# Kling O1 Reference Image to Video [Pro] API

> Pro ווידעא פֿון רעפֿערענצן וואָס האלט פּערסאָנאַזשן און אָביעקטן קאָנסיסטענט, 3 ביז 10 סעקונדעס, אָן אַרײַנגעבונג־ווידעא

שאַפֿט אַ קליפּ פֿון אַ נייטיקן `prompt` מיט ביז 2500 אותיות. רעפֿערירט צו צוגעשטעלטע `elements` ווי @Element1 און צו `image_urls` ווי @Image1; ביז 7 עלעמענטן און רעפֿערענץ־בילדער מעגן ווערן צוזאַמענגעשטעלט. געדויער איז 3 ביז 10 סעקונדעס (סטאַנדאַרט 5), און אַספּעקט־פּראָפּאָרציע איז 16:9, 9:16 אָדער 1:1.

- Model id: `kling-video/o1/reference-to-video`
- Made by: Kling
- Category: Reference to Video
- Output: video
- Price: $0.112 / second (5 s ≈ $0.56) (cheapest run $0.56 (560 API credits))
- Run: `POST https://api.doitong.com/v1/run/kling-video/o1/reference-to-video`
- Quote: `POST https://api.doitong.com/v1/quote/kling-video/o1/reference-to-video`
- Docs page: https://doitong.com/yi/developers/models/kling-video/o1/reference-to-video

## Pricing

Price: **$0.112 / second (5 s ≈ $0.56)**. Billed per second of output (`duration`, default 10).

The full example input below costs $0.56 = 560 API credits (5 s × 112 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/kling-video/o1/reference-to-video` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `enable_safety_checker` |  | boolean | no | `true` |  | זיכערהייט־קאָנטראָלן קענען ווערן אויסגעשלאָסן נאָר מיט אַקאַונט־דערלויבעניש; בקשות אָן דערלויבעניש ווערן שטענדיק קאָנטראָלירט. |
| `prompt` |  | string | yes |  | ≤ 2500 characters | סאָרטירטע רעפֿערענצן נוצן @Element1, @Element2 און ווײַטער פֿאַר עלעמענטן, און @Image1, @Image2 און ווײַטער פֿאַר בילדער. |
| `image_urls` | `images` | array of image URL \| null | no |  |  | נאָך־בילדער וואָס פירן דעם סטיל אָדער אויסזען, אָנגעוויזן אינעם פּראָמפּט מיט @Image1, @Image2 און ווײַטער. עלעמענטן, רעפֿערענץ־בילדער און דאָס אָנהייב־בילד צוזאַמען טאָרן נישט איבערגיין 7 איינטראָגן. יעדער פֿײַל איז באַגרענעצט צו 50 MB, מיט ברייט און הייך פֿון לכל־הפּחות 300 px און אַן אַספּעקט־פֿאַרהעלטעניש פֿון 0.40 ביז 2.50. |
| `elements` |  | array of object {frontal_image_url, reference_image_urls} \| null | no |  |  | כאַראַקטערן אָדער אָביעקטן וואָס זאָלן דערשײַנען אינעם ווידעא, אָנגעוויזן אינעם פּראָמפּט מיט @Element1, @Element2 און ווײַטער. עלעמענטן, רעפֿערענץ־בילדער און דאָס אָנהייב־בילד צוזאַמען טאָרן נישט איבערגיין 7 איינטראָגן. |
| `elements[].frontal_image_url` |  | string (image URL) | yes |  |  | פֿראָנטאַלער בילד וואָס גיט דעם עלעמענטס הויפּט־אויסזען, באַגרענעצט צו 50 MB. ברייט און הייך מוזן יעדער זײַן לכל־הפּחות 300 px, מיט אַן אַספּעקט־פֿאַרהעלטעניש פֿון 0.40 ביז 2.50. דער טיימאַוט איז 20 סעקונדעס. |
| `elements[].reference_image_urls` |  | array of image URL | no |  |  | צושטעלן 1–3 נאָך־רעפֿערענץ־בילדער וואָס ווײַזן פֿאַרשידענע ווינקלען. יעדער בילד מוז האָבן אַן אַספּעקט־פֿאַרהעלטעניש צווישן 0.40 און 2.50, זײַן לכל־הפּחות 300px אין ביידע דימענסיעס און נישט גרעסער ווי 50.0MB. |
| `duration` |  | enum (string) | no | `5` | `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10` | ווידעא־לענג געמאסטן אין סעקונדעס. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `16:9`, `9:16`, `1:1` | ברייט־צו־הייך־פֿאַרהעלטעניש פֿאַר ראַמען אינעם גענערירטן ווידעא. |

File parameters (`images`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/kling-video/o1/reference-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.com/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/kling-video/o1/reference-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/kling-video/o1/reference-to-video", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.com/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "kling-video/o1/reference-to-video",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "kling-video/o1/reference-to-video",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 560,
    "usd": "0.56",
    "charged": 560,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | ווידעא געשאַפֿן דורכן מאָדעל. |

## Related models

- [Kling O1 First Frame Last Frame to Video \[Pro\]](https://doitong.com/developers/models/kling-video/o1/image-to-video.md) (`kling-video/o1/image-to-video`): $0.112 / second
- [Kling O1 First Frame Last Frame to Video \[Standard\]](https://doitong.com/developers/models/kling-video/o1/standard/image-to-video.md) (`kling-video/o1/standard/image-to-video`): $0.084 / second
- [Kling O1 Reference Image to Video \[Standard\]](https://doitong.com/developers/models/kling-video/o1/standard/reference-to-video.md) (`kling-video/o1/standard/reference-to-video`): $0.084 / second
- [Kling O1 Edit Video \[Pro\]](https://doitong.com/developers/models/kling-video/o1/video-to-video/edit.md) (`kling-video/o1/video-to-video/edit`): $0.168 / second of input video
- [Kling O1 Edit Video \[Standard\]](https://doitong.com/developers/models/kling-video/o1/standard/video-to-video/edit.md) (`kling-video/o1/standard/video-to-video/edit`): $0.126 / second of input video
- [Kling O1 Reference Video to Video \[Pro\]](https://doitong.com/developers/models/kling-video/o1/video-to-video/reference.md) (`kling-video/o1/video-to-video/reference`): $0.168 / second
- [Kling O1 Reference Video to Video \[Standard\]](https://doitong.com/developers/models/kling-video/o1/standard/video-to-video/reference.md) (`kling-video/o1/standard/video-to-video/reference`): $0.126 / second
- [Seedance 2.0 Fast Reference to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/fast/reference-to-video.md) (`bytedance/seedance-2.0/fast/reference-to-video`): from $0.113 / second

## Links

- HTML page: https://doitong.com/developers/models/kling-video/o1/reference-to-video
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=kling-video/o1/reference-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/kling-video/o1/reference-to-video