# 🚀 SuperNova Medius Compressed Model (W4A16)

[![Model Size](https://img.shields.io/badge/Size-Compressed-green)]()
[![Quantization](https://img.shields.io/badge/Quantization-W4A16-blue)]()
[![Max Sequence Length](https://img.shields.io/badge/Max%20Length-4096-orange)]()

> **Model ID**: `arcee-ai/SuperNova-Medius-CM-w4a16`

## 📋 Table of Contents
- [Overview](#overview)
- [Quick Start](#quick-start)
- [Model Details](#model-details)
- [Usage Guide](#usage-guide)
- [Quantization Process](#quantization-process)
- [Performance & Benchmarks](#performance--benchmarks)
- [Technical Details](#technical-details)
- [Limitations & Biases](#limitations--biases)
- [Citations & Acknowledgements](#citations--acknowledgements)

## 🔍 Overview

SuperNova Medius CM W4A16 is a quantized version of the `arcee-ai/SuperNova-Medius` model, optimized for efficient deployment. Using GPTQ (Generalized Post-Training Quantization), we've achieved significant size reduction while maintaining near-original performance.

### ✨ Key Features
- 4-bit weight quantization
- 16-bit activation quantization
- 4096 token context window
- Optimized for deployment on consumer hardware

## 🚀 Quick Start

```python
from transformers import AutoTokenizer, AutoModelForCausalLM

# Load model and tokenizer
tokenizer = AutoTokenizer.from_pretrained("arcee-ai/SuperNova-Medius-CM-w4a16")
model = AutoModelForCausalLM.from_pretrained("arcee-ai/SuperNova-Medius-CM-w4a16")

# Simple inference
text = "Hello, how are you?"
inputs = tokenizer(text, return_tensors="pt")
outputs = model.generate(**inputs)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))
```

## 📊 Model Details

### Specifications
- **Base Model**: arcee-ai/SuperNova-Medius
- **Quantization Method**: GPTQ
- **Maximum Sequence Length**: 4096
- **Calibration Samples**: 1024

### Quantization Parameters
| Parameter | Value |
|-----------|--------|
| Weight Bits | 4 |
| Activation Bits | 16 |
| Ignored Layers | lm_head |
| Dampening Fraction | 0.1 |
| Calibration Dataset | neuralmagic/LLM_compression_calibration |

## 💻 Usage Guide

### Basic Usage
See Quick Start section above.

### Advanced Usage

```python
# Advanced generation with parameters
output = model.generate(
    input_ids,
    max_length=100,
    num_beams=4,
    temperature=0.7,
    no_repeat_ngram_size=2,
    do_sample=True
)
```

### Memory Optimization

```python
# Load model with device map for multi-GPU setup
model = AutoModelForCausalLM.from_pretrained(
    "arcee-ai/SuperNova-Medius-CM-w4a16",
    device_map="auto",
    torch_dtype=torch.bfloat16
)
```

## ⚙️ Quantization Process

```python
import torch
from datasets import load_dataset
from transformers import AutoTokenizer
from llmcompressor.modifiers.quantization import GPTQModifier
from llmcompressor.transformers import SparseAutoModelForCausalLM, oneshot
from llmcompressor.transformers.compression.helpers import calculate_offload_device_map

# Configuration
MODEL_ID = "arcee-ai/SuperNova-Medius"
NUM_SAMPLES = 1024
MAX_LENGTH = 4096
SEED = 42

# Calculate device map
device_map = calculate_offload_device_map(
    MODEL_ID,
    num_gpus=torch.cuda.device_count(),
    reserve_for_hessians=True,
    torch_dtype=torch.bfloat16
)

# Load model and tokenizer
model = SparseAutoModelForCausalLM.from_pretrained(
    MODEL_ID,
    device_map=device_map,
    torch_dtype=torch.bfloat16
)
tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)

# Prepare calibration dataset
ds = load_dataset("neuralmagic/LLM_compression_calibration")
ds = ds["train"].shuffle(seed=SEED).select(range(NUM_SAMPLES))

def preprocess(example):
    return {"text": tokenizer.apply_chat_template(example["messages"], tokenize=False)}

ds = ds.map(preprocess)

def tokenize(sample):
    return tokenizer(
        sample["text"],
        padding=False,
        max_length=MAX_LENGTH,
        truncation=True,
        add_special_tokens=False
    )

ds = ds.map(tokenize)

# Configure quantization
recipe = GPTQModifier(
    targets="Linear",
    scheme="W4A16",
    ignore=["lm_head"],
    dampening_frac=0.1
)

# Execute quantization
oneshot(
    model=model,
    dataset=ds,
    recipe=recipe,
    oneshot_device=device_map,
    max_seq_length=MAX_LENGTH,
    num_calibration_samples=NUM_SAMPLES,
    accelerator_config={
        'split_batches': True,
        'dispatch_batches': None,
        'even_batches': True,
        'use_seedable_sampler': True,
        'non_blocking': False,
        'gradient_accumulation_kwargs': None,
        'use_configured_state': False
    }
)

# Save quantized model
model.save_pretrained("./arcee-ai/SuperNova-Medius-CM-w4a16", save_compressed=True)
tokenizer.save_pretrained("./arcee-ai/SuperNova-Medius-CM-w4a16")
```

## 🛠️ Technical Details

### Dependencies
| Package | Version |
|---------|---------|
| Python | 3.9.x |
| torch | 2.5.1 |
| transformers | 4.46.2 |
| llmcompressor | 0.5.0 |
| vllm | 0.6.4 |
| datasets | 3.1.0 |
| huggingface_hub | 0.24.7 |
| compressed-tensors | 0.8.0 |

### Hardware Requirements
- **Minimum**: 8GB VRAM
- **Recommended**: 16GB VRAM
- **Optimal**: 24GB VRAM or multiple GPUs

## ⚠️ Limitations & Biases

### Known Limitations
- Slight performance degradation compared to full-precision model
- Limited to 4096 token context window
- May require careful memory management on consumer GPUs

### Inherited Biases
- Carries over biases from base model
- Users should implement appropriate content filtering
- Regular evaluation recommended for production deployments

## 📚 Citations & Acknowledgements

### Citation

```bibtex
@misc{SuperNovaMediusCMW4A16,
  author = {Edward Kim and Jaro Uljanovs},
  title = {SuperNova Medius Compressed Model W4A16},
  year = {2024},
  howpublished = {\url{https://huggingface.co/ConfidentialMind/arcee-ai-SuperNova-Medius-CM-w4a16}},
}
```

### 👏 Acknowledgements
- Original Model: arcee-ai/SuperNova-Medius
- Quantization Tools: LLM Compressor
- Contributors: Edward Kim and Jaro Uljanovs

---

## 📝 Version History

- v1.0.0 (2024-03): Initial release
- v1.0.1 (2024-03): Documentation updates