-use examples represent only a small portion of the training data.
The training mixture is primarily English.
The training dataset may include prompts derived from common evaluation benchmarks.
Results on overlapping benchmarks should not be treated as uncontaminated evaluations without additional controls.
Outputs should be reviewed before use in high-stakes medical, financial, legal, or security-sensitive settings.

License and Training-Data Notice

This repository is published under the Apache License 2.0.

That license does not override any separate licenses, attribution requirements, or usage terms associated with:

The Qwen3 base model
The Qwen3.8-Max teacher provider
The distillation dataset
Upstream datasets from which prompts were sourced

Users are responsible for reviewing the base model license, the distillation dataset card, its provenance documentation, and any applicable upstream terms before use or redistribution.

Acknowledgements

This model builds upon work from:

The Qwen team for Qwen3-4B-Thinking-2507
r0b0tlab for the Qwen3.8-Max Distillation 50K dataset
Unsloth
Hugging Face Transformers and TRL

Citation

bibtex

@misc{r0b0tlab2026qwen38distillation50k,
  title        = {Qwen3.8-Max Distillation 50K},
  author       = {r0b0tlab},
  year         = {2026},
  publisher    = {Hugging Face},
  howpublished = {\url{https://huggingface.co/datasets/r0b0tlab/qwen3.8-max-distillation-50k}}
}

Disclaimer

Qwen3.8 4B Distilled is an independent community fine-tune by Ma7ee7.

It is not produced, endorsed, or officially released by the Qwen team, Alibaba, or Alibaba Cloud.

Ma7ee7/
Qwen3.8_4B_Distilled