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A fast, low-cost 1-4 step model for drafts, batch generation, and rapid prompt exploration.

Provider: Black Forest Labs

Category: image generation

Endpoint: /v1/tasks

Status: Available

Cost: See live page pricing

Back to Models

FLUX.1 [schnell]

Budget
by Black Forest LabsImage

A fast, low-cost 1-4 step model for drafts, batch generation, and rapid prompt exploration.

Pricing

Standard Usage

10 Credits/ image

Input

0 / 5000

More parameters

Generation settings

Choose the output image file format

How closely to follow the prompt; higher means closer; Range: 1 - 20

Inference steps used for generation; Range: 1 - 12, Integer only

Generation preferences

Enable content safety filtering

Advanced

For repeatable results · integer 0-2147483647
Estimated cost10 Credits / imageper image

Output

Ready for generation

Configure your parameters and click "Run" to see the output here.

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About FLUX.1 [schnell]

A fast, low-cost 1-4 step model for drafts, batch generation, and rapid prompt exploration.

The Playground and API use the same model ID: flux-schnell/text-to-image. This endpoint accepts text prompts only; reference-image editing uses the separate Image-to-Image route.

Provider
Black Forest Labs
Task
Text-to-Image
References
Not supported
Pricing
10 Credits / image

Model specifications

Explore reference limits, sizes, formats and quality settings for FLUX.1 [schnell].

Reference images
Not supported
Output resolution
1-12 inference steps
Aspect ratios
1:116:99:164:33:4
Output formats
PNGJPEG
Prompt length
Up to 20,000 characters
Pricing
Per image: 10 Credits / image

Final cost depends on the output tier and input add-ons. Check the live page price and task record for the final charge.

How to use FLUX.1 [schnell]

Choose the destination and aspect ratio before composing subject, scene, material, light, and text.

Subject
Scene
Camera and light
01

Describe subject and scene

API Quickstart

Copy a minimal request below. See Docs for parameters, callbacks, task retrieval, and errors.

Endpoint
POST /v1/tasks
Model ID
flux-schnell/text-to-image
cURL
curl -X POST "https://api.hiapi.ai/v1/tasks" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "flux-schnell/text-to-image",
  "input": {
    "prompt": "A cinematic product campaign with sharp text",
    "aspect_ratio": "4:3",
    "num_inference_steps": 4,
    "guidance_scale": 3.5,
    "output_format": "jpeg"
  }
}'

The create request immediately returns a taskId; image generation continues asynchronously.

Read the full API documentation
Need to compare models and billing tiers?View live pricing for all models

Frequently asked questions

What is FLUX.1 [schnell] best for?

A fast, low-cost 1-4 step model for drafts, batch generation, and rapid prompt exploration.

Does FLUX.1 [schnell] accept reference images?

No. This route is text-to-image only.

Which output settings are supported?

The page exposes 1-12 inference steps and 1:1, 16:9, 9:16, 4:3, 3:4; use the Playground contract for the final available set.

How is FLUX.1 [schnell] billed?

Billing is per successful generated image. Resolution or quality differences, when present, are reflected by the live page price.

How do I call the FLUX.1 [schnell] API?

POST an asynchronous task to /v1/tasks with model set to flux-schnell/text-to-image and put generation fields inside input.

Start with the subject, environment, and visual goal, then add material, light, camera, and exact text.

Draft

1-12 inference steps

Final

1-12 inference steps

02

Choose output settings

Generate in 1-12 inference steps across 5 supported aspect ratios.

Playground
POST /v1/tasks
03

Validate before integration

Confirm the result in Playground, then reuse the same prompt and model ID in an asynchronous task.