Alibaba modelsimage generation api

alibaba/qwen-image-2/pro

Name: Qwen Image 2 Pro
Author: Alibaba

Alibaba Qwen Image 2 Pro text-to-image model with enhanced quality and configurable output format.

Input

Prompt(string)

The prompt to generate an image from.

Aspect Ratio(string)

The aspect ratio of the generated image. Allowed values: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, 9:21.

Seed(integer)

Random seed for reproducible results.

Output Format(string)

The format of the generated image. Allowed values: jpeg, png.

Idle

Example output — click Run to generate your own

Production endpoint

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDalibaba/qwen-image-2/pro

Input Schema

4 parameters · 1 required · 3 optional

Parameter	Type	Required	Description
`prompt`	string	Required	The prompt to generate an image from. · Min length: 1 · Max length: 10000 · Default: ""
`seed`	integer	Optional	Random seed for reproducible results.
`aspect_ratio`	string	Optional	The aspect ratio of the generated image. · Options: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, 9:21 · Default: "16:9" 21:916:94:31:13:49:169:21
`output_format`	string	Optional	The format of the generated image. · Options: jpeg, png · Default: "png" jpegpng

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "alibaba/qwen-image-2/pro",
  "prompt": "a beautiful sunset over mountains",
  "aspect_ratio": "16:9",
  "output_format": "png"
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

← Back to Qwen Image 2 Pro

API README

Qwen Image 2 Pro

Qwen Image 2 Pro is the Image 2 route for prompt-led image creation. It uses Qwen’s combined visual-semantic and appearance modeling to interpret subjects, relationships, typography, spatial structure, and surface detail as a connected composition, giving this exact route a clearer production purpose than a generic image request.

Use Qwen Image 2 Pro when the project specifically requires a new visual built from a detailed brief. State the creative goal, then define composition, viewpoint, wording, materials, lighting, and finish; for edits, explicitly separate the intended transformation from identity, layout, or regions that must remain stable.

Highlights

Image 2 Dense information composition. Organizes multiple concepts, subjects, and written elements into clear hierarchy.
Image 2 High-precision typography. Renders compact Chinese and English text inside visual layouts.
Image 2 Professional photographic detail. Produces controlled materials, lighting, texture, and camera-like finish.
Image 2 Pro unified quality. Exposes the Pro model’s complex prompt alignment and polished rendering for general image creation.

Pricing

Configuration	Billing unit	Price
Base generation	Per request	$0.07

When to Use

✅ Good fit	❌ Consider alternatives
The project needs a new image must be created from a written brief	The intended task belongs to a different media workflow
The available inputs match every required local field	Required source material or usage permission is unavailable
Creative direction can identify subject, style, and delivery	The output must be deterministic at pixel or waveform level
The supported route controls fit the final placement	Delivery requires unsupported formats or dimensions
An asynchronous generated result fits production	A live or frame-synchronous response is mandatory

Prompt Guide

Write the request as a production brief. Identify the subject or source, state the intended result, describe composition and visual or vocal character, then list exact preservation and delivery constraints. For edits, explicitly separate what must change from what must remain unchanged.

{
  "prompt": "",
  "seed": 1,
  "aspect_ratio": "21:9",
  "output_format": "jpeg"
}

Technical Specs

Spec	Value
Model ID	`alibaba/qwen-image-2/pro`
Input fields	`seed` (integer)<br>`prompt` (string)<br>`aspect_ratio` (string; `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `9:21`)<br>`output_format` (string; `jpeg`, `png`)
Required input	`prompt`
Output fields	`url`, `content_type`
Execution	Asynchronous job

Related Models

alibaba/qwen-image-2
alibaba/qwen-image-2/edit
alibaba/qwen-image-2/pro/edit