hidream-ai/hidream-i1/fast

Name: HiDream I1 Fast
Author: HiDream

Hidream I1 Fast is hidream-ai's advanced text-to-image AI model. Create photorealistic images, illustrations, and concept art from natural language descriptions with exceptional detail and prompt adherence.

Input

Prompt(string)

The prompt to generate an image from.

Aspect Ratio(string)

The aspect ratio of the generated image. Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16.

Seed(integer)

Random seed for reproducible generation.

Output Format(string)

The format of the generated image. Allowed values: jpeg, png.

Idle

Example output — click Run to generate your own

Production endpoint

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDhidream-ai/hidream-i1/fast

Input Schema

4 parameters · 1 required · 3 optional

Parameter	Type	Required	Description
`prompt`	string	Required	The prompt to generate an image from.
`seed`	integer	Optional	Random seed for reproducible generation.
`aspect_ratio`	string	Optional	The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 · Default: "16:9" 21:916:93:24:35:41:14:53:42:39:16
`output_format`	string	Optional	The format of the generated image. · Options: jpeg, png · Default: "jpeg" jpegpng

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "hidream-ai/hidream-i1/fast",
  "prompt": "a cat holding a skateboard which has 'fal' written on it in red spray paint",
  "aspect_ratio": "16:9",
  "output_format": "jpeg"
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

← Back to HiDream I1 Fast

API README

HiDream I1 Fast

hidream-ai/hidream-i1/fast creates high-quality still imagery from detailed written art direction, resolving subject, composition, lighting, materials, and style. HiDream-I1 Fast compresses the generation process for rapid image exploration while retaining the family's broad prompt understanding and visual range. This combination makes the model a practical choice when the creative outcome depends on those qualities rather than on a generic media conversion.

For production work with hidream-ai/hidream-i1/fast, the Fast tier is best for concept comparison, creative variants, and high-throughput drafts where turnaround matters more than the last increment of fine detail. The result is most reliable when the source material and creative brief clearly describe the intended subject, progression, visual or sonic character, and the qualities that must remain unchanged.

Highlights

Detailed text-to-image synthesis resolves complex scenes, materials, lighting, and visual relationships.

Strong prompt adherence follows subjects, attributes, spatial composition, and stylistic direction.

Style versatility spans photorealism, illustration, graphic design, and conceptual artwork.

Fast generation accelerates prompt iteration and high-volume visual exploration.

Pricing

Billing unit	Price
Per request	$0.01

When to Use

✅ Good fit	❌ Consider alternatives
The model's named workflow matches the source material and intended output	A different input modality or model route is required
A managed asynchronous result is suitable for the production pipeline	A synchronous, interactive editor is essential
The documented controls cover the required duration, framing, or format	The project needs controls outside this endpoint's schema
Creative iteration benefits from a repeatable request structure	Exact deterministic pixels, frames, geometry, or samples are mandatory
A finished downloadable media asset is the desired deliverable	Editable source layers or a native project file are required

Prompt Guide

For generation, state the intended result first, then add the subject or source treatment, progression, style, and delivery constraints. Keep one creative variable per phrase, use the documented field names for controls, and change one setting at a time when comparing results.

{
  "aspect_ratio": "16:9",
  "output_format": "jpeg",
  "prompt": "a cat holding a skateboard which has 'fal' written on it in red spray paint"
}

Technical Specs

Spec	Value
Model ID	`hidream-ai/hidream-i1/fast`
Inputs	aspect_ratio, output_format, prompt, seed
Required inputs	prompt
Output fields	content_type, url
Execution	Async (submit, then poll for result)
Aspect Ratio	21:9 / 16:9 / 3:2 / 4:3 / 5:4 / 1:1 / 4:5 / 3:4 / 2:3 / 9:16
Output Format	jpeg / png