---
base_model: google/gemma-2-9b-it
license: gemma
language:
- en
library_name: transformers
pipeline_tag: text-generation
tags:
- gemma2
- google
- autoawq
---

> [!IMPORTANT]
> This repository is a community-driven quantized version of the original model [`google/gemma-2-9b-it`](https://huggingface.co/google/gemma-2-9b-it) which is the BF16 half-precision official version released by Google.

> [!WARNING]
> This model has been quantized using `transformers` 4.45.0, meaning that the tokenizer available in this repository won't be compatible with lower versions. Same applies for e.g. Text Generation Inference (TGI) that only installs `transformers` 4.45.0 or higher starting in v2.3.1.

## Model Information

Gemma is a family of lightweight, state-of-the-art open models from Google, built from the same research and technology used to create the Gemini models. They are text-to-text, decoder-only large language models, available in English, with open weights for both pre-trained variants and instruction-tuned variants. Gemma models are well-suited for a variety of text generation tasks, including question answering, summarization, and reasoning. Their relatively small size makes it possible to deploy them in environments with limited resources such as a laptop, desktop or your own cloud infrastructure, democratizing access to state of the art AI models and helping foster innovation for everyone.

This repository contains [`google/gemma-2-9b-it`](https://huggingface.co/google/gemma-2-9b-it) quantized using [AutoAWQ](https://github.com/casper-hansen/AutoAWQ) from FP16 down to INT4 using the GEMM kernels performing zero-point quantization with a group size of 128.

## Model Usage

> [!NOTE]
> In order to run the inference with Gemma2 9B Instruct AWQ in INT4, around 6 GiB of VRAM are needed only for loading the model checkpoint, without including the KV cache or the CUDA graphs, meaning that there should be a bit over that VRAM available.

In order to use the current quantized model, support is offered for different solutions as `transformers`, `autoawq`, or `text-generation-inference`.

### 🤗 Transformers

In order to run the inference with Gemma2 9B Instruct AWQ in INT4, you need to install the following packages:

```bash
pip install -q --upgrade "transformers>=4.45.0" accelerate
INSTALL_KERNELS=1 pip install -q git+https://github.com/casper-hansen/AutoAWQ.git@79547665bdb27768a9b392ef375776b020acbf0c
```

To run the inference on top of Gemma2 9B Instruct AWQ in INT4 precision, the AWQ model can be instantiated as any other causal language modeling model via `AutoModelForCausalLM` and run the inference normally.

```python
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer, AwqConfig

model_id = "hugging-quants/gemma-2-9b-it-AWQ-INT4"

quantization_config = AwqConfig(
    bits=4,
    fuse_max_seq_len=512, # Note: Update this as per your use-case
    do_fuse=True,
)

tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(
  model_id,
  torch_dtype=torch.float16,
  low_cpu_mem_usage=True,
  device_map="auto",
  quantization_config=quantization_config
)

prompt = [
  {"role": "user", "content": "What's Deep Learning?"},
]
inputs = tokenizer.apply_chat_template(
  prompt,
  tokenize=True,
  add_generation_prompt=True,
  return_tensors="pt",
  return_dict=True,
).to("cuda")

outputs = model.generate(**inputs, do_sample=True, max_new_tokens=256)
print(tokenizer.batch_decode(outputs[:, inputs['input_ids'].shape[1]:], skip_special_tokens=True)[0])
```

### AutoAWQ

In order to run the inference with Gemma2 9B Instruct AWQ in INT4, you need to install the following packages:

```bash
pip install -q --upgrade "transformers>=4.45.0" accelerate
INSTALL_KERNELS=1 pip install -q git+https://github.com/casper-hansen/AutoAWQ.git@79547665bdb27768a9b392ef375776b020acbf0c
```

Alternatively, one may want to run that via `AutoAWQ` even though it's built on top of 🤗 `transformers`, which is the recommended approach instead as described above.

```python
import torch
from awq import AutoAWQForCausalLM
from transformers import AutoModelForCausalLM, AutoTokenizer

model_id = "hugging-quants/gemma-2-9b-it-AWQ-INT4"
tokenizer = AutoTokenizer.from_pretrained(model_id)
model = AutoAWQForCausalLM.from_pretrained(
  model_id,
  torch_dtype=torch.float16,
  low_cpu_mem_usage=True,
  device_map="auto",
)

prompt = [
  {"role": "user", "content": "What's Deep Learning?"},
]
inputs = tokenizer.apply_chat_template(
  prompt,
  tokenize=True,
  add_generation_prompt=True,
  return_tensors="pt",
  return_dict=True,
).to("cuda")

outputs = model.generate(**inputs, do_sample=True, max_new_tokens=256)
print(tokenizer.batch_decode(outputs[:, inputs['input_ids'].shape[1]:], skip_special_tokens=True)[0])
```

The AutoAWQ script has been adapted from [`AutoAWQ/examples/generate.py`](https://github.com/casper-hansen/AutoAWQ/blob/main/examples/generate.py).

### 🤗 Text Generation Inference (TGI)

To run the `text-generation-launcher` with Gemma2 9B Instruct AWQ in INT4 with Marlin kernels for optimized inference speed, you will need to have Docker installed (see [installation notes](https://docs.docker.com/engine/install/)).

Then you just need to run the TGI v2.3.0 (or higher) Docker container as follows:

```bash
docker run --gpus all --shm-size 1g -ti -p 8080:80 \
  -v hf_cache:/data \
  -e MODEL_ID=hugging-quants/gemma-2-9b-it-AWQ-INT4 \
  -e QUANTIZE=awq \
  -e MAX_INPUT_LENGTH=4000 \
  -e MAX_TOTAL_TOKENS=4096 \
  ghcr.io/huggingface/text-generation-inference:2.3.0
```

> [!NOTE]
> TGI will expose different endpoints, to see all the endpoints available check [TGI OpenAPI Specification](https://huggingface.github.io/text-generation-inference/#/).

To send request to the deployed TGI endpoint compatible with [OpenAI OpenAPI specification](https://github.com/openai/openai-openapi) i.e. `/v1/chat/completions`:

```bash
curl 0.0.0.0:8080/v1/chat/completions \
  -X POST \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "tgi",
    "messages": [
      {
        "role": "user",
        "content": "What is Deep Learning?"
      }
    ],
    "max_tokens": 128
  }'
```

Or programatically via the `huggingface_hub` Python client as follows:

```python
import os
from huggingface_hub import InferenceClient

client = InferenceClient(base_url="http://0.0.0.0:8080", api_key="-")

chat_completion = client.chat.completions.create(
  model="hugging-quants/gemma-2-9b-it-AWQ-INT4",
  messages=[
    {"role": "user", "content": "What is Deep Learning?"},
  ],
  max_tokens=128,
)
```

Alternatively, the OpenAI Python client can also be used (see [installation notes](https://github.com/openai/openai-python?tab=readme-ov-file#installation)) as follows:

```python
import os
from openai import OpenAI

client = OpenAI(base_url="http://0.0.0.0:8080/v1", api_key="-")

chat_completion = client.chat.completions.create(
  model="tgi",
  messages=[
    {"role": "user", "content": "What is Deep Learning?"},
  ],
  max_tokens=128,
)
```

### vLLM

To run vLLM with Gemma2 9B Instruct AWQ in INT4, you will need to have Docker installed (see [installation notes](https://docs.docker.com/engine/install/)) and run the latest vLLM Docker container as follows:

```bash
docker run --runtime nvidia --gpus all --ipc=host -p 8000:8000 \
  -v hf_cache:/root/.cache/huggingface \
  vllm/vllm-openai:latest \
  --model hugging-quants/gemma-2-9b-it-AWQ-INT4 \
  --max-model-len 4096
```

To send request to the deployed vLLM endpoint compatible with [OpenAI OpenAPI specification](https://github.com/openai/openai-openapi) i.e. `/v1/chat/completions`:

```bash
curl 0.0.0.0:8000/v1/chat/completions \
  -X POST \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "hugging-quants/gemma-2-9b-it-AWQ-INT4",
    "messages": [
      {
        "role": "user",
        "content": "What is Deep Learning?"
      }
    ],
    "max_tokens": 128
  }'
```

Or programatically via the `openai` Python client (see [installation notes](https://github.com/openai/openai-python?tab=readme-ov-file#installation)) as follows:

```python
import os
from openai import OpenAI

client = OpenAI(base_url="http://0.0.0.0:8000/v1", api_key=os.getenv("VLLM_API_KEY", "-"))

chat_completion = client.chat.completions.create(
  model="hugging-quants/gemma-2-9b-it-AWQ-INT4",
  messages=[
    {"role": "user", "content": "What is Deep Learning?"},
  ],
  max_tokens=128,
)
```

## Quantization Reproduction

> [!IMPORTANT]
> In order to quantize Gemma2 9B Instruct using AutoAWQ, you will need to use an instance with at least enough CPU RAM to fit the whole model i.e. ~20GiB, and an NVIDIA GPU with 16GiB of VRAM to quantize it.
>
> Additionally, you also need to accept the Gemma2 access conditions, as it is a gated model that requires accepting those first. 

In order to quantize Gemma2 9B Instruct, first install the following packages:

```bash
pip install -q --upgrade "torch==2.3.0" "transformers>=4.45.0" accelerate
INSTALL_KERNELS=1 pip install -q git+https://github.com/casper-hansen/AutoAWQ.git@79547665bdb27768a9b392ef375776b020acbf0c
```

Then you need to install the `huggingface_hub` Python SDK and login to the Hugging Face Hub.

```bash
pip install -q --upgrade huggingface_hub
huggingface-cli login
```

Then run the following script, adapted from [`AutoAWQ/examples/quantize.py`](https://github.com/casper-hansen/AutoAWQ/blob/main/examples/quantize.py):

```python
from awq import AutoAWQForCausalLM
from transformers import AutoTokenizer

model_path = "google/gemma-2-9b-it"
quant_path = "hugging-quants/gemma-2-9b-it-AWQ-INT4"
quant_config = {
  "zero_point": True,
  "q_group_size": 128,
  "w_bit": 4,
  "version": "GEMM",
}

# Load model
model = AutoAWQForCausalLM.from_pretrained(
  model_path, low_cpu_mem_usage=True, use_cache=False,
)
tokenizer = AutoTokenizer.from_pretrained(model_path)

# Quantize
model.quantize(tokenizer, quant_config=quant_config)

# Save quantized model
model.save_quantized(quant_path)
tokenizer.save_pretrained(quant_path)

print(f'Model is quantized and saved at "{quant_path}"')
```