# LTX-Video 13B 0.9.8 Distilled · Extend API

> ᠪᡳᠮᡝ ᠵᠠᠯᠠᠨ ᠪᡝ 0.9.8 distilled 13B ᡳ ᠵᠠᠩ ᡩᡝ ᠪᠠᠶᠠᠯᠠᠮᡝ ᠵᠠᠩᡳ `prompt` ᡳ ᠵᠠᠯᠠᠮᠪᡳ

`video` ᡩᡝ ᠠᠪᡠᠯᡥᠠ ᠵᠠᠯᠠᠨ ᠪᡝ ᠵᠠᠯᠠᠮᡝ ᠵᠠᠩᡳ `prompt` ᡳ ᠵᠠᠩ ᡩᡝ ᠪᠠᠶᠠᠯᠠᠮᠪᡳ᠃ ᠮᡠᠶᠠᠨ 480p ᠪᠠ 720p᠂ `aspect_ratio` ᠪᡝ auto᠂ 9:16᠂ 1:1 ᠪᠠ 16:9 ᠣᠴᡳ ᠵᠠᠯᠠᠮᠪᡳ᠃ `num_frames` 9 ᠣᠴᡳ 1441᠃ `constant_rate_factor` (0 ᠣᠴᡳ 51) ᠵᠠᠯᠠᠨ ᠪᡝ ᠵᠠᠩ ᡳ ᠮᡠᠶᠠᠨ ᡩᡝ ᠵᠠᠯᠠᠮᡝ ᠣᠯᡥᠣᠪᡠᡵᡝᠮᡝ ᠰᡠᠯᡩᡝᠪᡠᡵᡝᠮᡝ ᠪᡝ ᠪᠠᠶᠠᠯᠠᠮᠪᡳ᠂ `loras` ᡩᡝ ᠪᡝᠶᡝᠨᡳ ᠵᠠᠩᡤᠠᠨ ᠪᡝ ᠠᠪᡠᠮᠪᡳ᠃

- Model id: `ltxv-13b-098-distilled/extend`
- Made by: Lightricks
- Category: Video to Video
- Output: video
- Price per second of your output video: from $0.02 / second of output video (cheapest run $0.02 (20 API credits))
- Run: `POST https://api.doitong.ru/v1/run/ltxv-13b-098-distilled/extend`
- Quote: `POST https://api.doitong.ru/v1/quote/ltxv-13b-098-distilled/extend`
- Docs page: https://doitong.com/mnc/developers/models/ltxv-13b-098-distilled/extend

## Pricing

Price: **from $0.02 / second of output video** (the lowest tier; the quote prices your exact input). Price per second of your output video: the input files are measured before the run (length, resolution, frame rate). The quote measures the same files and is exactly what the run charges.

The full example input below costs $0.101 = 101 API credits (5.0417 s output video × $0.02).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/ltxv-13b-098-distilled/extend` 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

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  |  | ᡥᡡᠯᠠᠨ ᡳ ᠵᡠᠰᡝᠨ ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝ ᡩᠠᠯᡳᠮᡝ. |
| `negative_prompt` |  | string | no | `worst quality, inconsistent motion, blurry, jittery, distorted` |  | ᠪᡠᠶᡝᠮᡝ ᡳ ᡝᠯᡝᠮᡝ ᡥᡡᠯᠠᠨ. |
| `loras` |  | array of object {path, weight_name, scale} | no | `[]` |  | ᠪᡠᠶᡝᠮᡝ ᡩᡝ ᠵᠠᠯᡳᠨ ᡩᡝ ᠣᠮᡝ ᡩᠠᠯᠵᡳᠮᡝ LoRA ᠵᡠᠰᡝᠨ. |
| `loras[].path` |  | string | yes |  |  | LoRA ᠵᡠᠰᡝᠨ ᡳ ᠵᠠᠯᡳᠨ, URL ᠠᠮᠠ ᡶᡳᠯᡝ ᡳ ᠵᡠᠯᡤᠠᠨ. |
| `loras[].weight_name` |  | string \| null | no |  |  | HuggingFace ᠮᡠᠯᡥᠠᠨ ᡩᡝ ᠵᡝᠯᡳᠨ ᠵᡠᠰᡳᡤᠠᠨ ᡳ ᠮᡝᠨᡝ ᠰᠣᠩᡤᠣᠮᡝ ᠠᠰᡠᠯᠠᠮᡝ; `path` ᠣᠴᡳ ᠮᡠᠯᡥᠠᠨ ᡩᡝ ᠣᠮᠪᡳᠮᡝ. |
| `loras[].scale` |  | number | no | `1` | 0 – 4 | LoRA ᠵᡠᠰᡝᠨ ᡳ ᠠᠯᡳᠮᡝ ᡩᠠᠯᡳᠮᡝ ᡤᡝᠨᡝᠮᡝ ᠪᡠᠶᡝᠮᡝ. |
| `resolution` |  | enum (string) | no | `720p` | `480p`, `720p` | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨ. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `9:16`, `1:1`, `16:9`, `auto` | ᠰᡠᠨᡤᠠ ᡳ aspect ratio᠉ |
| `seed` |  | integer \| null | no |  |  | ᠪᡠᠶᡝᠮᡝ ᡳ ᠵᡠᠸᠠᠨ ᡝᡵᡝᠮᡝ ᡩᠠᠯᡵᡝᠮᡝ. |
| `num_frames` |  | integer | no | `121` | 9 – 1,441 | ᠰᡠᠨᡤᠠ ᡳ ᡶᡳᠯᡝᠮᡝ ᡳ ᡩᡠᠮᡝ ᠵᡠᠸᠠᠨ. |
| `first_pass_num_inference_steps` |  | integer | no | `8` | 2 – 12 | ᡝᠯᡝᠮᡝ ᡳ ᡳᠯᡝᠨ ᡳ ᡩᠠᠯᡳᠮᡝ ᡩᠠᠯᠵᡳᠯᠠᠨ. |
| `second_pass_num_inference_steps` |  | integer | no | `8` | 2 – 12 | ᡝᠯᡝᠮᡝ ᡳ ᡩᡠᠮᡝ ᡳ ᡩᠠᠯᡳᠮᡝ ᡩᠠᠯᠵᡳᠯᠠᠨ. |
| `second_pass_skip_initial_steps` |  | integer | no | `5` | 1 – 11 | ᡩᡠᠮᡝ ᡳ ᡳᠯᡝᠨ ᡳ ᡩᠠᠯᡳᠮᡝ ᡩᠠᠯᠵᡳᠯᠠᠨ ᡳ ᡝᠯᡝᠮᡝ, ᡩᡠᠮᡝ ᡳ ᠵᠠᠯᠠᠨ ᡳ ᡵᠠᠰᡠ ᡩᡝ ᡝᠯᡝᠮᡝ ᠣᠮᡝ. |
| `frame_rate` |  | integer | no | `24` | 1 – 60 | ᠰᡠᠨᡤᠠ ᡳ ᡶᡳᠯᡝᠮᡝ ᡳ ᠰᡝᠮᡝᠨ. |
| `expand_prompt` |  | boolean | no | `false` |  | ᡥᡡᠯᠠᠨ ᡳ ᡝᠯᡝᠮᡝ ᡩᡝ ᡤᡳᠰᡠᠨ ᡳ ᠮᠣᠳᡝᠯ ᡳ ᠠᠯᡳᠨ. |
| `reverse_video` |  | boolean | no | `false` |  | ᠰᡠᠨᡤᠠ ᡳ ᡩᠠᠯᡳᠮᡝ ᡳ ᠵᠠᠯᡳᠨ ᡳ ᡩᠠᠯᠠᠨ. |
| `enable_safety_checker` |  | boolean | no | `true` |  | ᡨᠣᡴᡨᠣᠨ ᠪᠠᡳᠴᠠᡵᠠ ᡝᠪᡠᠨ, ᠨᠠᡴᠠᠪᡠᡵᡝ ᡨᠣᡴᡨᠣᠪᡠᠨ ᠪᡝ ᡩᠠᠮᡠ ᡶᠠᠰᠠᡥᠠ ᡩᠠᠩᠰᡝ ᡩᡝ ᠠᠯᡳᠮᠪᡳ. ᡨᡝᡵᡝ ᡶᠠᠰᠠᡥᠠᠨ ᠠᡴᡡ ᡤᡝᠮᡠ ᡤᡝᡪᡳᠯᡝᠨ ᠪᡝ ᡨᠣᡴᡨᠣᠨ ᠪᠠᡳᠴᠠᠮᠪᡳ. |
| `enable_detail_pass` |  | boolean | no | `false` |  | ᡝᡵᡝᠮᡝ ᡳ ᡩᠠᠯᡳᠮᡝ ᡩᡠᠮᡝ ᡳ ᠵᠠᠯᠠᠨ ᡩᡝ ᡝᠯᡝᠮᡝ ᠵᡠᠰᡳᠯᡝᠮᡝ. |
| `temporal_adain_factor` |  | number | no | `0.5` | 0 – 1 | ᠠᠯᡳᠮᡝ ᠠᠯᡳᠨᠠᠮᡝ ᡳ ᡶᡳᠯᡝᠮᡝ ᡳ ᡵᠠᠰᡠ, ᡳᠨᡠ ᡩᠠᠯᠵᡳᠮᡝ ᡤᡝᠮᡠ ᠰᡠᠨᡤᠠ ᡩᡝ ᡩᠠᠯᡳᠮᡝ ᡝᠯᡝᠮᡝ ᠵᠠᠯᠠᠨ ᡳ ᠵᡠᠰᡝᠨ. |
| `tone_map_compression_ratio` |  | number | no | `0` | 0 – 1 | ᡳᠯᡤᠠᠨ ᡳ ᡤᡝᠯᡳᠮᡝ ᡳ ᡩᠠᠯᡳᠮᡝ, 0.0 ᡩᡝ ᡩᠠᠯᡳᠮᡝ ᠠᡴᡡ, 1.0 ᡩᡝ ᡤᡝᠮᡠ ᡩᠠᠯᡳᠮᡝ. ᠵᠠᠯᠠᠨ ᡳ ᡳᠯᡝᠨ ᡳ ᡩᠠᠯᡳᠮᡝ ᠵᠠᠯᠠᠨ ᡳ ᡶᡠᠯᡤᠠᠨ ᡳ ᡴᠠᠮᡳ. |
| `constant_rate_factor` |  | integer | no | `29` | 0 – 51 | ᡝᡵᡝᠮᡝ ᡳ ᡩᠠᠯᡳᠮᡝ ᡩᠠᠯᡳᠮᡝ ᡳ ᡤᡝᠯᡳᠮᡝ ᡳ ᡩᠠᠯᡳᠮᡝ CRF. |
| `video` |  | object {video_url, start_frame_num, strength, limit_num_frames, max_num_frames, resample_fps, target_fps, reverse_video} | yes |  |  | ᡝᠯᡝᠮᡝ ᡳ ᠮᠠᠨᠵᡳᠮᡝ ᡳ ᠰᡠᠨᡤᠠ. |
| `video.video_url` |  | string (video URL) | yes |  |  | URL ᡩᠠᠯᡳ ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝ ᡳ ᠰᡠᠨᡤᠠ. |
| `video.start_frame_num` |  | integer | no | `0` | 0 – 1,440 | ᠰᡠᠨᡤᠠ ᡩᡝ ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝ ᡳ ᡳᠯᡝᠨ ᡳ ᠵᡠᠸᠠᠨ, 8 ᡩᡝ ᡩᠠᠯᡳᠮᡝ ᡶᡳᠯᡝᠮᡝ ᡳ ᠵᡠᠯᡤᠠᠨ. |
| `video.strength` |  | number | no | `1` | 0 – 1 | ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝ ᡳ ᡩᠠᠯᡳᠮᡝ: 0.0 ᡳ ᡴᠠᠮᡳ ᠠᡴᡡ, 1.0 ᡳ ᡤᡝᠮᡠ ᡩᠠᠯᡳᠮᡝ. |
| `video.limit_num_frames` |  | boolean | no | `false` |  | ᠰᡠᠨᡤᠠ ᡳ ᡶᡳᠯᡝᠮᡝ ᡳ ᡤᠠᠯᠠ ᡩᠠᠯᡳᠮᡝ: `max_num_frames` ᠣᠮᠪᡳ ᡶᡳᠯᡝᠮᡝ ᡳ ᡤᠠᠯᠠ. |
| `video.max_num_frames` |  | integer | no | `1441` | 1 – 1,441 | ᠰᠤᠨᡤᠠ ᡳ ᡶᡳᠯᡝᠮᡝ ᡳ ᡤᠠᠯᠠ, None ᡳ ᡤᡝᠮᡠ ᠰᡠᠨᡤᠠ ᡳ ᠠᠯᡳᠨ. |
| `video.resample_fps` |  | boolean | no | `false` |  | ᠰᡠᠨᡤᠠ ᡳ ᡩᡠᡵᡠᠨ ᡳ ᡥᡡᡵᡩᡠᠨ ᠪᡝ ᡥᠠᠯᠠᡵᠠ ᡶᡳᡨᠠ: ᠨᡝᡳᠪᡠᠴᡳ᠈ `target_fps` ᡩᡝ ᡨᠣᡴᡨᠣᠪᡠᡥᠠ ᡥᡡᡵᡩᡠᠨ ᡳ ᠰᠣᠨᡤᡴᠣᡳ ᠰᡠᠨᡤᠠ ᠪᡝ ᡩᠠᡥᡳᠨ ᡩᡠᡵᡠᠨ ᡤᠠᡳᠮᠪᡳ᠉ |
| `video.target_fps` |  | integer | no | `24` | 1 – 60 | FPS ᡩᡝ ᡶᡳᠯᡝᠮᡝ ᡳ ᠰᡝᠮᡝᠨ, `resample_fps` ᡳ ᠰᡝᠮᡝᠨ ᡩᡝ ᠠᠯᡳᠨ. |
| `video.reverse_video` |  | boolean | no | `false` |  | ᠰᡠᠨᡤᠠ ᡳ ᠵᡠᠯᡤᠠᠨ ᡳ ᡩᠠᠯᡳᠮᡝ ᡳ ᠠᠯᡳᠨ ᡩᡝ ᡶᡳᠯᡝᠮᡝ ᡩᠠᠯᠠᠨ. |

## Example input

Required parameters only:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "video": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  }
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "video": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  }
}
```

## 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.ru/v1/run/ltxv-13b-098-distilled/extend?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",
    "video": {
      "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
    }
  }'

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

### JavaScript

```javascript
const API = "https://api.doitong.ru/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/ltxv-13b-098-distilled/extend?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",
    "video": {
      "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
    }
  }),
});
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.ru/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",
    "video": {
        "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    },
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/ltxv-13b-098-distilled/extend", 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.ru/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": "ltxv-13b-098-distilled/extend",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "video": {
          "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
        }
      },
      "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": "ltxv-13b-098-distilled/extend",
  "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": 101,
    "usd": "0.101",
    "charged": 101,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "video": {
      "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
    }
  },
  "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
    },
    "prompt": "Woman walking on a street in Tokyo",
    "seed": 42
  },
  "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.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | ᠪᡠᠶᡝᠮᡝ ᠵᡠᠴᡝᠨ ᡳ ᡶᡳᠯᡝ᠉ |
| `prompt` | string | ᠪᡠᠶᡝᠮᡝ ᡳ ᡥᡡᠯᠠᠨ᠉ |
| `seed` | integer | ᠪᡠᠶᡝᠮᡝ ᡩᡝ ᠶᠠᠪᡠᡥᠠᠨ ᠪᠠᠨᠵᡳᠨᠠᠮᡝ᠉ |

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## Links

- HTML page: https://doitong.com/developers/models/ltxv-13b-098-distilled/extend
- 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=ltxv-13b-098-distilled/extend
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/ltxv-13b-098-distilled/extend