Cosmos 3

Reason about physical scenes with NVIDIA Cosmos 3.

This workflow block runs the NVIDIA Cosmos 3 reasoner - a world model tuned for physical scene understanding - on an image with an optional text prompt, and returns a text answer. The model is well suited to questions about spatial relations, safety, and what will happen next in a scene.

Type identifier

Use the following identifier in step "type" field: roboflow_core/cosmos3_edge@v1 to add the block as a step in your workflow.

Properties

Name	Type	Description	Refs
name	str	Enter a unique identifier for this step..	❌
prompt	str	Optional text prompt to pass to Cosmos 3 Edge. Otherwise a default scene-description prompt is used, which may affect the desired model behavior..	✅
model_version	str	The Cosmos 3 Edge model to be used for inference..	✅
system_prompt	str	Optional system prompt to provide additional context to Cosmos 3 Edge..	✅

The Refs column marks possibility to parametrise the property with dynamic values available in workflow runtime. See Bindings for more info.

Runtime compatibility

hard - runtime self_hosted_cpu; execution local : Requires a GPU; run_locally() loads a model that needs CUDA.

Input and Output Bindings

The available connections depend on its binding kinds. Check what binding kinds Cosmos 3 in version v1 has.

Input and output bindings

• input

  • images (image): The image to infer on..

  • prompt (string): Optional text prompt to pass to Cosmos 3 Edge. Otherwise a default scene-description prompt is used, which may affect the desired model behavior..

  • model_version (roboflow_model_id): The Cosmos 3 Edge model to be used for inference..

  • system_prompt (string): Optional system prompt to provide additional context to Cosmos 3 Edge..

• output

  • output (Union[string, language_model_output]): String value if string or LLM / VLM output if language_model_output.

Example JSON definition

{
	    "name": "<your_step_name_here>",
	    "type": "roboflow_core/cosmos3_edge@v1",
	    "images": "$inputs.image",
	    "prompt": "Is the walkway free of obstacles?",
	    "model_version": "nvidia/cosmos-3-edge",
	    "system_prompt": "You are a safety inspector."
	}