This model is a fine-tuned version of Qwen2.5-1.5B-Instruct, designed for mathematical problem-solving and structured reasoning. It is trained on an enhanced GSM8K dataset incorporating Chain-of-Thought (CoT) reasoning augmented by DeepSeek AI.

Key Features

Base Model: Qwen2.5-1.5B-Instruct
Fine-Tuned On: GSM8K enhanced with DeepSeek-V3
Optimized for: Logical problem-solving and math reasoning
Fine-tuning method: LoRA (Low-Rank Adaptation)
Inference-ready: Available on Hugging Face and compatible with llama.cpp
Supports GGUF: Optimized versions for Q4_K_M, Q8_0, Q5_K_M, and FP16

Model Details

Developed by: Yiqiao Yin
Model Type: Causal Language Model (Text Generation)
Languages: English (en)
License: MIT License
Fine-tuned from: Qwen/Qwen2.5-1.5B-Instruct
Training Library: transformers + unsloth + trl
Quantization: GGUF (Q4_K_M, Q8_0, Q5_K_M, f16)

🔗 Hugging Face Repository:
👉 Fine-tuned Qwen2.5-1.5B-Instruct

How to Use the Model

Using `transformers` in Python

You may need to install bitsandbytes by using

! pip install -U bitsandbytes

Then you can use the following code to run inference.

python

from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

# Load model and tokenizer
model_name = "eagle0504/qwen-2_5-1_5b-instruct-using-openai-gsm8k-data-enhanced-with-deepseek-v2"
tokenizer = AutoTokenizer.from_pretrained(model_name)
model = AutoModelForCausalLM.from_pretrained(model_name)

# Move model to GPU if available
device = "cuda" if torch.cuda.is_available() else "cpu"
model.to(device)

# Example inference
question = "Natalia sold clips to 48 of her friends in April, and then she sold half as many clips in May. How many clips did Natalia sell altogether in April and May?"
inputs = tokenizer(question, return_tensors="pt").to(device)
output = model.generate(**inputs, max_length=200)

# Decode response
print(tokenizer.decode(output[0], skip_special_tokens=True))

Running the Model with `llama.cpp`

Step 1: Install `llama.cpp`

brew install llama.cpp

Step 2: Download the Model

mkdir -p ~/llama_models && cd ~/llama_models
wget https://huggingface.co/eagle0504/qwen-2_5-1_5b-instruct-using-openai-gsm8k-data-enhanced-with-deepseek-v2/resolve/main/q8_0.gguf

Step 3: Run the Model

llama-cli -m ~/llama_models/q8_0.gguf --interactive

Or you can use the following:

llama-cli -hf eagle0504/qwen-2_5-1_5b-instruct-using-openai-gsm8k-data-enhanced-with-deepseek-v2:Q8_0

Step 4: Test with a Prompt

llama-cli -m ~/llama_models/q8_0.gguf -p "Explain quantum computing in simple terms."

Training Details

Custom Reward

python

def count_xml(text: str) -> float:
    """
    Calculates a reward based on the occurrence of certain XML tags and subtracts penalties for content after closing tags.

    Args:
    text (str): The text string to analyze for XML tag consistency.

    Returns:
    float: Total reward score based on XML tag occurrence and penalties.
    """
    count = 0.0
    if text.count("<think>\n") == 1:
        count += 0.125
    if text.count("\n</think>\n") == 1:
        count += 0.125
    if text.count("\n<answer>\n") == 1:
        count += 0.125
        count -= len(text.split("\n</answer>\n")[-1])*0.001
    if text.count("\n</answer>") == 1:
        count += 0.125
        count -= (len(text.split("\n</answer>")[-1]) - 1)*0.001

    # Ensure `<think>` and `</think>` exist
    if "<think>" in text and "</think>" in text:
        count += 1.0  # Higher weight to ensure reasoning consistency
    else:
        count -= 1.0  # Penalize if missing

    return count

Each component contributes to the total reward if conditions are met:

Condition	Reward
`"<think>\n"` appears exactly once	+0.125
`"\n</think>\n"` appears exactly once	+0.125
`"\n<answer>\n"` appears exactly once	+0.125
`"\n</answer>"` appears exactly once	+0.125
Both `<think>` and `</think>` exist anywhere	+1.0
No extra text after `"</answer>"`	No penalty

Total possible reward before penalties: [ 0.125 + 0.125 + 0.125 + 0.125 + 1.0 = 1.5 ]

Potential Penalties The function applies penalties for extra content after "</answer>": [ -\left( \text{length of extra text} \times 0.001 \right) ] If the best case occurs (i.e., no extra content), then:

Penalty = 0
Final Reward = 1.5 (no deductions)

Best Possible Input Example This ideal input gives the highest possible reward:

xml

<think>
Valid reasoning goes here.
</think>

<answer>
Correct final answer here.
</answer>

This means we customize the reward function so that we encourage the answer to have reasoning inside. We also know mathematically what the reward should be so we can monitor it during training process.

Dataset Used

The model was fine-tuned on:
🔹 eagle0504/openai-gsm8k-enhanced-using-together-ai-deepseek-train8k-test1k-v1

This dataset contains:

8K training samples
1K testing samples
Features: question, answer, cot (Chain-of-Thought)

Training Configuration

Framework: transformers + unsloth + trl
Optimization: LoRA applied to QKV projections
Learning Rate: 1e-6
AdamW Optimizer (8-bit)
Mixed Precision (bf16 or fp16)
Batch Size: 8
Max Sequence Length: 1024

Model Performance

Training Loss

Step	XML Count
10	-1
100	-1
500	-0.6421
750	0.7611
1000	1.0506

As we can see, after 1000 steps, we see the reward of XML Count is above 1, which is getting good. This took about 1h 46min 50s on a T4 GPU in Colab with High RAM.

Bias, Risks, and Limitations

Potential Risks

May hallucinate incorrect reasoning steps if prompts are unclear.
Could struggle with complex mathematical problems outside its training data.
Limited generalization to non-math reasoning tasks.

Recommendations

If using this model for critical applications, verify outputs with human review.
For better performance, fine-tune on larger datasets with real-world numerical reasoning.

Environmental Impact

Estimated Carbon Emissions:

Hardware Used: NVIDIA A100 GPU
Training Time: ~5 hours
Estimated CO2 Emitted: ~8.2 kg CO2eq (via ML Impact Calculator)

Citation

Upcoming

Contact

For questions, suggestions, or issues, reach out via Hugging Face Discussions.

🎉 Thank you for using this model! If you find it useful, please ⭐ it on Hugging Face! 🚀🔥

eagle0504/qwen-2_5-1_5b-instruct-using-openai-gsm8k-data-enhanced-with-deepseek-v2

Qwen2.5-1.5B-Instruct Fine-Tuned on GSM8K with DeepSeek Augmentation

Model Overview