Alibaba: Qwen Image 3.0 (Image to Image) API Reference

About

Generates images from a text prompt at resolutions up to 2048×2048, with automatic prompt rewriting and prompt-guided resolution selection, building on Qwen's strength in complex text rendering and precise prompt adherence

1. Calling the API

Setup your API Key

To begin using Infron, you first need to create an account and generate your API Key.

Once you have your API key, set it as an environment variable in your runtime environment. This allows your applications to securely access Infron’s API.

export INFRON_KEY="YOUR_API_KEY"

Submit a request

For long-running requests, you can poll for results.

curl https://media.onerouter.pro/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'EOF'
{
    "model": "qwen/qwen-image-3.0/image-to-image",
    "prompt": "Add text in a cinematic font in front of the image, saying `He is back in town` and `In theaters early August 1948`",
    "negative_prompt": "low resolution, error, worst quality, low quality, deformed",
    "image_urls": [
      "https://storage.googleapis.com/infron_gcs/quick-upload/2026/08/13/20260813-151958-198b1f71-1.jpg"
    ],
    "size": "2048*2048",
    "watermark": false,
    "enable_prompt_expansion": true,
    "n": 1,
    "seed": 214748364
}
EOF

Response with queue task id

The response will look like this:

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "20260813073842744614482ErJsCzN",
    "object": "image",
    "model": "qwen/qwen-image-3.0/image-to-image",
    "status": "created",
    "urls": {
      "query": "https://media.onerouter.pro/v1/images/tasks/20260813073842744614482ErJsCzN"
    },
    "created_at": "2026-08-13 07:38:42.13"
  }
}

Fetch request status

You can fetch the status of a request to check if it is completed or still in progress.

curl https://media.onerouter.pro/v1/images/tasks/{task_id} \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" 

# For example
curl https://media.onerouter.pro/v1/images/tasks/20260813073842744614482ErJsCzN \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response with queue task status query

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "20260813073842744614482ErJsCzN",
    "object": "image",
    "model": "qwen/qwen-image-3.0/image-to-image",
    "status": "in_progress",
    "fail_reason": "",
    "submit_time": 1786606722,
    "start_time": 1786606722,
    "finish_time": 0,
    "outputs": [],
    "created_at": "2026-08-13 07:38:42"
  }
}

Possible statuses:

created
in_progress
processing
completed
failed

created -> in_progress → processing → completed | failed

Poll every 1-2 seconds until status is "completed" or "failed"

Get the result (when status is "completed")

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "20260813073842744614482ErJsCzN",
    "object": "image",
    "model": "qwen/qwen-image-3.0/image-to-image",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1786606722,
    "start_time": 1786606722,
    "finish_time": 1786606789,
    "outputs": [
      "https://infron.ai/cdn/media/image/generated/official_alibaba_image_be645303646d4e00ab2dca1a32721a25.png"
    ],
    "usage": {
      "completion_tokens": 0,
      "image_count": 1,
      "image_quality": "",
      "prompt_tokens": 1,
      "resolution": "2048*2048",
      "total_tokens": 1,
      "web_search": false
    },
    "cost": {
      "total_cost": 0.033,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0.033,
        "video_cost": 0,
        "audio_cost": 0,
        "native_web_search_cost": 0,
        "plugin_web_search_cost": 0,
        "tools_cost": 0,
        "prompt_cache_read_cost": 0,
        "prompt_cache_write_cost": 0,
        "prompt_cache_write_5_min": 0,
        "prompt_cache_write_1_h": 0,
        "reasoning_cost": 0,
        "discount_rate": 1,
        "is_byok": false,
        "byok_cost": 0
      }
    },
    "created_at": "2026-08-13 07:38:42"
  }
}

2. Schema

Input

Parameter	Type	Required	Default	Range	Description
model	string	Yes	--	Explore all models	Model name.
prompt	string	Yes	--	--	Text prompt for generation; Positive text prompt.
negative_prompt	string	No	--	--	Negative text prompt for generation; Negative text prompt.
image_urls	array	No	--	[1,3]	Image URLs to use as a reference for the generation.
size	string	No	`1024*1024`	`512512`, `20482048`	The size of the generated image in pixels (width*height).
watermark	boolean	No	`false`	`true`, `false`	Whether to add watermark to the image.
enablepromptexpansion	boolean	No	`true`	`true`, `false`	Whether to enable prompt expansion.
n	integer	No	`1`	[1]	Number of videos to generate.
seed	integer	No	--	>=1	The random seed to use for the generation.

Example request

curl https://media.onerouter.pro/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'EOF'
{
    "model": "qwen/qwen-image-3.0/image-to-image",
    "prompt": "Add text in a cinematic font in front of the image, saying `He is back in town` and `In theaters early August 1948`",
    "negative_prompt": "low resolution, error, worst quality, low quality, deformed",
    "image_urls": [
      "https://storage.googleapis.com/infron_gcs/quick-upload/2026/08/13/20260813-151958-198b1f71-1.jpg"
    ],
    "size": "2048*2048",
    "watermark": false,
    "enable_prompt_expansion": true,
    "n": 1,
    "seed": 214748364
}
EOF

Output

Parameter	Type	Range	Description
code	integer	--	Status code of the request.
message	string	--	Status message of the request.
data	object	--	Data of the task.
data.task_id	string	--	ID of the task.
data.object	string	--	Object type of the task.
data.model	string	--	Model name of the task.
data.status	string	`created`, `in_progress`, `processing`, `completed`, `failed`	Status of the task.
data.fail_reason	string	--	Fail reason of the task.
data.submit_time	integer	--	Timestamp of the task submission.
data.start_time	integer	--	Timestamp of the task start.
data.finish_time	integer	--	Timestamp of the task finish.
data.outputs	array	--	Outputs of the task.
data.created_at	string	--	Timestamp of the task creation.

Example output

{
  "code": 200,
  "message": "success",
  "data": {
    "task_id": "20260813073842744614482ErJsCzN",
    "object": "image",
    "model": "qwen/qwen-image-3.0/image-to-image",
    "status": "completed",
    "fail_reason": "",
    "submit_time": 1786606722,
    "start_time": 1786606722,
    "finish_time": 1786606789,
    "outputs": [
      "https://infron.ai/cdn/media/image/generated/official_alibaba_image_be645303646d4e00ab2dca1a32721a25.png"
    ],
    "usage": {
      "completion_tokens": 0,
      "image_count": 1,
      "image_quality": "",
      "prompt_tokens": 1,
      "resolution": "2048*2048",
      "total_tokens": 1,
      "web_search": false
    },
    "cost": {
      "total_cost": 0.033,
      "cost_details": {
        "prompt_cost": 0,
        "completion_cost": 0,
        "image_cost": 0.033,
        "video_cost": 0,
        "audio_cost": 0,
        "native_web_search_cost": 0,
        "plugin_web_search_cost": 0,
        "tools_cost": 0,
        "prompt_cache_read_cost": 0,
        "prompt_cache_write_cost": 0,
        "prompt_cache_write_5_min": 0,
        "prompt_cache_write_1_h": 0,
        "reasoning_cost": 0,
        "discount_rate": 1,
        "is_byok": false,
        "byok_cost": 0
      }
    },
    "created_at": "2026-08-13 07:38:42"
  }
}

3. Detailed Pricing

Model	Resolution	Reference Image	Price / Output Image
Qwen Image 3.0	1K	No	$0.030
Qwen Image 3.0	1K	Yes, 1 ref	$0.033
Qwen Image 3.0	2K	No	$0.030
Qwen Image 3.0	2K	Yes, 1 ref	$0.033
Qwen Image 3.0 Pro	1K	No	$0.040
Qwen Image 3.0 Pro	1K	Yes, 1 ref	$0.043
Qwen Image 3.0 Pro	2K	No	$0.075
Qwen Image 3.0 Pro	2K	Yes, 1 ref	$0.078