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Kling 1.6: AI Video Generation | Text to Video

kling/kling-1-6/pro/text-to-video

High-fidelity video generation with precise prompt alignment, smooth motion, and cinematic visuals, configurable duration, aspect ratios, and balanced strength for creative control.

1. Get started

Use RunComfy's API to run kling/kling-1-6/pro/text-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-1-6/pro/text-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "A desert road at twilight, bathed in rich amber and violet hues as a lone motorcycle speeds past. The camera pans slowly from the horizon to track the rider, dust clouds catching golden highlights from the fading sun."
  }'

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-1-6/pro/text-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "A desert road at twilight, bathed in rich amber and violet hues as a lone motorcycle speeds past. The camera pans slowly from the horizon to track the rider, dust clouds catching golden highlights from the fading sun."
  }'

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",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "",
      "type": "string",
      "default": "A desert road at twilight, bathed in rich amber and violet hues as a lone motorcycle speeds past. The camera pans slowly from the horizon to track the rider, dust clouds catching golden highlights from the fading sun."
    },
    "duration": {
      "title": "Duration",
      "description": "",
      "type": "integer",
      "enum": [
        5,
        10
      ],
      "default": 5
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "",
      "type": "string",
      "enum": [
        "16:9",
        "9:16",
        "1:1"
      ],
      "default": "16:9"
    },
    "negative_prompt": {
      "title": "Negative Prompt",
      "description": "",
      "type": "string",
      "default": ""
    },
    "cfg_scale": {
      "title": "Prompt Strength",
      "description": "High strength ensures prompt accuracy but reduces diversity.",
      "maximum": 1,
      "minimum": 0,
      "type": "number",
      "default": 0.5
    }
  }
}

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" }
      }
    }
  }
}