Instructions to use google/gemma-4-31B-it with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use google/gemma-4-31B-it with Transformers:

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

pipe = pipeline("image-text-to-text", model="google/gemma-4-31B-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)

# Load model directly
from transformers import AutoProcessor, AutoModelForImageTextToText

processor = AutoProcessor.from_pretrained("google/gemma-4-31B-it")
model = AutoModelForImageTextToText.from_pretrained("google/gemma-4-31B-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?"}
        ]
    },
]
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=40)
print(processor.decode(outputs[0][inputs["input_ids"].shape[-1]:]))

Inference
HuggingChat
Notebooks
Google Colab
Kaggle
AMD Developer Cloud
Local Apps

vLLM

How to use google/gemma-4-31B-it with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "google/gemma-4-31B-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/gemma-4-31B-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/gemma-4-31B-it

SGLang

How to use google/gemma-4-31B-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/gemma-4-31B-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/gemma-4-31B-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/gemma-4-31B-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/gemma-4-31B-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/gemma-4-31B-it with Docker Model Runner:
```
docker model run hf.co/google/gemma-4-31B-it
```

sigjhl commited on 27 days ago

Commit

beaa600

verified ·

1 Parent(s): 145dc25

Update chat_template.jinja

Browse files

This updates the Gemma chat_template.jinja tool declaration rendering so nullable referenced JSON Schema fields (in common constructs likely to matter for tool declarations) are not collapsed into empty type declarations.

Files changed (1) hide show

chat_template.jinja +50 -11

chat_template.jinja CHANGED Viewed

@@ -11,12 +11,39 @@
                 description:<|"|>{{ value['description'] }}<|"|>
                 {%- set add_comma = true -%}
             {%- endif -%}
-            {%- if value['type'] | upper == 'STRING' -%}
-                {%- if value['enum'] -%}
-                    {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
-                    enum:{{ format_argument(value['enum']) }}
                 {%- endif -%}
-            {%- elif value['type'] | upper == 'ARRAY' -%}
                 {%- if value['items'] is mapping and value['items'] -%}
                     {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                     items:{
@@ -52,11 +79,11 @@
                     }
                 {%- endif -%}
             {%- endif -%}
-            {%- if value['nullable'] %}
                 {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                 nullable:true
             {%- endif -%}
-            {%- if value['type'] | upper == 'OBJECT' -%}
                 {%- if value['properties'] is defined and value['properties'] is mapping -%}
                     {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                     properties:{
@@ -68,7 +95,7 @@
                     {{- format_parameters(value, value['required'] | default([]), filter_keys=true) -}}
                     }
                 {%- endif -%}
-                {%- if value['required'] -%}
                     {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                     required:[
                     {%- for item in value['required'] | default([]) -%}
@@ -78,8 +105,15 @@
                     ]
                 {%- endif -%}
             {%- endif -%}
-            {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
-            type:<|"|>{{ value['type'] | upper }}<|"|>}
         {%- endif -%}
     {%- endfor -%}
 {%- endmacro -%}
@@ -91,6 +125,9 @@
         {%- if params['properties'] -%}
             properties:{ {{- format_parameters(params['properties'], params['required']) -}} },
         {%- endif -%}
         {%- if params['required'] -%}
             required:[
             {%- for item in params['required'] -%}
@@ -120,6 +157,8 @@
         {{- '<|"|>' + argument + '<|"|>' -}}
     {%- elif argument is boolean -%}
         {{- 'true' if argument else 'false' -}}
     {%- elif argument is mapping -%}
         {{- '{' -}}
         {%- set ns = namespace(found_first=false) -%}
@@ -351,4 +390,4 @@
             {{- '<|channel>thought\n<channel|>' -}}
         {%- endif -%}
     {%- endif -%}
-{%- endif -%}

                 description:<|"|>{{ value['description'] }}<|"|>
                 {%- set add_comma = true -%}
             {%- endif -%}
+            {%- set type_names = namespace(names=[]) -%}
+            {%- if value['type'] is defined and value['type'] -%}
+                {%- if value['type'] is string -%}
+                    {%- set type_names.names = [value['type'] | upper] -%}
+                {%- else -%}
+                    {%- set type_names.names = value['type'] | map('upper') | list -%}
                 {%- endif -%}
+            {%- endif -%}
+            {%- if value['anyOf'] is defined and value['anyOf'] -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                anyOf:{{ format_argument(value['anyOf'], escape_keys=false) }}
+            {%- endif -%}
+            {%- if value['oneOf'] is defined and value['oneOf'] -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                oneOf:{{ format_argument(value['oneOf'], escape_keys=false) }}
+            {%- endif -%}
+            {%- if value['allOf'] is defined and value['allOf'] -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                allOf:{{ format_argument(value['allOf'], escape_keys=false) }}
+            {%- endif -%}
+            {%- if value['$ref'] is defined and value['$ref'] -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                $ref:<|"|>{{ value['$ref'] }}<|"|>
+            {%- endif -%}
+            {%- if value['enum'] is defined and value['enum'] -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                enum:{{ format_argument(value['enum']) }}
+            {%- endif -%}
+            {%- if value['const'] is defined -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                const:{{ format_argument(value['const'], escape_keys=false) }}
+            {%- endif -%}
+            {%- if 'ARRAY' in type_names.names -%}
                 {%- if value['items'] is mapping and value['items'] -%}
                     {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                     items:{
                     }
                 {%- endif -%}
             {%- endif -%}
+            {%- if value['nullable'] is defined and value['nullable'] %}
                 {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                 nullable:true
             {%- endif -%}
+            {%- if 'OBJECT' in type_names.names -%}
                 {%- if value['properties'] is defined and value['properties'] is mapping -%}
                     {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                     properties:{
                     {{- format_parameters(value, value['required'] | default([]), filter_keys=true) -}}
                     }
                 {%- endif -%}
+                {%- if value['required'] is defined and value['required'] -%}
                     {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
                     required:[
                     {%- for item in value['required'] | default([]) -%}
                     ]
                 {%- endif -%}
             {%- endif -%}
+            {%- if value['type'] is defined and value['type'] -%}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                {%- if value['type'] is string -%}
+                    type:<|"|>{{ value['type'] | upper }}<|"|>
+                {%- else -%}
+                    type:{{ format_argument(value['type'] | map('upper') | list) }}
+                {%- endif -%}
+            {%- endif -%}
+            }
         {%- endif -%}
     {%- endfor -%}
 {%- endmacro -%}
         {%- if params['properties'] -%}
             properties:{ {{- format_parameters(params['properties'], params['required']) -}} },
         {%- endif -%}
+        {%- if params['$defs'] is defined and params['$defs'] -%}
+            $defs:{{ format_argument(params['$defs'], escape_keys=false) }},
+        {%- endif -%}
         {%- if params['required'] -%}
             required:[
             {%- for item in params['required'] -%}
         {{- '<|"|>' + argument + '<|"|>' -}}
     {%- elif argument is boolean -%}
         {{- 'true' if argument else 'false' -}}
+    {%- elif argument is none -%}
+        {{- 'null' -}}
     {%- elif argument is mapping -%}
         {{- '{' -}}
         {%- set ns = namespace(found_first=false) -%}
             {{- '<|channel>thought\n<channel|>' -}}
         {%- endif -%}
     {%- endif -%}
+{%- endif -%}