# Kling O1 Image-to-Video

> Video Generation

Submit an asynchronous `kling-video-o1` video generation task.

## Endpoint

`POST https://api.modelverse.cn/v1/tasks/submit`

## Request Body

## Responses

- **200** — Task submitted successfully.
- **400** — Invalid request parameters.
- **401** — Invalid or missing bearer token.
- **default** — Error response.

## OpenAPI Definition

```json
{
  "openapi": "3.1.0",
  "x-language": "en-US",
  "info": {
    "title": "ModelVerse Kling/O1 Video Task API",
    "version": "1.0.0",
    "description": "Self-contained OpenAPI 3.1 schema for the ModelVerse Kling/O1 asynchronous\nvideo task API.\n"
  },
  "servers": [
    {
      "url": "https://api.modelverse.cn",
      "description": "ModelVerse API endpoint documented for this model."
    }
  ],
  "tags": [
    {
      "name": "Kling/O1",
      "description": "Asynchronous video generation and task status operations for Kling/O1."
    }
  ],
  "security": [
    {
      "bearerAuth": []
    }
  ],
  "paths": {
    "/v1/tasks/submit": {
      "post": {
        "tags": [
          "Kling/O1"
        ],
        "operationId": "submitKlingO1VideoTask",
        "summary": "Kling O1 Image-to-Video",
        "description": "Submit an asynchronous `kling-video-o1` video generation task.",
        "security": [
          {
            "bearerAuth": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/KlingO1TaskSubmitRequest"
              },
              "examples": {
                "firstFrame": {
                  "summary": "Generate a video from a prompt and first-frame image",
                  "value": {
                    "model": "kling-video-o1",
                    "input": {
                      "prompt": "A beautiful sunset over the ocean with waves gently crashing"
                    },
                    "parameters": {
                      "mode": "pro",
                      "aspect_ratio": "16:9",
                      "duration": 5,
                      "image_list": [
                        {
                          "image_url": "https://example.com/first_frame.jpg",
                          "type": "first_frame"
                        }
                      ]
                    }
                  }
                },
                "textToVideo": {
                  "summary": "Generate a text-to-video task",
                  "value": {
                    "model": "kling-video-o1",
                    "input": {
                      "prompt": "A cinematic shot of a glass train crossing a snowy mountain bridge at sunrise"
                    },
                    "parameters": {
                      "mode": "pro",
                      "aspect_ratio": "9:16",
                      "duration": 10
                    }
                  }
                },
                "videoEdit": {
                  "summary": "Edit a base video while keeping original sound",
                  "value": {
                    "model": "kling-video-o1",
                    "input": {
                      "prompt": "Replace the background with a neon city street at night"
                    },
                    "parameters": {
                      "mode": "pro",
                      "video_list": [
                        {
                          "video_url": "https://example.com/base-video.mp4",
                          "refer_type": "base",
                          "keep_original_sound": "yes"
                        }
                      ]
                    }
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Task submitted successfully.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1TaskSubmitResponse"
                },
                "examples": {
                  "submitted": {
                    "summary": "Submitted task",
                    "value": {
                      "output": {
                        "task_id": "task_id"
                      },
                      "request_id": "request_id"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Invalid request parameters.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1ErrorResponse"
                },
                "examples": {
                  "invalidParameter": {
                    "$ref": "#/components/examples/KlingO1InvalidParameterError"
                  }
                }
              }
            }
          },
          "401": {
            "description": "Invalid or missing bearer token.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1ErrorResponse"
                },
                "examples": {
                  "authError": {
                    "$ref": "#/components/examples/KlingO1AuthError"
                  }
                }
              }
            }
          },
          "default": {
            "description": "Error response.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1ErrorResponse"
                },
                "examples": {
                  "error": {
                    "$ref": "#/components/examples/KlingO1InvalidParameterError"
                  }
                }
              }
            }
          }
        }
      }
    },
    "/v1/tasks/status": {
      "get": {
        "tags": [
          "Kling/O1"
        ],
        "operationId": "getKlingO1VideoTaskStatus",
        "summary": "Kling O1 Task Status",
        "description": "Query the status and result URLs for an asynchronous `kling-video-o1` task.",
        "security": [
          {
            "bearerAuth": []
          }
        ],
        "parameters": [
          {
            "name": "task_id",
            "in": "query",
            "required": true,
            "description": "Asynchronous task identifier returned by `/v1/tasks/submit`.",
            "schema": {
              "type": "string"
            },
            "examples": {
              "taskId": {
                "value": "task_id"
              }
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Task status response.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1TaskStatusResponse"
                },
                "examples": {
                  "success": {
                    "summary": "Successful task",
                    "value": {
                      "output": {
                        "task_id": "task_id",
                        "task_status": "Success",
                        "urls": [
                          "https://xxxxx/xxxx.mp4"
                        ],
                        "submit_time": 1756959000,
                        "finish_time": 1756959050
                      },
                      "usage": {
                        "duration": 5
                      },
                      "request_id": ""
                    }
                  },
                  "failure": {
                    "summary": "Failed task",
                    "value": {
                      "output": {
                        "task_id": "task_id",
                        "task_status": "Failure",
                        "submit_time": 1756959000,
                        "finish_time": 1756959019,
                        "error_message": "error_message"
                      },
                      "usage": {
                        "duration": 5
                      },
                      "request_id": ""
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Invalid task identifier or request parameters.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1ErrorResponse"
                },
                "examples": {
                  "invalidParameter": {
                    "$ref": "#/components/examples/KlingO1InvalidParameterError"
                  }
                }
              }
            }
          },
          "401": {
            "description": "Invalid or missing bearer token.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1ErrorResponse"
                },
                "examples": {
                  "authError": {
                    "$ref": "#/components/examples/KlingO1AuthError"
                  }
                }
              }
            }
          },
          "default": {
            "description": "Error response.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingO1ErrorResponse"
                },
                "examples": {
                  "error": {
                    "$ref": "#/components/examples/KlingO1InvalidParameterError"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "API key",
        "description": "ModelVerse API key sent as `Authorization: Bearer <MODELVERSE_API_KEY>`."
      }
    },
    "schemas": {
      "KlingO1TaskSubmitRequest": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "model",
          "input"
        ],
        "properties": {
          "model": {
            "type": "string",
            "const": "kling-video-o1",
            "description": "Model name. Fixed to `kling-video-o1` for this API document."
          },
          "input": {
            "$ref": "#/components/schemas/KlingO1Input"
          },
          "parameters": {
            "$ref": "#/components/schemas/KlingO1Parameters"
          }
        }
      },
      "KlingO1Input": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "prompt"
        ],
        "properties": {
          "prompt": {
            "type": "string",
            "minLength": 1,
            "description": "Prompt used to guide video generation."
          }
        }
      },
      "KlingO1Parameters": {
        "type": "object",
        "additionalProperties": false,
        "description": "Optional Kling/O1 generation controls. The source document states that O1 does\nnot support custom subject functionality through `element_list`, so this\nmodel-pinned schema intentionally does not accept `element_list`.\n",
        "properties": {
          "mode": {
            "type": "string",
            "description": "Generation mode. The source document lists `std` and `pro`, but states that\nKling/O1 currently supports only `pro`.\n",
            "enum": [
              "pro"
            ],
            "default": "pro"
          },
          "aspect_ratio": {
            "type": "string",
            "description": "Generated video aspect ratio.",
            "enum": [
              "16:9",
              "9:16",
              "1:1"
            ]
          },
          "duration": {
            "type": "integer",
            "description": "Generated video duration in seconds. For text-to-video and first-frame\nimage-to-video, only 5 and 10 seconds are supported. For video editing\nrequests where a `video_list` item has `refer_type: base`, the output\nfollows the input video duration and this parameter is ignored.\n",
            "enum": [
              3,
              4,
              5,
              6,
              7,
              8,
              9,
              10
            ],
            "default": 5
          },
          "image_list": {
            "type": "array",
            "description": "Image references used to specify the first or final frame.",
            "items": {
              "$ref": "#/components/schemas/KlingO1ImageReference"
            }
          },
          "video_list": {
            "type": "array",
            "description": "Video references used for feature reference or video editing.",
            "items": {
              "$ref": "#/components/schemas/KlingO1VideoReference"
            }
          }
        }
      },
      "KlingO1ImageReference": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "image_url",
          "type"
        ],
        "properties": {
          "image_url": {
            "type": "string",
            "minLength": 1,
            "description": "Image URL or Base64-encoded image data."
          },
          "type": {
            "type": "string",
            "description": "Image role in the generated video.",
            "enum": [
              "first_frame",
              "end_frame"
            ]
          }
        }
      },
      "KlingO1VideoReference": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "video_url",
          "refer_type",
          "keep_original_sound"
        ],
        "properties": {
          "video_url": {
            "type": "string",
            "format": "uri",
            "description": "Video URL."
          },
          "refer_type": {
            "type": "string",
            "description": "Video reference type.",
            "enum": [
              "feature",
              "base"
            ]
          },
          "keep_original_sound": {
            "type": "string",
            "description": "Whether to keep the original audio from the referenced video.",
            "enum": [
              "yes",
              "no"
            ]
          }
        }
      },
      "KlingO1TaskSubmitResponse": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "output",
          "request_id"
        ],
        "properties": {
          "output": {
            "$ref": "#/components/schemas/KlingO1TaskSubmitOutput"
          },
          "request_id": {
            "type": "string",
            "description": "Unique request identifier."
          }
        }
      },
      "KlingO1TaskSubmitOutput": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "task_id"
        ],
        "properties": {
          "task_id": {
            "type": "string",
            "description": "Unique asynchronous task identifier."
          }
        }
      },
      "KlingO1TaskStatusResponse": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "output",
          "request_id"
        ],
        "properties": {
          "output": {
            "$ref": "#/components/schemas/KlingO1TaskStatusOutput"
          },
          "usage": {
            "$ref": "#/components/schemas/KlingO1Usage"
          },
          "request_id": {
            "type": "string",
            "description": "Unique request identifier."
          }
        }
      },
      "KlingO1TaskStatusOutput": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "task_id",
          "task_status"
        ],
        "properties": {
          "task_id": {
            "type": "string",
            "description": "Unique asynchronous task identifier."
          },
          "task_status": {
            "$ref": "#/components/schemas/KlingO1TaskStatus"
          },
          "urls": {
            "type": "array",
            "description": "Video result URL list.",
            "items": {
              "type": "string",
              "format": "uri"
            }
          },
          "submit_time": {
            "type": "integer",
            "format": "int64",
            "description": "Task submission Unix timestamp in seconds."
          },
          "finish_time": {
            "type": "integer",
            "format": "int64",
            "description": "Task completion Unix timestamp in seconds."
          },
          "error_message": {
            "type": "string",
            "description": "Error message returned when the task fails."
          }
        }
      },
      "KlingO1TaskStatus": {
        "type": "string",
        "description": "Current asynchronous task status.",
        "enum": [
          "Pending",
          "Running",
          "Success",
          "Failure"
        ]
      },
      "KlingO1Usage": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "duration": {
            "type": "integer",
            "description": "Video duration in seconds."
          }
        }
      },
      "KlingO1ErrorResponse": {
        "type": "object",
        "additionalProperties": true,
        "required": [
          "error"
        ],
        "properties": {
          "error": {
            "$ref": "#/components/schemas/KlingO1ErrorObject"
          },
          "request_id": {
            "type": "string",
            "description": "Unique request identifier, if available."
          }
        }
      },
      "KlingO1ErrorObject": {
        "type": "object",
        "additionalProperties": true,
        "required": [
          "message",
          "type"
        ],
        "properties": {
          "message": {
            "type": "string",
            "description": "Error message."
          },
          "type": {
            "type": "string",
            "description": "Error type.",
            "enum": [
              "invalid_request_error",
              "timeout",
              "rate_limit_error",
              "internal_error"
            ]
          },
          "code": {
            "type": [
              "string",
              "null"
            ],
            "description": "Machine-readable error code.",
            "enum": [
              "param_error",
              "invalid_messages",
              "sensitive_check_error",
              "model_error",
              "tokens_too_long",
              "auth_error",
              "timeout",
              "rate_limit",
              "internal_error",
              "model_server_error",
              "gateway_timeout_error",
              null
            ]
          },
          "param": {
            "type": [
              "string",
              "null"
            ],
            "description": "Request parameter related to the error."
          }
        }
      }
    },
    "examples": {
      "KlingO1InvalidParameterError": {
        "summary": "Invalid parameter error",
        "value": {
          "error": {
            "message": "Invalid param",
            "type": "invalid_request_error",
            "code": "param_error",
            "param": "parameters.duration"
          },
          "request_id": "request_id"
        }
      },
      "KlingO1AuthError": {
        "summary": "Bearer authentication error",
        "value": {
          "error": {
            "message": "Validate Certification failed",
            "type": "invalid_request_error",
            "code": "auth_error",
            "param": null
          },
          "request_id": "request_id"
        }
      }
    }
  }
}
```