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
```

Update chat_template.jinja to address JSON Schema shapes that do not expose their meaning through a direct top-level type

#91

by sigjhl - opened 29 days ago

base: refs/heads/main

←

from: refs/pr/91

Discussion Files changed

+50

-11

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 -%}