Qwen Image 2.1 Pro

import { writeFile } from "node:fs/promises";

const res = await fetch("https://openrouter.ai/api/v1/images", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.OPENROUTER_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "qwen/qwen-image-2.1-pro",
    "prompt": "A ceramic mug on a linen cloth, morning light, no text",
    "aspect_ratio": "1:1"
  }),
});
const result = await res.json();
// Images come back base64-encoded.
await writeFile("out.png", Buffer.from(result.data[0].b64_json, "base64"));