---
description: "FLUX.1 [schnell] is a 12 billion parameter rectified flow transformer capable of generating images from text descriptions. "
title: flux-1-schnell
image: https://developers.cloudflare.com/og-docs.png
---

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# flux-1-schnell

Text-to-Image • Black Forest Labs

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/ai/models/%40cf/black-forest-labs/flux-1-schnell/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

`@cf/black-forest-labs/flux-1-schnell`

- Cloudflare-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 ↗](https://bfl.ai/legal/terms-of-service) |

## Usage

```ts
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>;
```

```ts
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>;
```

```sh
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

prompt

`string`requiredminLength: 1maxLength: 2048A text description of the image you want to generate.

steps

`integer`maximum: 8The number of diffusion steps; higher values can improve quality but take longer. Default is 4

image

`string`The generated image in Base64 format.

## API Schemas (Raw)

Input [Open](https://developers.cloudflare.com/ai/models/@cf/black-forest-labs/flux-1-schnell/schema-input.json) [Download](https://developers.cloudflare.com/ai/models/@cf/black-forest-labs/flux-1-schnell/schema-input.json)

Output [Open](https://developers.cloudflare.com/ai/models/@cf/black-forest-labs/flux-1-schnell/schema-output.json) [Download](https://developers.cloudflare.com/ai/models/@cf/black-forest-labs/flux-1-schnell/schema-output.json)

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