Stable Image Ultra

POST

/sd/v2beta/stable-image/generate/ultra

Generate

Our most advanced text to image generation service, Stable Image Ultra creates the highest quality images
with unprecedented prompt understanding. Ultra excels in typography, complex compositions, dynamic lighting,
vibrant hues, and overall cohesion and structure of an art piece. Made from the most advanced models,
including Stable Diffusion 3, Ultra offers the best of the Stable Diffusion ecosystem.

Try it out

Grab your API key and head over to

How to use

Please invoke this endpoint with a POST request.

The headers of the request must include an API key in the authorization field. The body of the request must be
multipart/form-data. The accept header should be set to one of the following:

image/* to receive the image in the format specified by the output_format parameter.

application/json to receive the image in the format specified by the output_format parameter, but encoded to base64 in a JSON response.

The only required parameter is the prompt field, which should contain the text prompt for the image generation.

Note: for the full list of optional parameters, please see the request schema below.

Output

The resolution of the generated image will be 1 megapixel. The default resolution is 1024x1024.

Credits

The Ultra service uses 8 credits per successful result. You will not be charged for failed results.

请求参数

Header 参数

authorization

string

必需

Your Stability API key, used to authenticate your requests. Although you may have multiple keys in your account, you should use the same key for all requests to this API.

>= 1 字符

content-type

string

必需

The content type of the request body. Do not manually specify this header; your HTTP client library will automatically include the appropriate boundary parameter.

>= 1 字符

示例值:

multipart/form-data

enum<string>

必需

Specify image/* to get the image bytes directly. Otherwise specify application/json to receive the image as base64 encoded JSON.

枚举值:

application/jsonimage/*

默认值:

image/*

Body 参数multipart/form-data

prompt

string

必需

What you wish to see in the output image. A strong, descriptive prompt that clearly defines
elements, colors, and subjects will lead to better results.

To control the weight of a given word use the format (word:weight),
where word is the word you'd like to control the weight of and weight
is a value between 0 and 1. For example: The sky was a crisp (blue:0.3) and (green:0.8)
would convey a sky that was blue and green, but more green than blue.

>= 1 字符<= 10000 字符

negative_prompt

string

可选

A blurb of text describing what you do not wish to see in the output image.
This is an advanced feature.

<= 10000 字符

aspect_ratio

enum<string>

可选

Controls the aspect ratio of the generated image.

枚举值:

16:91:121:92:33:24:55:49:169:21

默认值:

1:1

示例值:

1:1

seed

number

可选

A specific value that is used to guide the 'randomness' of the generation. (Omit this parameter or pass 0 to use a random seed.)

>= 0<= 4294967294

默认值:

output_format

enum<string>

可选

Dictates the content-type of the generated image.

枚举值:

jpegpngwebp

默认值:

png

示例值:

png

示例代码

Python

JavaScript

Shell

Java

Swift

PHP

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST '/sd/v2beta/stable-image/generate/ultra' \
--header 'authorization;' \
--header 'accept;' \
--form 'prompt=""'

返回响应

🟢200Generation was successful.

application/json

Body

object {0}

示例

{}

🟠400Invalid parameter(s), see the `errors` field for details.

🟠403Your request was flagged by our content moderation system.

🟠413Your request was larger than 10MiB.

🟠422You made a request with an unsupported language.

🟠429You have made more than 150 requests in 10 seconds.

🔴500An internal error occurred. If the problem persists [contact support](https://stabilityplatform.freshdesk.com/support/tickets/new).

ImageGenerations Copy Copy

Stable Image Core

Stable Image Ultra

Try it out#

How to use#

Output#

Credits#

请求参数

示例代码

返回响应

Try it out

How to use

Output

Credits