Instructions to use google/diffusiongemma-26B-A4B-it with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use google/diffusiongemma-26B-A4B-it with Transformers:

# Use a pipeline as a high-level helper
from transformers import pipeline

pipe = pipeline("image-text-to-text", model="google/diffusiongemma-26B-A4B-it")
messages = [
    {
        "role": "user",
        "content": [
            {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/p-blog/candy.JPG"},
            {"type": "text", "text": "What animal is on the candy?"}
        ]
    },
]
pipe(text=messages)

# pip install -U transformers accelerate
# Load model directly
from transformers import AutoProcessor, AutoModelForMultimodalLM

processor = AutoProcessor.from_pretrained("google/diffusiongemma-26B-A4B-it")
model = AutoModelForMultimodalLM.from_pretrained("google/diffusiongemma-26B-A4B-it", device_map="auto")
messages = [
    {
        "role": "user",
        "content": [
            {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/p-blog/candy.JPG"},
            {"type": "text", "text": "What animal is on the candy?"}
        ]
    },
]
inputs = processor.apply_chat_template(
	messages,
	add_generation_prompt=True,
	tokenize=True,
	return_dict=True,
	return_tensors="pt",
).to(model.device)

outputs = model.generate(**inputs, max_new_tokens=256)
print(processor.decode(outputs[0][inputs["input_ids"].shape[-1]:]))

Notebooks
Google Colab
Kaggle
Local Apps Settings

vLLM

How to use google/diffusiongemma-26B-A4B-it with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "google/diffusiongemma-26B-A4B-it"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "google/diffusiongemma-26B-A4B-it",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'

Use Docker

docker model run hf.co/google/diffusiongemma-26B-A4B-it

SGLang

How to use google/diffusiongemma-26B-A4B-it with 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 "google/diffusiongemma-26B-A4B-it" \
    --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": "google/diffusiongemma-26B-A4B-it",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'

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 "google/diffusiongemma-26B-A4B-it" \
        --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": "google/diffusiongemma-26B-A4B-it",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'

Docker Model Runner
How to use google/diffusiongemma-26B-A4B-it with Docker Model Runner:
```
docker model run hf.co/google/diffusiongemma-26B-A4B-it
```

Misleading content in model names and model cards

#29

by Blackwood416 - opened Aug 31

Discussion

Blackwood416

Aug 31

The model name is diffusiongemma-26B-A4B-it, and the model card states that it activates 8 experts using MoE. However, the technical report clearly states that 84 experts will be activated, not 8. Therefore, I believe the model's name and model cards are highly misleading.

MaartenGr

Google org 7 days ago

Thanks for raising this! The difference you see relate to two different scopes:

Per-token routing (8 active experts per token / A4B): By standard MoE convention, A4B (~3.8B active parameters) and top-k = 8 refer to per-token activation. Every individual token in DiffusionGemma is routed to 8 experts out of 128 (plus 1 shared expert), identical to the Gemma 4 26B A4B architecture.
Canvas-level unique experts (~84 unique experts per 256-token canvas): Because DiffusionGemma denoises a block of 256 tokens in parallel on each forward pass (rather than 1 token at a time), each of the 256 tokens independently selects 8 experts. Across all 256 tokens in a canvas, the union of unique experts touched per layer averages ~84 out of 128 on PG-19 (the same effect seen in standard autoregressive MoE models during prefill, batched decoding, or speculative decoding verification). Figure 11 highlights this to explain HBM-to-SRAM memory bandwidth during a 256-token step (4.3× MoE kernel time to process 256× as many tokens).

MaartenGr changed discussion status to closed 7 days ago

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