Wan 2.6

Wan 2.6 is Alibaba's video generation model. It supports text-to-video, image-to-video from one first-frame image, and reference-to-video with reference images or videos. Output can be 720p or 1080p.

Models

Model Name	Mode
`wan-2.6-text-to-video`	Text-to-video
`wan-2.6-image-to-video`	Image-to-video from one first-frame image
`wan-2.6-reference-to-video`	Reference-to-video with reference images and videos

Pricing

Billed per second x resolution, matching Wan 2.7 pricing:

Resolution	Credits/sec
`720p`	24
`1080p`	40

Create Task

POST https://api.aivideoapi.ai/v1/videos/generations

Request Body

Field	Type	Required	Description
`model`	string	Yes	One of the model names above
`input`	object	Yes	Generation parameters
`callback_url`	string	No	URL to receive task completion/failure notifications

Common Input

Field	Type	Required	Description
`prompt`	string	Yes	Text prompt, max 1500 characters
`negative_prompt`	string	No	Negative prompt, max 500 characters
`resolution`	string	No	`720p` or `1080p`; default `1080p`
`shot_type`	string	No	`single` or `multi`; default `single`. `multi` requires `prompt_extend` to be true.
`prompt_extend`	boolean	No	Enable prompt rewriting, default `true`
`watermark`	boolean	No	Add a watermark, default `false`
`seed`	integer	No	Integer between `0` and `2147483647`

Text-to-Video Input

Field	Type	Required	Description
`prompt`	string	Yes	Text prompt
`aspect_ratio`	string	No	`16:9`, `9:16`, `1:1`, `4:3`, or `3:4`; default `16:9`
`duration`	integer	No	2-15 seconds, default `5`
`audio_urls`	string[]	No	Optional reference audio URL(s); the first is used

Image-to-Video Input

Field	Type	Required	Description
`prompt`	string	Yes	Text prompt
`image_urls`	string[]	Yes	Exactly 1 public HTTP(S) image URL for the first frame. Base64 is not supported.
`audio_urls`	string[]	No	Optional driving audio URL(s); the first is used
`duration`	integer	No	2-15 seconds, default `5`
`audio`	boolean	No	Whether to generate audio, default decided by the upstream model

Output aspect ratio follows the first-frame image.

Reference-to-Video Input

Field	Type	Required	Description
`prompt`	string	Yes	Text prompt. Refer to references as `character1`, `character2`, etc. by order.
`image_urls`	string[]	No*	Reference image URLs, max 5
`video_urls`	string[]	No*	Reference video URLs, max 3
`aspect_ratio`	string	No	`16:9`, `9:16`, `1:1`, `4:3`, or `3:4`; default `16:9`
`duration`	integer	No	2-10 seconds, default `5`
`audio`	boolean	No	Whether to generate audio, default decided by the upstream model

* At least one of image_urls or video_urls is required, and their combined count cannot exceed 5.

Examples

Text-to-Video

curl -X POST https://api.aivideoapi.ai/v1/videos/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "wan-2.6-text-to-video",
    "callback_url": "https://your-server.com/webhook",
    "input": {
      "prompt": "A cinematic shot of a small robot walking through a rainy neon alley",
      "aspect_ratio": "16:9",
      "resolution": "1080p",
      "duration": 5
    }
  }'

Image-to-Video

curl -X POST https://api.aivideoapi.ai/v1/videos/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "wan-2.6-image-to-video",
    "callback_url": "https://your-server.com/webhook",
    "input": {
      "prompt": "The subject turns toward the camera while the background lights move softly",
      "image_urls": ["https://example.com/first-frame.png"],
      "resolution": "1080p",
      "duration": 5
    }
  }'

Reference-to-Video

curl -X POST https://api.aivideoapi.ai/v1/videos/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "wan-2.6-reference-to-video",
    "callback_url": "https://your-server.com/webhook",
    "input": {
      "prompt": "character1 walks into the room and speaks to character2.",
      "image_urls": ["https://example.com/character1.png"],
      "video_urls": ["https://example.com/character2.mp4"],
      "aspect_ratio": "16:9",
      "resolution": "1080p",
      "duration": 8,
      "shot_type": "multi"
    }
  }'

Response

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "8b6a5162-5c91-4a42-8e80-4c8ef5486f24"
  }
}

Query Task

curl https://api.aivideoapi.ai/v1/tasks/{taskId} \
  -H "Authorization: Bearer sk-your-api-key"

Status transitions: pending -> processing -> completed or failed.

When a task fails, pre-charged credits are automatically refunded.

Error Codes

When a request fails, the API returns a JSON error response:

{
  "error": {
    "code": "insufficient_credits",
    "message": "Your credit balance is too low. Please top up.",
    "type": "billing_error"
  }
}

Error Reference

HTTP Status	Code	Type	Description
400	`invalid_request`	invalid_request_error	Missing or invalid parameters
401	`invalid_api_key`	authentication_error	API key is invalid, disabled, or deleted
402	`insufficient_credits`	billing_error	Credit balance too low, please top up
403	`ip_not_allowed`	permission_error	Request IP not in the key's allowlist
404	`model_not_found`	invalid_request_error	Model does not exist or is inactive
404	`task_not_found`	invalid_request_error	Task ID does not exist
429	`rate_limit_exceeded`	rate_limit_error	Too many requests, please slow down
429	`spend_limit_exceeded`	billing_error	Key spend limit reached (hourly/daily/total)
500	`internal_error`	api_error	Unexpected server error
503	`upstream_error`	upstream_error	Upstream AI provider returned an error

Common Scenarios

invalid_request (400)

Returned when required fields are missing or invalid.

{
  "error": {
    "code": "invalid_request",
    "message": "'model' is required.",
    "type": "invalid_request_error"
  }
}

insufficient_credits (402)

Your balance is too low. Check your balance with GET /v1/credits and top up in Dashboard > Billing.

invalid_api_key (401)

Possible causes:

The key does not start with sk-
The key has been disabled or deleted
The user account has been banned

upstream_error (503)

The upstream AI provider returned an error. This may happen when:

The input contains sensitive or prohibited content
The provider is temporarily unavailable
The request parameters are not supported by the provider

Credits are automatically refunded when a task fails due to upstream errors.