Wan2.1 Image | EmpirioLabs AI Docs

Alibaba Cloud · Image Generation

POST /v1/images/generations

Alibaba’s Wan 2.1 text-to-image model with turbo and plus tiers and up to 1440x1440 output at low per-image pricing.

At a glance

Field	Value
Model id	`wan2-1-image`
Model release date	2025-02-25
Input modalities	Text
Output modalities	Image
Context window	-
Weight precision	-
Region	Singapore
Features	image_generation
Native inference	No
New	No
Supported endpoints	`POST /v1/images/generations`
Alternate model ids	`alibaba/wan-2.1-image`, `wan2.1-image`

Pricing

Charge	Spec	Rate
Turbo	per image	$0.025
Plus	per image	$0.05

Example request

$ curl https://api.empiriolabs.ai/v1/images/generations \
>   -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \
>   -H 'Content-Type: application/json' \
>   -d '{"model": "wan2-1-image", "prompt": "a misty forest at dawn", "size": "1024x1024"}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	yes	-	Text prompt (up to 500 characters).
`model_tier`	enum	no	`"turbo"`	turbo: faster and cheaper. plus: higher fidelity. · Allowed: `turbo`, `plus`
`aspect_ratio`	enum	no	`"1:1"`	Output aspect ratio. · Allowed: `1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`
`num_images`	number	no	`1`	Number of images to generate. Each is billed separately. · Range: 1 – 4
`negative_prompt`	string	no	`""`	What to avoid in the output.
`prompt_extend`	boolean	no	true	Let the service rewrite the prompt for better results.
`watermark`	boolean	no	false	Add a provenance watermark to the output.
`seed`	number	no	-	Reproducibility seed. Leave empty for random. · Range: 0 – 2147483647
`response_format`	enum	no	`"url"`	Return signed URLs or base64 image data. · Allowed: `url`, `b64_json`

Notes

Text-to-image only. Turbo is faster and cheaper; plus is the higher-fidelity tier. Output sizes run up to 1440x1440 with prompts up to 500 characters.

Content safety

Generated images pass an automated content-safety check. An image flagged as explicit is not returned. Because the image is generated before the check runs, a flagged generation is still billed.

Machine-readable schema: GET https://api.empiriolabs.ai/v1/models/wan2-1-image.