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

# Flux 2 Flex Text-to-Image

> Generate images using Flux 2 Flex model (async)

Generate high-quality images from text using [Black Forest Labs](https://bfl.ai)' FLUX.2 Flex model.

**Key Features:**

* **Adjustable Quality-Speed Tradeoff** - Control generation steps to balance quality and speed
* **Superior Text Rendering** - Industry-leading text generation for posters and product images
* **Multi-Reference Blending** - Blend up to 10 reference images while maintaining style consistency
* **High Resolution Output** - Supports up to 4MP resolution


## OpenAPI

````yaml /en/openapi.yaml POST /generate/k/flux2-flex-text-to-image
openapi: 3.0.0
info:
  contact:
    email: support@sinancode.com
    name: API Support
    url: https://sinancode.com/support
  description: AI Model Task Scheduling Platform API
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
  termsOfService: https://sinancode.com/terms-of-service
  title: TikTomato API
  version: '1.0'
servers:
  - url: https://api.sinancode.com/v1
    description: Production server
security: []
paths:
  /generate/k/flux2-flex-text-to-image:
    post:
      tags:
        - public
      summary: Flux 2 Flex Text-to-Image
      description: Generate images using Flux 2 Flex model (async)
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ka.CreateFlux2FlexTextToImageTaskRequest'
        description: Task parameters
        required: true
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/dto.CreateTaskResponse'
        '400':
          description: Invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/apierror.ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/apierror.ErrorResponse'
        '500':
          description: Server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/apierror.ErrorResponse'
      security:
        - AccessToken: []
components:
  schemas:
    ka.CreateFlux2FlexTextToImageTaskRequest:
      properties:
        aspect_ratio:
          default: auto
          description: Aspect ratio (optional, default auto)
          enum:
            - '1:1'
            - '4:3'
            - '3:4'
            - '16:9'
            - '9:16'
            - '3:2'
            - '2:3'
            - auto
          example: auto
          type: string
        prompt:
          description: Prompt (required, 3-5000 characters)
          example: A humanoid figure with a vintage television set for a head
          maxLength: 5000
          minLength: 3
          type: string
        resolution:
          default: 1K
          description: Resolution (optional, default 1K)
          enum:
            - 1K
            - 2K
          example: 1K
          type: string
      required:
        - prompt
      type: object
    dto.CreateTaskResponse:
      properties:
        task_id:
          description: Task ID
          example: 01234567-89ab-cdef-0123-456789abcdef
          type: string
      required:
        - task_id
      type: object
    apierror.ErrorResponse:
      properties:
        error_code:
          description: Machine-readable error code (e.g., TASK.INVALID_PARAMS)
          type: string
        message:
          description: User-friendly error message
          type: string
      type: object
  securitySchemes:
    AccessToken:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Please use your API Token for authentication

````