Image

HiDream I1 Fast

Credit-based pricing. Supports batch up to 4.

Try HiDream I1 Fast →Compare models

Output

image

Aspect ratio

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

Resolution

1024, 2048

Max batch

Inputs

Batch up to 4 per request

Example prompt

A lone wolf standing on a cliff edge howling at a massive full moon, bioluminescent forest glowing teal and purple below, northern lights rippling across a star-filled sky, ultra detailed fur, breathtaking natural scenery, cinematic wide-angle composition, ethereal lighting, 8K resolution

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/hidream-i1-fast.

POST/api/v1/generate15 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.
`num_inference_steps`	number	Optional	Number of inference steps. Fast model runs well at 16. · Default: 16 · Range: 1–50
`negative_prompt`	string	Optional	Elements to exclude from the image — colors, objects, styles, or qualities to avoid. · Default:
`enable_safety_checker`	boolean	Optional	Filter potentially unsafe content from the output. · Default: true
`output_format`	string	Optional	The format of the generated image. · Allowed: jpeg, png · Default: jpeg
`seed`	integer	Optional	The same seed and the same prompt will output the same image every time.
`aspect_ratio`	string	Optional	Allowed: 1:1, 16:9, 9:16, 4:3, 3:4, Custom
`resolution`	string	Optional	Allowed: 1024, 2048
`num_images`	integer	Optional	Range: 1–4

Minimal request example

{
  "model_id": "fal-ai/hidream-i1-fast",
  "prompt": "A lone wolf standing on a cliff edge howling at a massive full moon, bioluminescent forest glowing teal and purple below, northern lights rippling across a star-filled sky, ultra detailed fur, breathtaking natural scenery, cinematic wide-angle composition, ethereal lighting, 8K resolution"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=fal-ai%2Fhidream-i1-fast",
  "title": "HiDream I1 Fast generation request",
  "description": "Request body accepted by POST /api/v1/generate for fal-ai/hidream-i1-fast.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "fal-ai/hidream-i1-fast",
      "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"
    },
    "num_inference_steps": {
      "title": "Steps",
      "description": "Number of inference steps. Fast model runs well at 16.",
      "default": 16,
      "type": "number",
      "minimum": 1,
      "maximum": 50,
      "multipleOf": 1
    },
    "negative_prompt": {
      "title": "Negative Prompt",
      "description": "Elements to exclude from the image — colors, objects, styles, or qualities to avoid.",
      "default": "",
      "type": "string"
    },
    "enable_safety_checker": {
      "title": "Safety Checker",
      "description": "Filter potentially unsafe content from the output.",
      "default": true,
      "type": "boolean"
    },
    "output_format": {
      "title": "Output Format",
      "description": "The format of the generated image.",
      "default": "jpeg",
      "type": "string",
      "enum": [
        "jpeg",
        "png"
      ]
    },
    "seed": {
      "title": "Seed",
      "description": "The same seed and the same prompt will output the same image every time.",
      "type": "integer"
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "1:1",
        "16:9",
        "9:16",
        "4:3",
        "3:4",
        "Custom"
      ]
    },
    "resolution": {
      "type": "string",
      "enum": [
        "1024",
        "2048"
      ]
    },
    "num_images": {
      "type": "integer",
      "minimum": 1,
      "maximum": 4
    }
  },
  "required": [
    "model_id",
    "prompt"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does HiDream I1 Fast 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 HiDream I1 Fast fails?

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

Can I call HiDream I1 Fast from the API?

Yes. Use POST /api/v1/generate with model_id: "fal-ai/hidream-i1-fast". 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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