Qwen Image 3.0 Pro API

Complete API reference for the Qwen Image 3.0 Standard and Pro models powered by Alibaba Qwen.

Model Variants

This API supports four model variants:

Quick Comparison

Supported Aspect Ratios

All four models support these aspect ratios:

16:9, 9:16, 1:1, 4:3, 3:4, 3:2, 2:3

Endpoint

POST /api/v1/image/task

Authentication

Authorization: Bearer YOUR_API_KEY

Text-to-Image Generation

Use qwen-image-3.0 for the Standard model or qwen-image-3.0-pro for the Pro model.

Request Parameters

Required

The width-to-height ratio must be one of: 16:9, 9:16, 1:1, 4:3, 3:4, 3:2, 2:3.

Optional

Standard Example Request

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const response = await fetch('https://api.flaq.ai/api/v1/image/task', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model_name: 'qwen-image-3.0',
    prompt: 'A professional product photo with soft studio lighting',
    width: 16,
    height: 9,
    resolution: '1k',
    seed: 42
  })
});

const { data } = await response.json();
const taskId = data.task_id;

Pro Example Request

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const response = await fetch('https://api.flaq.ai/api/v1/image/task', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model_name: 'qwen-image-3.0-pro',
    prompt: 'A detailed editorial product scene with precise typography and cinematic lighting',
    width: 16,
    height: 9,
    resolution: '2k',
    seed: 42
  })
});

const { data } = await response.json();
const taskId = data.task_id;

Image Editing

Use qwen-image-3.0-edit for the Standard Edit model or qwen-image-3.0-pro-edit for the Pro Edit model.

Request Parameters

Required

The width-to-height ratio must be one of: 16:9, 9:16, 1:1, 4:3, 3:4, 3:2, 2:3.

Optional

Standard Edit Example Request

javascriptCopy
const response = await fetch('https://api.flaq.ai/api/v1/image/task', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model_name: 'qwen-image-3.0-edit',
    prompt: 'Transform the input into a polished editorial portrait with soft studio lighting',
    width: 16,
    height: 9,
    resolution: '1k',
    image_url_list: ['https://example.com/image1.jpg'],
    seed: 42
  })
});

const { data } = await response.json();
const taskId = data.task_id;

Pro Edit Multi-Image Example Request

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const response = await fetch('https://api.flaq.ai/api/v1/image/task', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model_name: 'qwen-image-3.0-pro-edit',
    prompt: 'Combine the products from these references into one cohesive campaign image',
    width: 16,
    height: 9,
    resolution: '2k',
    image_url_list: [
      'https://example.com/image1.jpg',
      'https://example.com/image2.jpg',
      'https://example.com/image3.jpg'
    ],
    seed: 42
  })
});

const { data } = await response.json();
const taskId = data.task_id;

Response Format

Initial Response

All models return a task_id for polling:

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{
  "code": 0,
  "data": {
    "task_id": "{task_id}",
    "task_status": "submitted",
    "response_url": "https://api.flaq.ai/api/v1/image/{task_id}"
  },
  "message": "success"
}

Polling Response

Poll GET /api/v1/image/{task_id} to check the task status:

jsonCopy
{
  "code": 0,
  "data": {
    "task_id": "{task_id}",
    "task_status": "succeed",
    "task_status_msg": null,
    "response_url": "https://api.flaq.ai/api/v1/image/{task_id}",
    "task_result": {
      "credit": 0.0997,
      "images": [
        {
          "url": "https://example.com/generated-image.jpeg"
        }
      ]
    }
  },
  "message": "success"
}

Status Values

• submitted: Task accepted
• processing: Generation in progress
• succeed: Generation completed successfully
• failed: Generation failed

Best Practices

Text-to-Image Tips

1. Be Specific: Include the subject, style, lighting, composition, and text requirements in the prompt.
2. Choose the Resolution: Select 1k or 2k based on the required output resolution.
3. Select the Aspect Ratio: Match the ratio to the destination, such as 16:9 for banners or 9:16 for vertical content.
4. Use Seed for Reproducibility: Set a fixed seed when you need repeatable generation settings.

Image Editing Tips

1. Use Clear Instructions: Describe what should change and what should remain consistent.
2. Order Multiple Inputs Deliberately: Provide 1–3 images and explain the role of each reference in the prompt.
3. Choose the Output Resolution: Select 1k or 2k independently from the input image dimensions.
4. Use High-Quality Inputs: Clear source images generally produce more controlled editing results.