Longcat Image Edit

Playground

LongCat-Image Edit is a 6B parameter bilingual (Chinese-English) image editing model from Meituan, excelling at multilingual text rendering, photorealism, and deployment efficiency. Ready-to-use REST inference API with best performance and no cold starts.

Features

LongCat-Image — Edit

LongCat-Image Edit is a 6B parameter image editing model from Meituan, designed for bilingual (Chinese-English) image editing with exceptional text rendering capabilities.

Where LongCat-Image Edit fits best

Editing Chinese and English text in images
Photorealistic image modifications
Marketing and product visuals with text overlays
Typography and layout updates in existing designs

Key Features

• Exceptional Efficiency and Performance

With only 6B parameters, LongCat-Image Edit delivers high-quality results while maintaining efficient resource usage.

• Powerful Chinese Text Rendering

Superior accuracy in rendering and editing Chinese characters with industry-leading Chinese dictionary coverage.

• Bilingual Support

Natively supports both Chinese and English prompts with excellent text rendering in both languages.

• Natural Language Editing

Describe edits in plain language to modify images while preserving the original composition.

LongCat-Image Text-to-Image – Text-to-image generation with the same bilingual capabilities.

More Image Tools on WaveSpeedAI

Nano Banana Pro – Google’s Gemini-based text-to-image model for sharp, coherent, prompt-faithful visuals.
Seedream V4 – ByteDance’s style-consistent, multi-image generator ideal for posters and campaigns.
Qwen Edit Plus – An enhanced Qwen-based image editor for precise inpainting and local style changes.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result


# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/longcat-image/edit" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
    "output_format": "jpeg",
    "seed": -1,
    "enable_sync_mode": false,
    "enable_base64_output": false
}'

# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"

Parameters

Task Submission Parameters

Request Parameters

Parameter	Type	Required	Default	Range	Description
prompt	string	Yes		-	The prompt to edit the image with.
image	string	Yes		-	The image to generate an image from.
output_format	string	No	jpeg	jpeg, png, webp	The format of the output image.
seed	integer	No	-1	-1 ~ 2147483647	The random seed to use for the generation. -1 means a random seed will be used.
enable_sync_mode	boolean	No	false	-	If set to true, the function will wait for the result to be generated and uploaded before returning the response. It allows you to get the result directly in the response. This property is only available through the API.
enable_base64_output	boolean	No	false	-	If enabled, the output will be encoded into a BASE64 string instead of a URL. This property is only available through the API.

Response Parameters

Parameter	Type	Description
code	integer	HTTP status code (e.g., 200 for success)
message	string	Status message (e.g., “success”)
data.id	string	Unique identifier for the prediction, Task Id
data.model	string	Model ID used for the prediction
data.outputs	array	Array of URLs to the generated content (empty when status is not `completed`)
data.urls	object	Object containing related API endpoints
data.urls.get	string	URL to retrieve the prediction result
data.has_nsfw_contents	array	Array of boolean values indicating NSFW detection for each output
data.status	string	Status of the task: `created`, `processing`, `completed`, or `failed`
data.created_at	string	ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”)
data.error	string	Error message (empty if no error occurred)
data.timings	object	Object containing timing details
data.timings.inference	integer	Inference time in milliseconds

Result Request Parameters

Latentsync Longcat Image Text To Image