README.md

---
language:
- en
- zh
license: apache-2.0
tags:
- qwen2.5
- dpo
- human-like
- conversational
base_model: Qwen/Qwen2.5-7B-Instruct
library_name: transformers
---

# Qwen2.5-7B Human-like DPO

Fine-tuned [Qwen2.5-7B-Instruct](https://huggingface.co/Qwen/Qwen2.5-7B-Instruct) with DPO for more natural, empathetic conversations.

## 🚀 Quick Start
```python
from transformers import AutoTokenizer, AutoModelForCausalLM
import torch

model = AutoModelForCausalLM.from_pretrained(
    "ruijiewang45401/qwen2.5-7b-humanlike-dpo",
    torch_dtype=torch.bfloat16,
    device_map="auto"
)
tokenizer = AutoTokenizer.from_pretrained("ruijiewang45401/qwen2.5-7b-humanlike-dpo")

messages = [
    {"role": "system", "content": "You are a warm and helpful assistant."},
    {"role": "user", "content": "Hello!"}
]

text = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
inputs = tokenizer(text, return_tensors="pt").to("cuda")

outputs = model.generate(
    **inputs,
    max_new_tokens=200,
    temperature=0.8,
    top_p=0.9,
    do_sample=True
)

print(tokenizer.decode(outputs[0], skip_special_tokens=True))
```

## 📊 Training Details

- **Base Model**: Qwen2.5-7B-Instruct
- **Method**: DPO with LoRA (r=16, alpha=32)
- **Dataset**: [HumanLLMs/Human-Like-DPO-Dataset](https://huggingface.co/datasets/HumanLLMs/Human-Like-DPO-Dataset)
- **Training Samples**: 10,339
- **Hardware**: NVIDIA A100 40GB
- **Training Time**: ~1.5 hours

### Hyperparameters

| Parameter | Value |
|-----------|-------|
| Beta | 0.1 |
| Learning Rate | 5e-5 |
| Batch Size | 2 × 8 |
| Max Length | 1024 |
| Epochs | 1 |
| Optimizer | AdamW |
| Scheduler | Cosine |

### Results

- **Rewards/Margins**: 6.87
- **Accuracy**: 1.0
- **Val Loss**: ~0.00003

## 💡 Generation Parameters
```python
model.generate(
    **inputs,
    max_new_tokens=150-300,
    temperature=0.7-0.9,     # Higher = more natural
    top_p=0.9,
    repetition_penalty=1.1,
    do_sample=True
)
```

## 📜 Citation
```bibtex
@misc{qwen25-humanlike-dpo,
  author = {ruijiewang45401},
  title = {Qwen2.5-7B Human-like DPO},
  year = {2025},
  publisher = {Hugging Face},
  url = {https://huggingface.co/ruijiewang45401/qwen2.5-7b-humanlike-dpo}
}
```

## 🙏 Credits

- [Qwen Team](https://huggingface.co/Qwen)
- [HumanLLMs Dataset](https://huggingface.co/datasets/HumanLLMs/Human-Like-DPO-Dataset)
- [TRL Library](https://github.com/huggingface/trl)