How to use from
SGLang
Install from pip and serve model
# Install SGLang from pip:
pip install sglang
# Start the SGLang server:
python3 -m sglang.launch_server \
    --model-path "ModelCloud/gemma-2-27b-it-gptq-4bit" \
    --host 0.0.0.0 \
    --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "ModelCloud/gemma-2-27b-it-gptq-4bit",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'
Use Docker images
docker run --gpus all \
    --shm-size 32g \
    -p 30000:30000 \
    -v ~/.cache/huggingface:/root/.cache/huggingface \
    --env "HF_TOKEN=<secret>" \
    --ipc=host \
    lmsysorg/sglang:latest \
    python3 -m sglang.launch_server \
        --model-path "ModelCloud/gemma-2-27b-it-gptq-4bit" \
        --host 0.0.0.0 \
        --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "ModelCloud/gemma-2-27b-it-gptq-4bit",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'
Quick Links

This model has been quantized using GPTQModel.

  • bits: 4
  • group_size: 128
  • desc_act: true
  • static_groups: false
  • sym: true
  • lm_head: false
  • damp_percent: 0.01
  • true_sequential: true
  • model_name_or_path: ""
  • model_file_base_name: "model"
  • quant_method: "gptq"
  • checkpoint_format: "gptq"
  • meta:
    • quantizer: "gptqmodel:0.9.9-dev0"

Currently, only vllm can load the quantized gemma2-27b for proper inference. Here is an example:

import os
# Gemma-2 use Flashinfer backend for models with logits_soft_cap. Otherwise, the output might be wrong.
os.environ['VLLM_ATTENTION_BACKEND'] = 'FLASHINFER'

from transformers import AutoTokenizer
from gptqmodel import BACKEND, GPTQModel

model_name = "ModelCloud/gemma-2-27b-it-gptq-4bit"

prompt = [{"role": "user", "content": "I am in Shanghai, preparing to visit the natural history museum. Can you tell me the best way to"}]

tokenizer = AutoTokenizer.from_pretrained(model_name)

model = GPTQModel.from_quantized(
            model_name,
            backend=BACKEND.VLLM,
        )

inputs = tokenizer.apply_chat_template(prompt, tokenize=False, add_generation_prompt=True)
outputs = model.generate(prompts=inputs, temperature=0.95, max_length=128)
print(outputs[0].outputs[0].text)
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Model size
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Tensor type
I32
·
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