Qwen Image 2.1 Pro

POST/v1/media/queue

from $0.10/image

Overview

Higher-quality image generation and editing via Qwen Image 2.1 Pro, the quality tier of the Qwen Image 2.1 series. Async operation — submit a job, poll for completion.

Property	Value
Model ID	`qwen/qwen-image-2.1-pro`
Alias	`qwen-image-2-1-pro`
Provider	Qwen
Category	Image Generation
Output Formats	png
Reference Images	Supported
Billing	Dynamic (actual cost per job)
Typical Cost	~$0.10 per image

Usage

All media models use the async job queue. Submit a job, then poll for the result.

Step 1: Submit Job

Text-to-Image

const res = await fetch('https://api.yepapi.com/v1/media/queue', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    model: 'qwen/qwen-image-2.1-pro',
    prompt: 'A ceramicist\'s studio at golden hour with shelves of unglazed bowls',
  }),
});
const { data } = await res.json();
// data.jobId — use this to poll for results

curl -X POST https://api.yepapi.com/v1/media/queue \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "qwen/qwen-image-2.1-pro", "prompt": "A ceramicist'\''s studio at golden hour with shelves of unglazed bowls"}'

Image-to-Image (Edit / Transform)

Pass a reference image via imageData alongside your prompt to edit or transform an existing image.

const res = await fetch('https://api.yepapi.com/v1/media/queue', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    model: 'qwen/qwen-image-2.1-pro',
    prompt: 'Make the sky purple and add northern lights',
    imageData: {
      mimeType: 'image/png',
      base64: '...', // Base64-encoded image
    },
  }),
});

Step 2: Poll for Result

const status = await fetch(`https://api.yepapi.com/v1/media/status/${data.jobId}`, {
  headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status — "pending" | "processing" | "completed" | "failed"
// job.result.image — { mimeType, base64 } when completed

curl https://api.yepapi.com/v1/media/status/JOB_ID \
  -H "x-api-key: YOUR_API_KEY"

Request Body

Parameter	Type	Required	Description	Default
`model`	`string`	Yes	`qwen/qwen-image-2.1-pro` or alias `qwen-image-2-1-pro`	—
`prompt`	`string`	Yes	Text description of the image to generate or edit	—
`options.outputFormat`	`string`	No	`png`	`png`
`imageData.mimeType`	`string`	No	MIME type of input image (image/png, image/jpeg, image/webp)	—
`imageData.base64`	`string`	No	Base64-encoded input image for image-to-image editing	—

Features

Higher-quality tier of the Qwen Image 2.1 series
Text-to-image generation
Reference-image editing via imageData
PNG output

Pricing

Billing is dynamic — each job is billed from the actual cost of that generation.

Metric	Cost
Typical cost per image	~$0.10

Info

Image jobs typically complete in 5–60 seconds. Results retained for 1 hour.

Under the Hood

Qwen Image 2.1 Pro

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