Wan 2.5 Image

Overview

Wan 2.5 Image is an Alibaba image model for text-to-image and image-to-image generation. Use this page when you are ready to call the API after trying the model in the APIXO playground.

Capability	Value
Model ID	`wan-2-5-image`
Modes	`text-to-image`, `image-to-image`
Prompt	Required, non-empty; supports Chinese/English; max `2000` characters (model-side truncation)
Negative prompt	Optional; supports Chinese/English; max `500` characters (model-side truncation)
Images per task	`num_images` supports `1-4`, default `4`
Reference images	`image-to-image` requires `1-3` image URLs
Input image limits (`image_urls`)	`JPEG/JPG/PNG(no alpha)/BMP/WEBP`, width/height `384-5000` px, file size `<=10MB`
Aspect ratios (`text-to-image`)	`1:1`, `3:4`, `4:3`, `9:16`, `16:9`
Aspect ratios (`image-to-image`)	`1:1`, `2:3`, `3:2`, `3:4`, `4:3`, `9:16`, `16:9`, `21:9`

Endpoint and authentication

Base URL:

https://api.apixo.ai/api/v1

Method	Endpoint	Purpose
`POST`	`/generateTask/wan-2-5-image`	Submit a generation task
`GET`	`/statusTask/wan-2-5-image?taskId={taskId}`	Poll task status and retrieve results

All requests require your APIXO API key:

Authorization: Bearer YOUR_API_KEY

Submit requests also require:

Content-Type: application/json

Copy-paste async quickstart

This minimal request submits a text-to-image task and returns a taskId.

curl -X POST "https://api.apixo.ai/api/v1/generateTask/wan-2-5-image" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "mode": "text-to-image",
      "prompt": "a cinematic panda in snow",
      "aspect_ratio": "1:1",
      "num_images": 4
    }
  }'

Successful response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678"
  }
}

Save the taskId; you need it to poll for the final result.

Poll for result

curl -X GET "https://api.apixo.ai/api/v1/statusTask/wan-2-5-image?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"

Processing response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "processing",
    "createTime": 1767965610929
  }
}

Success response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://file.apixo.ai/img1.png\",\"https://file.apixo.ai/img2.png\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Failed response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "PromptInvalid",
    "failMsg": "Prompt is invalid or rejected by the model service",
    "createTime": 1767965610929,
    "completeTime": 1767965620132
  }
}

Parse resultJson after state becomes success:

const payload = JSON.parse(data.resultJson);
const imageUrls = payload.resultUrls;

Request body

Text-to-image

{
  "request_type": "async",
  "input": {
    "mode": "text-to-image",
    "prompt": "a cinematic panda in snow",
    "negative_prompt": "blurry, low quality",
    "aspect_ratio": "16:9",
    "num_images": 4
  }
}

Image-to-image

{
  "request_type": "async",
  "input": {
    "mode": "image-to-image",
    "prompt": "merge style of image 2 into image 1 and keep image 3 color mood",
    "negative_prompt": "low quality",
    "aspect_ratio": "3:4",
    "num_images": 3,
    "image_urls": [
      "https://example.com/base.png",
      "https://example.com/style.png",
      "https://example.com/color.png"
    ]
  }
}

Parameters

request_type

string

default:"async"

required

Result delivery mode. Use async for polling with statusTask, or callback for webhook delivery.

callback_url

string

Required when request_type is callback. Must be a callback URL that can receive the final task payload. See Webhooks.

input

object

required

Wan 2.5 Image input parameters.

Show properties

mode

string

required

Generation mode. Supported values: text-to-image, image-to-image.

prompt

string

required

Prompt text. Required for both modes and cannot be empty after trimming. Supports Chinese and English, maximum length is 2000 characters, and excess content is truncated by the model service.

negative_prompt

string

Optional negative prompt. Supports Chinese and English, maximum length is 500 characters, and excess content is truncated by the model service.

aspect_ratio

string

default:"1:1"

Output aspect ratio. text-to-image: 1:1, 3:4, 4:3, 9:16, 16:9. image-to-image: 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9, 21:9.

num_images

integer

default:"4"

Number of images requested. Supports 1-4. Accepts integer input (numeric strings are also accepted).

image_urls

string[]

Required for image-to-image. Must contain 1-3 image URLs. Image constraints: formats JPEG/JPG/PNG (no alpha), BMP, WEBP; width and height 384-5000 px; file size <=10MB. Ignored in text-to-image.

Response format

Submit task response

POST /generateTask/wan-2-5-image returns a task ID when the task is accepted:

code

integer

API status code. 200 means the task was accepted.

message

string

Human-readable status message.

data.taskId

string

Unique task identifier used with the status endpoint.

Status response fields

taskId

string

Unique task identifier.

state

string

Current task state: pending, processing, success, or failed.

resultJson

string

JSON string containing generated image URLs in resultUrls. Present when state is success.

failCode

string

Machine-readable failure code. Present when state is failed.

failMsg

string

Human-readable failure message. Present when state is failed.

createTime

integer

Task creation timestamp in Unix milliseconds.

completeTime

integer

Task completion timestamp in Unix milliseconds. Present after completion.

costTime

integer

Processing duration in milliseconds. Present after completion when provider timing is available.

If at least one image succeeds, the task can still return success, and resultJson.resultUrls includes only successful images.

Webhook callback mode

Use callback mode when your backend should receive the final result automatically instead of polling.

curl -X POST "https://api.apixo.ai/api/v1/generateTask/wan-2-5-image" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "callback",
    "callback_url": "https://your-server.com/webhooks/apixo",
    "input": {
      "mode": "image-to-image",
      "prompt": "turn this into a cinematic movie still",
      "aspect_ratio": "16:9",
      "num_images": 2,
      "image_urls": [
        "https://example.com/source-1.png"
      ]
    }
  }'

See Webhooks for delivery requirements and retry behavior.

Billing

Wan 2.5 Image is billed per generated image.

Mode	APIXO price
`text-to-image`	`$0.03 / image`
`image-to-image`	`$0.03 / image`

Billing behavior:

precharge = requested_num_images * unit_price_for_mode
final_charge = successful_images * unit_price_for_mode
refund = precharge - final_charge (if partial failure)

For current public pricing, see Pricing. If this route is not listed there, backend billing follows ModelPricing.md.

Latency and polling

Wan 2.5 Image tasks are asynchronous. The backend does not provide a fixed public latency SLA; actual latency varies by prompt complexity, requested image count, media fetch speed, and queue load.

Workflow	Recommended first poll	Poll interval
`text-to-image`	10s after task creation	5s-10s
`image-to-image`	10s-15s after task creation	5s-10s

For production workloads, use callback mode to avoid frequent polling.

Rate limits and concurrency can vary by account, API key, and route. If you receive 429, slow down requests and retry with backoff. For account-level details, see System APIs.

Errors and troubleshooting

HTTP errors

Code	Meaning	What to do
`400`	Invalid request body, parameter type, or value	Fix the request before retrying
`401`	Missing or invalid API key	Check the `Authorization` header
`402`	Insufficient balance or quota	Add balance or switch account/key
`403`	Key or route cannot access the model	Check permissions and route strategy
`429`	Rate limit or concurrency limit reached	Retry with exponential backoff
`500`	Server error	Retry with backoff
`502`	Third-party model service error	Retry with backoff
`504`	Third-party model timeout	Retry or use callback mode

Task failure codes

failCode is route-dependent and may come from mapped third-party model failures. Common values include:

Fail code	Meaning	What to do
`PromptInvalid`	Prompt is invalid or rejected by the model service	Rewrite the prompt and retry
`MissingParameter` / `BadRequest`	Required fields are missing or malformed	Check required fields for the selected mode
`SensitiveContentDetected` / `ProhibitedContentDetected`	Prompt or media failed safety checks	Rewrite prompt or change input images
`RateLimitExceeded`	Model service or route rate limit was reached	Retry with backoff
`Task TimeOut` / `Timeout`	Generation did not finish in time	Retry or use callback mode

Parameter troubleshooting

prompt is required for both modes and cannot be empty.
image_urls is required only for image-to-image, and must contain 1-3 items.
num_images supports 1-4; if omitted, default is 4.
aspect_ratio must match the selected mode’s supported set.
aspect_ratio defaults to 1:1 when omitted.
In text-to-image, any provided image_urls input is ignored.

See Error Codes for the full error reference.

Documentation Index

​Overview

​Endpoint and authentication

​Copy-paste async quickstart

​Poll for result

​Request body

​Text-to-image

​Image-to-image

​Parameters

​Response format

​Submit task response

​Status response fields

​Webhook callback mode

​Billing

​Latency and polling

​Errors and troubleshooting

​HTTP errors

​Task failure codes

​Parameter troubleshooting

​Related links

Overview

Endpoint and authentication

Copy-paste async quickstart

Poll for result

Request body

Text-to-image

Image-to-image

Parameters

Response format

Submit task response

Status response fields

Webhook callback mode

Billing

Latency and polling

Errors and troubleshooting

HTTP errors

Task failure codes

Parameter troubleshooting

Related links