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POST
/
v3
/
async
/
flux-1-kontext-max
FLUX.1 Kontext Max
curl --request POST \
  --url https://api.myrouter.ai/v3/async/flux-1-kontext-max \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "prompt": "<string>",
  "images": [
    "<string>"
  ],
  "seed": 123,
  "guidance_scale": 123,
  "safety_tolerance": "<string>",
  "aspect_ratio": "<string>"
}
'
{
  "task_id": "<string>"
}
FLUX.1 Kontext Max is a model that improves prompt adherence and font generation consistency while maintaining efficient speed and suitability for editing tasks.

​
Request Headers

​
Content-Type
string
required
Enum: application/json
​
Authorization
string
required
Bearer authentication format: Bearer {{API Key}}.

​
Request Body

​
prompt
string
required
The prompt used for image generation.
​
images
string[]
List of images used for image generation. Supports up to 4 images.
​
seed
integer
Random seed. Default: -1, where -1 means use a random seed. Range: [-1 ~ 2147483647].
​
guidance_scale
number
Guidance scale for controlling generation. Default: 3.5. Range: [1.0 ~ 20.0].
​
safety_tolerance
string
Only supported in text-to-image mode.
Safety tolerance level for generated images, 1 is the strictest, 5 is the most permissive. Default: 2.
Options: 1, 2, 3, 4, 5
​
aspect_ratio
string
Aspect ratio of the generated image.
Options: 21:9, 16:9, 4:3, 3:2, 1:1, 2:3, 3:4, 9:16, 9:21

​
Response

​
task_id
string
required
The task_id of the async task. Use the task_id to call the Get Async Task Result API to retrieve the generated result.