Kling Kling Video O3 4k Image To Video API | Pricing & Docs

kling/kling-video-o3/4K/image-to-video

Upload a still, write a prompt, and Kling Video O3 4k Image To Video returns a 3-15s cinematic 4K clip with physics-aware motion, on RunComfy models and HTTP API.

1. Get started

Use RunComfy's API to run kling/kling-video-o3/4K/image-to-video. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o3/4K/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image": "https://playgrounds-storage-public.runcomfy.net/tools/7369/media-files/input-example-1.webp",
    "prompt": "Slow cinematic push-in, soft golden hour light, gentle wind moving hair and fabric, shallow depth of field, photoreal 4K detail."
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o3/4K/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image": "https://playgrounds-storage-public.runcomfy.net/tools/7369/media-files/input-example-1.webp",
    "prompt": "Slow cinematic push-in, soft golden hour light, gentle wind moving hair and fabric, shallow depth of field, photoreal 4K detail."
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id; in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server-side fetches (no login/cookies required) and isn't rate-limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre-signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "image",
    "prompt"
  ],
  "properties": {
    "image": {
      "title": "Reference Image",
      "description": "Public URL of the starting frame. This still anchors the subject, composition, and style of the generated 4K clip.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7369/media-files/input-example-1.webp"
    },
    "prompt": {
      "title": "Prompt",
      "description": "Describe the motion, camera move, lighting, and atmosphere you want layered over the reference image.",
      "type": "string",
      "default": "Slow cinematic push-in, soft golden hour light, gentle wind moving hair and fabric, shallow depth of field, photoreal 4K detail."
    },
    "end_image": {
      "title": "End Image",
      "description": "Optional public URL of the last frame. Provide one to lock the motion arc and define exactly where the clip lands.",
      "type": "string"
    },
    "duration": {
      "title": "Duration (seconds)",
      "description": "Length of the generated 4K clip in seconds. Pricing scales linearly with the selected duration.",
      "type": "integer",
      "enum": [
        3,
        4,
        5,
        6,
        7,
        8,
        9,
        10,
        11,
        12,
        13,
        14,
        15
      ],
      "default": 5
    },
    "sound": {
      "title": "Generate Sound",
      "description": "When enabled, synthesize matching ambient audio alongside the 4K video. Pricing is unchanged.",
      "type": "boolean",
      "default": false
    },
    "shot_type": {
      "title": "Shot Type",
      "description": "Editing mode. Use intelligent for auto-decided scope, or customize for prompt-driven manual control.",
      "type": "string",
      "enum": [
        "customize",
        "intelligent"
      ],
      "default": "customize"
    },
    "multi_prompt": {
      "title": "Multi Prompt",
      "description": "Additional prompt segments to guide scene transitions and progressions. The sum of durations in multi_prompt must equal to total video duration.",
      "type": "array",
      "items": {
        "prompt": {
          "title": "Prompt",
          "description": "Additional prompt segment to guide a scene transition or progression.",
          "type": "string",
          "format": "str"
        },
        "duration": {
          "title": "Duration",
          "description": "Duration of the prompt segment in seconds.",
          "type": "integer",
          "format": "int_slider_with_range",
          "minimum": 3,
          "maximum": 15,
          "default": 5
        }
      },
      "maxItems": 20,
      "minItems": 0
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}

RunComfy

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

1. Get started

Use RunComfy's API to run kling/kling-video-o3/4K/image-to-video. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o3/4K/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image": "https://playgrounds-storage-public.runcomfy.net/tools/7369/media-files/input-example-1.webp",
    "prompt": "Slow cinematic push-in, soft golden hour light, gentle wind moving hair and fabric, shallow depth of field, photoreal 4K detail."
  }'

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o3/4K/image-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "image": "https://playgrounds-storage-public.runcomfy.net/tools/7369/media-files/input-example-1.webp",
    "prompt": "Slow cinematic push-in, soft golden hour light, gentle wind moving hair and fabric, shallow depth of field, photoreal 4K detail."
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id; in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "image",
    "prompt"
  ],
  "properties": {
    "image": {
      "title": "Reference Image",
      "description": "Public URL of the starting frame. This still anchors the subject, composition, and style of the generated 4K clip.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7369/media-files/input-example-1.webp"
    },
    "prompt": {
      "title": "Prompt",
      "description": "Describe the motion, camera move, lighting, and atmosphere you want layered over the reference image.",
      "type": "string",
      "default": "Slow cinematic push-in, soft golden hour light, gentle wind moving hair and fabric, shallow depth of field, photoreal 4K detail."
    },
    "end_image": {
      "title": "End Image",
      "description": "Optional public URL of the last frame. Provide one to lock the motion arc and define exactly where the clip lands.",
      "type": "string"
    },
    "duration": {
      "title": "Duration (seconds)",
      "description": "Length of the generated 4K clip in seconds. Pricing scales linearly with the selected duration.",
      "type": "integer",
      "enum": [
        3,
        4,
        5,
        6,
        7,
        8,
        9,
        10,
        11,
        12,
        13,
        14,
        15
      ],
      "default": 5
    },
    "sound": {
      "title": "Generate Sound",
      "description": "When enabled, synthesize matching ambient audio alongside the 4K video. Pricing is unchanged.",
      "type": "boolean",
      "default": false
    },
    "shot_type": {
      "title": "Shot Type",
      "description": "Editing mode. Use intelligent for auto-decided scope, or customize for prompt-driven manual control.",
      "type": "string",
      "enum": [
        "customize",
        "intelligent"
      ],
      "default": "customize"
    },
    "multi_prompt": {
      "title": "Multi Prompt",
      "description": "Additional prompt segments to guide scene transitions and progressions. The sum of durations in multi_prompt must equal to total video duration.",
      "type": "array",
      "items": {
        "prompt": {
          "title": "Prompt",
          "description": "Additional prompt segment to guide a scene transition or progression.",
          "type": "string",
          "format": "str"
        },
        "duration": {
          "title": "Duration",
          "description": "Duration of the prompt segment in seconds.",
          "type": "integer",
          "format": "int_slider_with_range",
          "minimum": 3,
          "maximum": 15,
          "default": 5
        }
      },
      "maxItems": 20,
      "minItems": 0
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}

Upload a still, write a prompt, and Kling Video O3 4k Image To Video returns a 3-15s cinematic 4K clip with physics-aware motion, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Upload a still, write a prompt, and Kling Video O3 4k Image To Video returns a 3-15s cinematic 4K clip with physics-aware motion, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Kling Video O3 4k Image To Video: Cinematic 4K Image Animation on Models and API | RunComfy

Upload a still, write a prompt, and Kling Video O3 4k Image To Video returns a 3-15s cinematic 4K clip with physics-aware motion, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Kling Video O3 4k Image To Video: Cinematic 4K Image Animation on Models and API | RunComfy

Upload a still, write a prompt, and Kling Video O3 4k Image To Video returns a 3-15s cinematic 4K clip with physics-aware motion, on RunComfy models and HTTP API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema