Gemma 3 12b It GPTQ 4b 128g

🚀 gemma-3-12b-it-GPTQ-4b-128g

This model is a quantized version of gemma-3-12b-it, optimizing disk space and GPU memory usage.

✨ Features

• Quantization Optimization: The model is created by quantizing the weights of gemma-3-12b-it to the INT4 data type. This reduces the bits per parameter from 16 to 4, cutting down the disk size and GPU memory requirements by about 75%.
• Selective Quantization: Only the weights of linear operators within language_model transformers blocks are quantized. The vision model and multimodal projection maintain their original precision.
• Quantization Scheme: Weights are quantized using a symmetric per - group scheme with a group size of 128, applying the GPTQ algorithm.
• Checkpoint Format: The model checkpoint is saved in compressed_tensors format.

📚 Documentation

Model Overview

This model was obtained by quantizing the weights of gemma-3-12b-it to INT4 data type. This optimization reduces the number of bits per parameter from 16 to 4, reducing the disk size and GPU memory requirements by approximately 75%.

Only the weights of the linear operators within language_model transformers blocks are quantized. Vision model and multimodal projection are kept in original precision. Weights are quantized using a symmetric per - group scheme, with group size 128. The GPTQ algorithm is applied for quantization.

Model checkpoint is saved in compressed_tensors format.

Evaluation

This model was evaluated on the OpenLLM v1 benchmarks. Model outputs were generated with the vLLM engine.

Reproduction

The results were obtained using the following commands:

MODEL=ISTA-DASLab/gemma-3-12b-it-GPTQ-4b-128g
MODEL_ARGS="pretrained=$MODEL,max_model_len=4096,tensor_parallel_size=1,dtype=auto,gpu_memory_utilization=0.80"

lm_eval \
  --model vllm \
  --model_args $MODEL_ARGS \
  --tasks openllm \
  --batch_size auto

💻 Usage Examples

Basic Usage

To use the model, you need to update the relevant packages:

• To use the model in transformers, update the package to the stable release of Gemma3: pip install git+https://github.com/huggingface/transformers@v4.49.0-Gemma-3
• To use the model in vLLM, update the package to the version after this PR.

Here is an example of inference via transformers:

# pip install accelerate

from transformers import AutoProcessor, Gemma3ForConditionalGeneration
from PIL import Image
import requests
import torch

model_id = "ISTA-DASLab/gemma-3-12b-it-GPTQ-4b-128g"

model = Gemma3ForConditionalGeneration.from_pretrained(
    model_id, device_map="auto"
).eval()

processor = AutoProcessor.from_pretrained(model_id)

messages = [
    {
        "role": "system",
        "content": [{"type": "text", "text": "You are a helpful assistant."}]
    },
    {
        "role": "user",
        "content": [
            {"type": "image", "image": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/bee.jpg"},
            {"type": "text", "text": "Describe this image in detail."}
        ]
    }
]

inputs = processor.apply_chat_template(
    messages, add_generation_prompt=True, tokenize=True,
    return_dict=True, return_tensors="pt"
).to(model.device, dtype=torch.bfloat16)

input_len = inputs["input_ids"].shape[-1]

with torch.inference_mode():
    generation = model.generate(**inputs, max_new_tokens=100, do_sample=False)
    generation = generation[0][input_len:]

decoded = processor.decode(generation, skip_special_tokens=True)
print(decoded)

# **Overall Impression:** The image is a close-up shot of a vibrant garden scene, 
# focusing on a cluster of pink cosmos flowers and a busy bumblebee. 
# It has a slightly soft, natural feel, likely captured in daylight.

📄 License

The license of this model is gemma.