> ## Documentation Index
> Fetch the complete documentation index at: https://docs.goenhance.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# FLUX.2 klein 9B

> FLUX.2 klein 9B text-to-image and image-to-image. Pass `image_list` to edit reference images, or omit it for pure text-to-image.

**Pricing:** 0.4 tokens per image (= $0.008). Text-to-image and image-to-image are priced the same.

Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use `custom_callback_url`) to get the generated image.



## OpenAPI

````yaml POST /api/v1/flux-2-9b
openapi: 3.1.0
info:
  title: GoEnhance API
  description: ''
  version: 1.0.0
servers:
  - url: https://api.goenhance.ai
security:
  - bearerAuth: []
tags:
  - name: Basic
  - name: Video2Video
paths:
  /api/v1/flux-2-9b:
    post:
      tags:
        - ImageAPI
      summary: FLUX.2 klein 9B
      description: >-
        FLUX.2 klein 9B text-to-image and image-to-image. Pass `image_list` to
        edit reference images, or omit it for pure text-to-image.


        **Pricing:** 0.4 tokens per image (= $0.008). Text-to-image and
        image-to-image are priced the same.


        Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use
        `custom_callback_url`) to get the generated image.
      parameters:
        - name: Authorization
          in: header
          description: ''
          required: false
          example: '{{Authorization}}'
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                prompt:
                  type: string
                  minLength: 1
                  maxLength: 2000
                  description: Text prompt describing the image.
                image_list:
                  type: array
                  items:
                    type: object
                    properties:
                      url:
                        type: string
                        format: uri
                  minItems: 1
                  maxItems: 9
                  description: >-
                    Optional reference images, e.g. [{"url": "https://..."}].
                    When provided, runs image-to-image.
                ratio:
                  type: string
                  enum:
                    - '1:1'
                    - '2:3'
                    - '3:2'
                    - '4:3'
                    - '3:4'
                    - '16:9'
                    - '9:16'
                  description: >-
                    Aspect ratio of the generated image. Defaults to the model's
                    own default when omitted.
                custom_callback_url:
                  type: string
                  format: uri
                  description: >-
                    Optional. A publicly accessible HTTPS URL. When the task
                    status changes (processing / success / failed), GoEnhance
                    sends a POST request to this URL. The request body is
                    identical to the response of GET /api/v1/jobs/detail. If
                    your server does not respond with HTTP 200, the notification
                    is retried up to 3 times, with a 3-second timeout per
                    attempt.
                  example: https://your-server.com/goenhance/callback
              required:
                - prompt
            example:
              prompt: A samurai standing in falling cherry blossoms, cinematic
              ratio: '16:9'
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                type: object
                properties:
                  code:
                    type: integer
                  msg:
                    type: string
                  data:
                    type: object
                    properties:
                      img_uuid:
                        type: string
                    required:
                      - img_uuid
                required:
                  - code
                  - msg
                  - data
              examples:
                '1':
                  summary: Success
                  value:
                    code: 0
                    msg: Success
                    data:
                      img_uuid: c12b656c-747a-44fd-9c80-add79b0c52d5
                '2':
                  summary: Insufficient tokens
                  value:
                    code: 100
                    msg: tokens is not enough
          headers: {}
        '401':
          description: ''
          content:
            application/json:
              schema:
                type: object
                properties:
                  code:
                    type: integer
                  msg:
                    type: string
                required:
                  - code
                  - msg
          headers: {}
      deprecated: false
      security: []
components: {}

````