---
library_name: transformers
tags:
- qlora
- quantization
- 4bit
- causal-lm
- transformers
- mcqa
- dpo
- multiple-choice
- w4a16
- hf-trained
---

# MNLP M3 - Quantized DPO + MCQA Model (W4A16, QLoRA)

This model is a quantized and QLoRA-fine-tuned version of the base `albertfares/MNLP_SFT_DPO` model. It is trained on curated stabilization data for multiple-choice question answering (MCQA) using LoRA adapters over 4-bit weights and 16-bit activations (W4A16).

It was developed as part of the CS-552 Multilingual NLP course at EPFL and is hosted for reproducible evaluation and downstream use.

## Model Details

### Model Description

This model adapts the `MNLP_SFT_DPO` model to handle complex MCQA reasoning using QLoRA (4-bit weights, 16-bit activations). It was trained using the quantized dataset [`abdou-u/MNLP_M3_quantized_dataset`](https://huggingface.co/datasets/abdou-u/MNLP_M3_quantized_dataset) and aims to strike a strong balance between memory efficiency and downstream accuracy.

- **Developed by:** Ahmed Abdelmalek
- **Finetuned from model:** `albertfares/MNLP_SFT_DPO`
- **Model type:** Causal Language Model (decoder-only, autoregressive)
- **Language(s):** English
- **License:** Apache 2.0

### Model Sources

- **Training Code:** Private GitHub Repository
- **Datasets:** [`abdou-u/MNLP_M3_quantized_dataset`](https://huggingface.co/datasets/abdou-u/MNLP_M3_quantized_dataset)
- **Base Model:** albertfares/MNLP_SFT_DPO

## Uses

### Direct Use

This model can be directly used for answering multiple-choice questions (MCQA) in English with a short explanation output.

### Downstream Use

Can be used in LLM pipelines requiring lightweight MCQA reasoning models with high accuracy and low VRAM cost.

### Out-of-Scope Use

Not intended for generative open-ended long-form answers or other modalities beyond multiple-choice QA.

## Bias, Risks, and Limitations

The model inherits biases from both the base DPO model and the MCQA dataset. It may underperform on non-English inputs or ambiguous multi-answer tasks.

### Recommendations

Use as part of a controlled QA system with additional verification modules. Do not use in high-stakes decision-making without human oversight.

## How to Get Started with the Model

```python
from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained("abdou-u/MNLP_M3_quantized_dpo_mcqa_model")
tokenizer = AutoTokenizer.from_pretrained("abdou-u/MNLP_M3_quantized_dpo_mcqa_model")
```

## Training Details

### Training Data

This model was fine-tuned using the `abdou-u/MNLP_M3_quantized_dataset`, a mix of formatted MCQA questions from TheoremQA, AQuA, and synthetic examples with explanations.

### Training Procedure

The model was fine-tuned using QLoRA with:
- 4-bit NF4 quantization (W4A16)
- `r=16`, `alpha=32`, and dropout=0.05
- 1–2 epochs on the quantized dataset

#### Training Hyperparameters

- **Precision:** FP16 with QLoRA (W4A16)
- **Epochs:** 1–2
- **Batch size:** 8 (gradient accumulation: 4)
- **LR:** 2e-5

## Evaluation

### Testing Data

The model was evaluated on a diverse set of MCQA tasks:
- **MMLU** (16 subjects including Math, Physics, Bio, CS)
- **NLP4Education**

Tasks were tested under:
- **Zero-shot settings**
- **Few-shot settings** (2-shot context)

### Metrics

- Accuracy (for multiple-choice selection)
- Log-likelihood ranking (optional)

### Results

- Strong zero-shot and few-shot MCQA performance on MMLU benchmarks
- Robust to reasoning under minimal context

## Environmental Impact

- **Hardware Type:** NVIDIA A100 80GB x2
- **Hours Used:** ~0.5–1h
- **Cloud Provider:** EPFL RCP
- **Region:** Switzerland
- **Carbon Emitted:** Estimated < 0.5 kg CO2

## Technical Specifications

### Model Architecture

Quantized transformer decoder using QLoRA over the DPO-finetuned SFT model.

### Compute Infrastructure

- **Hardware:** 2x A100 80GB
- **Software:** PyTorch, Transformers, PEFT, Datasets, Huggingface Hub

## Citation

**APA:**
Ahmed Abdelmalek. (2025). MNLP_M3_quantized_dpo_mcqa_model [Computer software]. Hugging Face.

**BibTeX:**
@misc{abdelmalek2025quantizeddpo,
  author = {Ahmed Abdelmalek},
  title = {MNLP_M3_quantized_dpo_mcqa_model},
  year = {2025},
  publisher = {Hugging Face},
  howpublished = {\url{https://huggingface.co/abdou-u/MNLP_M3_quantized_dpo_mcqa_model}}
}

## Model Card Contact

For questions, contact: ahmed.abdelmalek@epfl.ch