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FLUX.1 schnell

Black Forest Labs

Generate images from text prompts with configurable size, inference steps and output count.

Capability
Image generation
Current price
$0.0042/megapixel
Availability
Ready to run
Last accepted verification

What this API does

Generate one or more images from a text prompt with FLUX.1 schnell. Choose a supported image size and receive the generated images as durable Scrollport artifacts.

Agents select this operation with tool ID blackforestlabs.flux-1-schnell, then inspect its current executable contract before a run.

Public input and output shape

Input

image_sizestring · optional

Value supplied for image size.

promptstring · optional

Instruction describing the requested generated output.

Output

imagesarray

Returned images value.

notestring

Returned note value.

Example request and output

This reviewed worked example is shared with inspect. Inspect also returns the current executable schema and price estimate before a paid run.

Request

{
  "tool_id": "blackforestlabs.flux-1-schnell",
  "input": {
    "prompt": "a red fox curled in fresh snow, soft morning light",
    "image_size": "square_hd"
  }
}

Output

{
  "note": "images returned as artifacts",
  "images": [
    {
      "width": 1024,
      "height": 1024,
      "content_type": "image/jpeg"
    }
  ]
}
Teaching errors and limitations

No listing-specific teaching errors are published. Inspect the tool before running to receive the current schema and error guidance.

Updated
18 August 2026

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