Image-Text-to-Text
Transformers
Safetensors
PyTorch
nemotron_labs_diffusion_vlm
feature-extraction
nvidia
multimodal
vlm
diffusion-language-model
conversational
custom_code
Instructions to use nvidia/Nemotron-Labs-Diffusion-VLM-8B with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Libraries
- Transformers
How to use nvidia/Nemotron-Labs-Diffusion-VLM-8B with Transformers:
# Use a pipeline as a high-level helper from transformers import pipeline pipe = pipeline("image-text-to-text", model="nvidia/Nemotron-Labs-Diffusion-VLM-8B", trust_remote_code=True) 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 AutoModel model = AutoModel.from_pretrained("nvidia/Nemotron-Labs-Diffusion-VLM-8B", trust_remote_code=True, dtype="auto") - Notebooks
- Google Colab
- Kaggle
- Local Apps
- vLLM
How to use nvidia/Nemotron-Labs-Diffusion-VLM-8B with vLLM:
Install from pip and serve model
# Install vLLM from pip: pip install vllm # Start the vLLM server: vllm serve "nvidia/Nemotron-Labs-Diffusion-VLM-8B" # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:8000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "nvidia/Nemotron-Labs-Diffusion-VLM-8B", "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/nvidia/Nemotron-Labs-Diffusion-VLM-8B
- SGLang
How to use nvidia/Nemotron-Labs-Diffusion-VLM-8B 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 "nvidia/Nemotron-Labs-Diffusion-VLM-8B" \ --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": "nvidia/Nemotron-Labs-Diffusion-VLM-8B", "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 "nvidia/Nemotron-Labs-Diffusion-VLM-8B" \ --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": "nvidia/Nemotron-Labs-Diffusion-VLM-8B", "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 nvidia/Nemotron-Labs-Diffusion-VLM-8B with Docker Model Runner:
docker model run hf.co/nvidia/Nemotron-Labs-Diffusion-VLM-8B
File size: 11,505 Bytes
c6706ba | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 | {% macro render_extra_keys(json_dict, handled_keys) %}
{%- if json_dict is mapping %}
{%- for json_key in json_dict if json_key not in handled_keys %}
{%- if json_dict[json_key] is mapping or (json_dict[json_key] is sequence and json_dict[json_key] is not string) %}
{{- '\n<' ~ json_key ~ '>' ~ (json_dict[json_key] | tojson | safe) ~ '</' ~ json_key ~ '>' }}
{%- else %}
{{-'\n<' ~ json_key ~ '>' ~ (json_dict[json_key] | string) ~ '</' ~ json_key ~ '>' }}
{%- endif %}
{%- endfor %}
{%- endif %}
{% endmacro %}
{%- set enable_thinking = enable_thinking if enable_thinking is defined else True %}
{%- set truncate_history_thinking = truncate_history_thinking if truncate_history_thinking is defined else True %}
{%- set ns = namespace(last_user_idx = -1) %}
{%- set loop_messages = messages %}
{%- for m in loop_messages %}
{%- if m["role"] == "user" %}
{%- set ns.last_user_idx = loop.index0 %}
{%- endif %}
{%- endfor %}
{%- if messages[0]["role"] == "system" %}
{%- set system_message = messages[0]["content"] %}
{%- set loop_messages = messages[1:] %}
{%- else %}
{%- set system_message = "" %}
{%- set loop_messages = messages %}
{%- endif %}
{%- if not tools is defined %}
{%- set tools = [] %}
{%- endif %}
{# Recompute last_user_idx relative to loop_messages after handling system #}
{%- set ns = namespace(last_user_idx = -1) %}
{%- for m in loop_messages %}
{%- if m["role"] == "user" %}
{%- set ns.last_user_idx = loop.index0 %}
{%- endif %}
{%- endfor %}
{%- if system_message is defined %}
{{- "<|im_start|>system\n" + system_message }}
{%- else %}
{%- if tools is iterable and tools | length > 0 %}
{{- "<|im_start|>system\n" }}
{%- endif %}
{%- endif %}
{%- if tools is iterable and tools | length > 0 %}
{%- if system_message is defined and system_message | length > 0 %}
{{- "\n\n" }}
{%- endif %}
{{- "# Tools\n\nYou have access to the following functions:\n\n" }}
{{- "<tools>" }}
{%- for tool in tools %}
{%- if tool.function is defined %}
{%- set tool = tool.function %}
{%- endif %}
{{- "\n<function>\n<name>" ~ tool.name ~ "</name>" }}
{%- if tool.description is defined %}
{{- '\n<description>' ~ (tool.description | trim) ~ '</description>' }}
{%- endif %}
{{- '\n<parameters>' }}
{%- if tool.parameters is defined and tool.parameters is mapping and tool.parameters.properties is defined and tool.parameters.properties is mapping %}
{%- for param_name, param_fields in tool.parameters.properties|items %}
{{- '\n<parameter>' }}
{{- '\n<name>' ~ param_name ~ '</name>' }}
{%- if param_fields.type is defined %}
{{- '\n<type>' ~ (param_fields.type | string) ~ '</type>' }}
{%- endif %}
{%- if param_fields.description is defined %}
{{- '\n<description>' ~ (param_fields.description | trim) ~ '</description>' }}
{%- endif %}
{%- if param_fields.enum is defined %}
{{- '\n<enum>' ~ (param_fields.enum | tojson | safe) ~ '</enum>' }}
{%- endif %}
{%- set handled_keys = ['name', 'type', 'description', 'enum'] %}
{{- render_extra_keys(param_fields, handled_keys) }}
{{- '\n</parameter>' }}
{%- endfor %}
{%- endif %}
{% set handled_keys = ['type', 'properties', 'required'] %}
{{- render_extra_keys(tool.parameters, handled_keys) }}
{%- if tool.parameters is defined and tool.parameters.required is defined %}
{{- '\n<required>' ~ (tool.parameters.required | tojson | safe) ~ '</required>' }}
{%- endif %}
{{- '\n</parameters>' }}
{%- set handled_keys = ['type', 'name', 'description', 'parameters'] %}
{{- render_extra_keys(tool, handled_keys) }}
{{- '\n</function>' }}
{%- endfor %}
{{- "\n</tools>" }}
{{- '\n\nIf you choose to call a function ONLY reply in the following format with NO suffix:\n\n<tool_call>\n<function=example_function_name>\n<parameter=example_parameter_1>\nvalue_1\n</parameter>\n<parameter=example_parameter_2>\nThis is the value for the second parameter\nthat can span\nmultiple lines\n</parameter>\n</function>\n</tool_call>\n\n<IMPORTANT>\nReminder:\n- Function calls MUST follow the specified format: an inner <function=...></function> block must be nested within <tool_call></tool_call> XML tags\n- Required parameters MUST be specified\n- You may provide optional reasoning for your function call in natural language BEFORE the function call, but NOT after\n- If there is no function call available, answer the question like normal with your current knowledge and do not tell the user about function calls\n</IMPORTANT>' }}
{%- endif %}
{%- if system_message is defined %}
{{- '<|im_end|>\n' }}
{%- else %}
{%- if tools is iterable and tools | length > 0 %}
{{- '<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- for message in loop_messages %}
{%- if message.role == "assistant" %}
{# Add reasoning content in to content field for unified processing below. #}
{%- if message.reasoning_content is defined and message.reasoning_content is string and message.reasoning_content | trim | length > 0 %}
{%- set msg_content = message.content | default('', true) %}
{%- if msg_content is not string -%}
{%- set ns_rc = namespace(text='') -%}
{%- for block in msg_content -%}
{%- if block.type is defined and block.type == "text" -%}
{%- set ns_rc.text = ns_rc.text + block.text -%}
{%- endif -%}
{%- endfor -%}
{%- set msg_content = ns_rc.text -%}
{%- endif -%}
{%- set content = "<think>\n" ~ message.reasoning_content ~ "\n</think>\n" ~ msg_content %}
{%- else %}
{%- set content = message.content | default('', true) %}
{%- if content is not string -%}
{%- set ns_c = namespace(text='') -%}
{%- for block in content -%}
{%- if block.type is defined and block.type == "text" -%}
{%- set ns_c.text = ns_c.text + block.text -%}
{%- endif -%}
{%- endfor -%}
{%- set content = ns_c.text -%}
{%- endif -%}
{%- if '<think>' not in content and '</think>' not in content -%}
{%- set content = "<think></think>" ~ content -%}
{%- endif -%}
{%- endif %}
{%- if message.tool_calls is defined and message.tool_calls is iterable and message.tool_calls | length > 0 %}
{# Assistant message has tool calls. #}
{{- '<|im_start|>assistant\n' }}
{%- set include_content = not (truncate_history_thinking and loop.index0 < ns.last_user_idx) %}
{%- if content is string and content | trim | length > 0 %}
{%- if include_content %}
{{- (content | trim) ~ '\n' -}}
{%- else %}
{%- set c = (content | string) %}
{%- if '</think>' in c %}
{# Keep only content after the last closing think. Also generation prompt causes this. #}
{%- set c = c.split('</think>')[-1] %}
{%- elif '<think>' in c %}
{# If <think> was opened but never closed, drop the trailing think segment #}
{%- set c = c.split('<think>')[0] %}
{%- endif %}
{%- set c = "<think></think>" ~ c | trim %}
{%- if c | length > 0 %}
{{- c ~ '\n' -}}
{%- endif %}
{%- endif %}
{%- else %}
{{- "<think></think>" -}}
{%- endif %}
{%- for tool_call in message.tool_calls %}
{%- if tool_call.function is defined %}
{%- set tool_call = tool_call.function %}
{%- endif %}
{{- '<tool_call>\n<function=' ~ tool_call.name ~ '>\n' -}}
{%- if tool_call.arguments is defined %}
{%- for args_name, args_value in tool_call.arguments|items %}
{{- '<parameter=' ~ args_name ~ '>\n' -}}
{%- set args_value = args_value | tojson | safe if args_value is mapping or (args_value is sequence and args_value is not string) else args_value | string %}
{{- args_value ~ '\n</parameter>\n' -}}
{%- endfor %}
{%- endif %}
{{- '</function>\n</tool_call>\n' -}}
{%- endfor %}
{{- '<|im_end|>\n' }}
{%- else %}
{# Assistant message doesn't have tool calls. #}
{%- if not (truncate_history_thinking and loop.index0 < ns.last_user_idx) %}
{{- '<|im_start|>assistant\n' ~ (content | default('', true) | string | trim) ~ '<|im_end|>\n' }}
{%- else %}
{%- set c = (content | default('', true) | string) %}
{%- if '<think>' in c and '</think>' in c %}
{%- set c = "<think></think>" ~ c.split('</think>')[-1] %}
{%- endif %}
{%- set c = c | trim %}
{%- if c | length > 0 %}
{{- '<|im_start|>assistant\n' ~ c ~ '<|im_end|>\n' }}
{%- else %}
{{- '<|im_start|>assistant\n<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- endif %}
{%- elif message.role == "user" or message.role == "system" %}
{{- '<|im_start|>' + message.role + '\n' }}
{%- if message.content is string %}
{{- message.content }}
{%- else %}
{%- for block in message.content %}
{%- if block.type == "text" %}
{{- block.text }}
{%- elif block.type in ["image", "image_url"] %}
{{- '<|image_start|>' }}
{%- endif %}
{%- endfor %}
{%- endif %}
{{- '<|im_end|>\n' }}
{%- elif message.role == "tool" %}
{%- if loop.previtem and loop.previtem.role != "tool" %}
{{- '<|im_start|>user\n' }}
{%- endif %}
{{- '<tool_response>\n' }}
{{- message.content }}
{{- '\n</tool_response>\n' }}
{%- if not loop.last and loop.nextitem.role != "tool" %}
{{- '<|im_end|>\n' }}
{%- elif loop.last %}
{{- '<|im_end|>\n' }}
{%- endif %}
{%- else %}
{{- '<|im_start|>' + message.role + '\n' + message.content + '<|im_end|>\n' }}
{%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
{%- if enable_thinking %}
{{- '<|im_start|>assistant\n<think>\n' }}
{%- else %}
{{- '<|im_start|>assistant\n<think></think>' }}
{%- endif %}
{%- endif %}
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