Image

SD 3 Medium

Credit-based pricing. Supports batch up to 4.

Try SD 3 Medium →Compare models

Output

image

Aspect ratio

1:1, 16:9, 9:16, 4:3, 3:4, Custom

Resolution

512, 1024, 2048

Max batch

Inputs

Batch up to 4 per request

Example prompt

A father helping his daughter prepare breakfast in a small kitchen, morning sunlight through the window, genuine interaction, realistic home environment, documentary photography

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=fal-ai/stable-diffusion-v3-medium.

POST/api/v1/generate16 fields · 2 required

Field	Type	Requirement	Contract
`model_id`	constant	Required	ArtEmotion model identifier.
`extra`	object	Optional	Model-specific settings may also be nested here.
`max_credits`	number	Optional	Reject before submission if the estimated list price exceeds this cap. · Range: 1–…
`webhook_url`	string	Optional	Format: uri
`webhook_secret`	string	Optional	Optional model input.
`folder_id`	string	Optional	Optional model input.
`prompt`	string	Required	Optional model input.
`prompt_expansion`	boolean	Optional	If set to true, prompt will be upsampled with more details. · Default: false
`num_inference_steps`	number	Optional	The number of inference steps to perform. · Default: 28 · Range: 1–50
`seed`	integer	Optional	The same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time.
`guidance_scale`	number	Optional	The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show · Default: 5 · Range: 0–20
`negative_prompt`	string	Optional	The negative prompt to generate an image from. · Default:
`enable_safety_checker`	boolean	Optional	If set to true, the safety checker will be enabled. · Default: true
`aspect_ratio`	string	Optional	Allowed: 1:1, 16:9, 9:16, 4:3, 3:4, Custom
`resolution`	string	Optional	Allowed: 512, 1024, 2048
`num_images`	integer	Optional	Range: 1–4

Minimal request example

{
  "model_id": "fal-ai/stable-diffusion-v3-medium",
  "prompt": "A father helping his daughter prepare breakfast in a small kitchen, morning sunlight through the window, genuine interaction, realistic home environment, documentary photography"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=fal-ai%2Fstable-diffusion-v3-medium",
  "title": "SD 3 Medium generation request",
  "description": "Request body accepted by POST /api/v1/generate for fal-ai/stable-diffusion-v3-medium.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "fal-ai/stable-diffusion-v3-medium",
      "description": "ArtEmotion model identifier."
    },
    "extra": {
      "type": "object",
      "additionalProperties": true,
      "description": "Model-specific settings may also be nested here."
    },
    "max_credits": {
      "type": "number",
      "minimum": 1,
      "description": "Reject before submission if the estimated list price exceeds this cap."
    },
    "webhook_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048
    },
    "webhook_secret": {
      "type": "string",
      "maxLength": 512
    },
    "folder_id": {
      "type": "string"
    },
    "prompt": {
      "type": "string"
    },
    "prompt_expansion": {
      "title": "Prompt Expansion",
      "description": "If set to true, prompt will be upsampled with more details.",
      "default": false,
      "type": "boolean"
    },
    "num_inference_steps": {
      "title": "Num Inference Steps",
      "description": "The number of inference steps to perform.",
      "default": 28,
      "type": "number",
      "minimum": 1,
      "maximum": 50,
      "multipleOf": 1
    },
    "seed": {
      "title": "Seed",
      "description": "The same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time.",
      "type": "integer"
    },
    "guidance_scale": {
      "title": "Guidance Scale",
      "description": "The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show",
      "default": 5,
      "type": "number",
      "minimum": 0,
      "maximum": 20
    },
    "negative_prompt": {
      "title": "Negative Prompt",
      "description": "The negative prompt to generate an image from.",
      "default": "",
      "type": "string"
    },
    "enable_safety_checker": {
      "title": "Enable Safety Checker",
      "description": "If set to true, the safety checker will be enabled.",
      "default": true,
      "type": "boolean"
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "1:1",
        "16:9",
        "9:16",
        "4:3",
        "3:4",
        "Custom"
      ]
    },
    "resolution": {
      "type": "string",
      "enum": [
        "512",
        "1024",
        "2048"
      ]
    },
    "num_images": {
      "type": "integer",
      "minimum": 1,
      "maximum": 4
    }
  },
  "required": [
    "model_id",
    "prompt"
  ],
  "additionalProperties": false
}

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FAQ

How much does SD 3 Medium cost on ArtEmotion?

Credit-based pricing. You pay in ArtEmotion credits — every plan and top-up converts USD to credits at a fixed rate.

Do I get my credits back if SD 3 Medium fails?

Yes — failed generations are never charged. The credits are released back to your balance automatically.

Can I call SD 3 Medium from the API?

Yes. Use POST /api/v1/generate with model_id: "fal-ai/stable-diffusion-v3-medium". See the API reference for the full schema.

Where are my generations stored?

Every output is saved to your personal Library. You can export or delete everything any time from Privacy & deletion.

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