flux-1-schnell

Text-to-Image • Black Forest Labs • Hosted

FLUX.1 [schnell] is a 12 billion parameter rectified flow transformer capable of generating images from text descriptions.

Model Info
Terms and License	link ↗
Unit Pricing	$0.000053 per 512 by 512 tile, $0.00011 per step

Usage

export interface Env {
  AI: Ai;
}

export default {
  async fetch(request, env): Promise<Response> {
    const response = await env.AI.run('@cf/black-forest-labs/flux-1-schnell', {
      prompt: 'a cyberpunk lizard',
      seed: Math.floor(Math.random() * 10)
    });
    // response.image is base64 encoded which can be used directly as an <img src=""> data URI
    const dataURI = `data:image/jpeg;charset=utf-8;base64,${response.image}`;
    return Response.json({ dataURI });
  },
} satisfies ExportedHandler<Env>;

export interface Env {
  AI: Ai;
}

export default {
  async fetch(request, env): Promise<Response> {
    const response = await env.AI.run('@cf/black-forest-labs/flux-1-schnell', {
      prompt: 'a cyberpunk lizard',
      seed: Math.floor(Math.random() * 10)
    });
    // Convert from base64 string
    const binaryString = atob(response.image);
    // Create byte representation
    const img = Uint8Array.from(binaryString, (m) => m.codePointAt(0));
    return new Response(img, {
      headers: {
        'Content-Type': 'image/jpeg',
      },
    });
  },
} satisfies ExportedHandler<Env>;

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run/@cf/black-forest-labs/flux-1-schnell  \
  -X POST  \
  -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN"  \
  -d '{ "prompt": "cyberpunk cat", "seed": "Random positive integer" }'

Parameters

Input
Output

prompt

stringrequiredminLength: 1maxLength: 2048A text description of the image you want to generate.

steps

integerdefault: 4maximum: 8The number of diffusion steps; higher values can improve quality but take longer.

image

stringThe generated image in Base64 format.

API Schemas (Raw)

Input

Output