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qwen3-4b-structured-output-lora-v9 – AI Model by melon1891 | AlphaNeural AI

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melon1891/
qwen3-4b-structured-output-lora-v9

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structured-output

text-generation

u-10bei/structured_data_with_cot_dataset_512

Qwen/Qwen3-4B-Instruct-2507

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qwen3-4b-structured-output-lora-v9

This repository provides a LoRA adapter fine-tuned from Qwen/Qwen3-4B-Instruct-2507 using QLoRA (4-bit, Unsloth).

This repository contains LoRA adapter weights only. The base model must be loaded separately.

Training Objective

This adapter is trained to improve structured output accuracy (JSON / YAML / XML / TOML / CSV).

Loss is applied only to the final assistant output, while intermediate reasoning (Chain-of-Thought) is masked.

Training Configuration

Base model: Qwen/Qwen3-4B-Instruct-2507
Method: QLoRA (4-bit)
Max sequence length: 768
Epochs: 2
Learning rate: 2e-05
LoRA: r=8, alpha=8

Usage

python

from transformers import AutoModelForCausalLM, AutoTokenizer
from peft import PeftModel
import torch

base = "Qwen/Qwen3-4B-Instruct-2507"
adapter = "your_id/your-repo"

tokenizer = AutoTokenizer.from_pretrained(base)
model = AutoModelForCausalLM.from_pretrained(
    base,
    torch_dtype=torch.float16,
    device_map="auto",
)
model = PeftModel.from_pretrained(model, adapter)

Sources & Terms (IMPORTANT)

Training data:

u-10bei/structured_data_with_cot_dataset_512 (MIT License) - 3,445 samples

Preprocessing applied:

Removed system messages (eval format alignment)
Stripped CoT reasoning, kept Output section only
Converted to 2-turn format (user + assistant)

Compliance: Users must comply with the MIT license and the base model's original terms of use.