FLUX.1 Fill [dev]
Black Forest Labs' open-weight inpainting and outpainting model, guidance-distilled from FLUX.1 Fill [pro]. You supply an image plus a mask and a prompt; it fills the masked region or extends the canvas with prompt-guided content that matches lighting and texture.
FLUX.1 Fill [dev] is image generation AI model from Black Forest Labs, priced at €0.000 per 1M input tokens with a unknown context window.
Pricing
API Integration
Use our OpenAI-compatible API to integrate FLUX.1 Fill [dev] into your application.
npm install railwailimport railwail from "railwail";
const rw = railwail("YOUR_API_KEY");
const images = await rw.run("flux-fill-dev", "A beautiful sunset over Tokyo");
console.log(images[0].url);
// Or use the image() method for full control
const res = await rw.image("flux-fill-dev", "A cat in space", {
size: "1024x1024",
n: 1,
});
console.log(res.data[0].url);Frequently asked questions
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Start using FLUX.1 Fill [dev] today
Get started with free credits. No credit card required. Access FLUX.1 Fill [dev] and 100+ other models through a single API.