⌘K

FLUX.1 Kontext [pro]

flux_kontext_pro

Flux Kontext Pro provides context-aware image generation with professional features and enhanced understanding of complex prompts.

Authentication

authorization string required

All APIs require authentication via Bearer Token

Get API Key:

Visit API Key Management Page to get your API Key

Usage:

Add to request header:

Authorization: Bearer YOUR_API_KEY

Parameters

model string required

Model ID to use for the request

Options: flux_kontext_pro

prompt string required

Text description of the desired image

input_image string

Base64 encoded image or image URL used as reference. Supports up to 20MB

input_image_2 string

Base64 encoded image or image URL used as reference. Supports up to 20MB

input_image_3 string

Base64 encoded image or image URL used as reference. Supports up to 20MB

input_image_4 string

Base64 encoded image or image URL used as reference. Supports up to 20MB

seed integer

Used for reproducibility. If null or omitted, a random seed is used. Accepts any integer

aspect_ratio string

Image aspect ratio, between 21:9 and 9:21

output_format string

Output format

Options: jpeg, png

Default: jpeg

prompt_upsampling boolean

Whether to perform upsampling on the prompt. If activated, will automatically modify prompt to achieve more creative generation

Default: false

safety_tolerance integer

Input and output moderation tolerance level. 0 means strictest, 6 means least strict

Range: 1 - 6

Default: 2

Polling

Since image generation takes time, you need to poll the task status after creation

The initial response returns the task ID and initial status. The actual generation results must be obtained through polling the task status endpoint

Response Format

error object

Error information, only present when status is failed

code string

Error code

message string

Detailed error message

output array

Generation results, only present when status is completed

content array

List of generated content

type string

Resource type, e.g., image

url string

Generated content URL

usage object

Usage statistics, only present when status is completed

cost string

Total cost in USD

discount number

Discount amount

metadata object

Metadata information

Error Codes

Error information is provided in the error field when status is failed