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

# Kling V3 I2V

> [Core Function] Kling V3 I2V is the next-generation image-to-video model. [Strengths] It transforms static images into video with support for 4K resolution, 15-second durations, and native audio, providing superior motion and character expressiveness. [Best For] Highly recommended for: animating concept art, bringing portraits to life in 4K, and generating long 15s scenes from a single frame. [Limitations] Do NOT use this model if you need multimodal reference elements (like character consistency across shots) or multi-shot generation; use V3 Omni instead. [Routing] Use this model by default for high-quality single-image-to-video tasks.



## OpenAPI

````yaml /model-api/kling/kling-i2v.json post /kling/kling-v3-i2v
openapi: 3.1.0
info:
  description: The image-to-video models API from Kling AI.
  version: 1.0.0
  contact:
    name: Modellix Support
    email: support@modellix.ai
  title: Kling Image-to-Video Models API
servers:
  - url: https://api.modellix.ai/api/v1
    description: The image-to-video models API from Kling AI.
security:
  - bearerAuth: []
paths:
  /kling/kling-v3-i2v:
    post:
      summary: Kling V3 I2V
      description: >-
        [Core Function] Kling V3 I2V is the next-generation image-to-video
        model. [Strengths] It transforms static images into video with support
        for 4K resolution, 15-second durations, and native audio, providing
        superior motion and character expressiveness. [Best For] Highly
        recommended for: animating concept art, bringing portraits to life in
        4K, and generating long 15s scenes from a single frame. [Limitations] Do
        NOT use this model if you need multimodal reference elements (like
        character consistency across shots) or multi-shot generation; use V3
        Omni instead. [Routing] Use this model by default for high-quality
        single-image-to-video tasks.
      operationId: klingV3I2VAsync
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/KlingV3I2VRequest'
            examples:
              single_shot:
                summary: Single-shot image animation
                value:
                  image: https://example.com/keyframe.jpg
                  prompt: >-
                    The subject slowly turns toward the camera while wind moves
                    through their hair
                  resolution: 1080p
                  audio: 'off'
                  duration: 5
      responses:
        '200':
          description: Task submitted successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AsyncTaskResponse'
              example:
                code: 0
                message: success
                data:
                  status: pending
                  task_id: task-v3-i2v-123
                  model_id: model-123
                  get_result:
                    method: GET
                    url: https://api.modellix.ai/api/v1/tasks/task-v3-i2v-123
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  schemas:
    KlingV3I2VRequest:
      type: object
      required:
        - image
        - prompt
      properties:
        prompt:
          type: string
          description: >-
            Video generation prompt. May include both positive and negative
            descriptions in the same text (no separate negative_prompt field).
            For custom multi-shot storyboards, use `shot n, m, words; shot n, m,
            words;` where n is the shot index (1-6), m is shot duration in
            seconds (each >= 1s; sum of all shot durations must equal total
            duration), and words is the per-shot prompt (max 512 characters).
            Max length 3072 (recommended <= 2500).
          minLength: 1
          maxLength: 3072
          example: >-
            shot 1, 2, The subject slowly turns toward the camera; shot 2, 3,
            Wind moves through their hair in a close-up;
        image:
          type: string
          description: First-frame reference image URL or Base64 string.
          minLength: 1
          example: https://example.com/keyframe.jpg
        image_tail:
          type: string
          description: Optional last-frame reference image URL or Base64 string.
          minLength: 1
          example: https://example.com/last-frame.jpg
        audio:
          type: string
          description: >-
            Whether to generate audio for the video. Official settings.audio:
            native | off.
          default: 'off'
          enum:
            - native
            - 'off'
          example: 'off'
        multi_shot:
          type: boolean
          description: >-
            When true, the model automatically plans multi-shot transitions.
            When false, generates a single continuous shot.
          default: true
          example: true
        resolution:
          type: string
          description: Output video resolution. Aspect ratio follows the first frame.
          default: 720p
          enum:
            - 720p
            - 1080p
            - 4k
          example: 1080p
        duration:
          type: integer
          description: Video duration in seconds. Public API accepts integer values.
          default: 5
          enum:
            - 3
            - 4
            - 5
            - 6
            - 7
            - 8
            - 9
            - 10
            - 11
            - 12
            - 13
            - 14
            - 15
          example: 5
      description: >-
        Kling V3 image-to-video request aligned with official settings: audio
        native|off, resolution 720p|1080p|4k, multi_shot, duration.
        image=first_frame, image_tail=last_frame; no aspect_ratio.
    AsyncTaskResponse:
      type: object
      required:
        - code
        - message
        - data
      properties:
        code:
          type: integer
          description: Response code, 0 indicates success
          example: 0
        message:
          type: string
          description: Response message
          example: success
        data:
          type: object
          required:
            - status
            - task_id
            - model_id
          properties:
            status:
              type: string
              enum:
                - pending
                - processing
              description: Task status
              example: pending
            task_id:
              type: string
              description: Unique task identifier
              example: task-abc123
            model_id:
              type: string
              description: Model ID
              example: model-123
            get_result:
              type: object
              description: API information to query the task result
              properties:
                method:
                  type: string
                  description: HTTP method
                  example: GET
                url:
                  type: string
                  description: Full URL to query the task result
                  example: https://api.modellix.ai/api/v1/tasks/task-abc123
          description: Detailed data about the submitted asynchronous task.
    ErrorResponse:
      type: object
      required:
        - code
        - message
      properties:
        code:
          type: integer
          description: Error code (equals HTTP status code)
          example: 400
        message:
          type: string
          description: Error message
          example: 'Invalid parameters: parameter ''image'' is required'
  responses:
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 400
            message: 'Invalid parameters: parameter ''image'' is required'
    Unauthorized:
      description: Unauthorized - Invalid or missing API Key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 401
            message: 'Authentication failed: invalid API key'
    TooManyRequests:
      description: Too many requests - Rate limit exceeded
      headers:
        X-RateLimit-Limit:
          description: Maximum requests per minute
          schema:
            type: integer
            example: 100
        X-RateLimit-Remaining:
          description: Remaining quota in current window
          schema:
            type: integer
            example: 0
        X-RateLimit-Reset:
          description: Rate limit window reset time (Unix timestamp)
          schema:
            type: integer
            example: 1704067260
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 429
            message: >-
              Rate limit exceeded: 100 requests per minute, retry after 60
              seconds
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 500
            message: Internal server error
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'API Key authentication. Format: `Bearer YOUR_API_KEY`.'

````