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fal-ai/ flux/schnell

text-to-imageFLUX.1 [schnell] is a 12 billion parameter flow transformer that generates high-quality images from text in 1 to 4 steps, suitable for personal and commercial use.optimized
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fal-ai/ flux/dev

text-to-imageFLUX.1 [dev] is a 12 billion parameter flow transformer that generates high-quality images from text. It is suitable for personal and commercial use.flux
Here is a quick guide on how to use this model from an API in less than 1 minute. Before we proceed, you need to create an API key. This key secret will be used to authenticate your requests to the fal API. 
fal.config({
  credentials: "PASTE_YOUR_FAL_KEY_HERE",
});
Now you can call our Model API endpoint using the fal js client: 
import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/flux/dev", {
  input: {
    prompt:
      "photo of a rhino dressed suit and tie sitting at a table in a bar with a bar stools, award winning photography, Elke vogelsang",
  },
});
Note:

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Image Uploads Should Not Waste GPU Cycles

We upload the output image in a background thread so we don’t charge any GPU time for time spent on the GPU that is not directly inference.