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

# Z Image Turbo Image Generation

> - Z Image Turbo is an ultra-fast text-to-image generation model with exceptional quality
- Asynchronous processing mode, use the returned task ID to [query](/en/api-manual/task-management/get-task-detail)
- Generated image links are valid for 24 hours, please save them promptly



## OpenAPI

````yaml /en/api-manual/image-series/z-image-turbo/z-image-turbo-image-generate.json POST /v1/images/generations
openapi: 3.1.0
info:
  title: z-image-turbo Interface
  description: >-
    Create image tasks using AI models with support for multiple models and
    parameter configurations
  license:
    name: MIT
  version: 1.0.0
servers:
  - url: https://api.evolink.ai
    description: Production environment
security:
  - bearerAuth: []
tags:
  - name: Image Generation
    description: AI image generation related APIs
paths:
  /v1/images/generations:
    post:
      tags:
        - Image Generation
      summary: z-image-turbo Interface
      description: >-
        - Z Image Turbo is an ultra-fast text-to-image generation model with
        exceptional quality

        - Asynchronous processing mode, use the returned task ID to
        [query](/en/api-manual/task-management/get-task-detail)

        - Generated image links are valid for 24 hours, please save them
        promptly
      operationId: createImageGeneration
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ImageGenerationRequest'
            examples:
              text_to_image:
                summary: Text to Image
                value:
                  model: z-image-turbo
                  prompt: a cute cat
                  size: '1:1'
      responses:
        '200':
          description: Image generation task created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ImageGenerationResponse'
        '400':
          description: Invalid request parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: invalid_request
                  message: Invalid request parameters
                  type: invalid_request_error
        '401':
          description: Unauthenticated, invalid or expired token
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: unauthorized
                  message: Invalid or expired token
                  type: authentication_error
        '402':
          description: Insufficient quota, recharge required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: insufficient_quota
                  message: Insufficient quota. Please top up your account.
                  type: insufficient_quota
        '403':
          description: Access denied
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: model_access_denied
                  message: 'Token does not have access to model: z-image-turbo'
                  type: invalid_request_error
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: rate_limit_exceeded
                  message: Too many requests, please try again later
                  type: rate_limit_error
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: internal_error
                  message: Internal server error
                  type: api_error
components:
  schemas:
    ImageGenerationRequest:
      type: object
      required:
        - model
        - prompt
      properties:
        model:
          type: string
          description: Image generation model name
          enum:
            - z-image-turbo
          default: z-image-turbo
          example: z-image-turbo
        prompt:
          type: string
          description: >-
            Prompt describing the image to be generated, limited to 2000
            characters
          example: a cute cat
          maxLength: 2000
        size:
          type: string
          description: >-
            Size of the generated image. Supports two formats:


            **Aspect Ratio Format:**

            - Use preset ratios like `1:1`, `16:9`, `9:16`, etc.

            - Supported ratios: `1:1`, `2:3`, `3:2`, `3:4`, `4:3`, `9:16`,
            `16:9`, `1:2`, `2:1`


            **Custom Dimensions:**

            - Width x Height (e.g., `1024x768`)

            - Width and height range: `376-1536` pixels
          enum:
            - '1:1'
            - '2:3'
            - '3:2'
            - '3:4'
            - '4:3'
            - '9:16'
            - '16:9'
            - '1:2'
            - '2:1'
          example: '1:1'
        seed:
          type: integer
          description: |-
            Random seed for reproducible results

            **Note:**
            - Range: `1` to `2147483647`
            - Leave empty for random seed
            - Same seed with same prompt produces similar results
          minimum: 1
          maximum: 2147483647
          example: 12345
        nsfw_check:
          type: boolean
          description: |-
            Enable additional NSFW content moderation

            **Note:**
            - Default: `false` (disabled)
            - Basic content moderation is always active even when disabled
            - Enable for stricter content filtering
          default: false
          example: false
        callback_url:
          type: string
          description: >-
            HTTPS callback address after task completion


            **Callback Timing:**

            - Triggered when task is completed, failed, or cancelled

            - Sent after billing confirmation is completed


            **Security Restrictions:**

            - Only HTTPS protocol is supported

            - Callback to internal IP addresses is prohibited (127.0.0.1,
            10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.)

            - URL length must not exceed `2048` characters


            **Callback Mechanism:**

            - Timeout: `10` seconds

            - Maximum `3` retries on failure (retries after `1` second/`2`
            seconds/`4` seconds)

            - Callback response body format is consistent with the task query
            API response format

            - Callback address returning 2xx status code is considered
            successful, other status codes will trigger retry
          format: uri
          example: https://your-domain.com/webhooks/image-task-completed
    ImageGenerationResponse:
      type: object
      properties:
        created:
          type: integer
          description: Task creation timestamp
          example: 1757165031
        id:
          type: string
          description: Task ID
          example: task-unified-1757165031-uyujaw3d
        model:
          type: string
          description: Actual model name used
          example: z-image-turbo
        object:
          type: string
          enum:
            - image.generation.task
          description: Specific type of the task
        progress:
          type: integer
          description: Task progress percentage (0-100)
          minimum: 0
          maximum: 100
          example: 0
        status:
          type: string
          description: Task status
          enum:
            - pending
            - processing
            - completed
            - failed
          example: pending
        task_info:
          $ref: '#/components/schemas/TaskInfo'
          description: Async task information
        type:
          type: string
          enum:
            - text
            - image
            - audio
            - video
          description: Output type of the task
          example: image
        usage:
          $ref: '#/components/schemas/Usage'
          description: Usage and billing information
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: Error code identifier
            message:
              type: string
              description: Error description
            type:
              type: string
              description: Error type
    TaskInfo:
      type: object
      properties:
        can_cancel:
          type: boolean
          description: Whether the task can be cancelled
          example: true
        estimated_time:
          type: integer
          description: Estimated completion time (seconds)
          minimum: 0
          example: 10
    Usage:
      type: object
      description: Usage and billing information
      properties:
        billing_rule:
          type: string
          description: Billing rule
          enum:
            - per_call
            - per_token
            - per_second
          example: per_call
        credits_reserved:
          type: number
          description: Estimated credits consumed
          minimum: 0
          example: 0.026
        user_group:
          type: string
          description: User group category
          example: default
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        ##All APIs require Bearer Token authentication##


        **Get API Key:**


        Visit [API Key Management Page](https://evolink.ai/dashboard/keys) to
        get your API Key


        **Add to request header:**

        ```

        Authorization: Bearer YOUR_API_KEY

        ```

````