# PixVerse V4 Text To Video Fast API

> Amrywiad testun-i-fideo V4 cyflymach sy'n cyrraedd 720p ar y mwyaf ac sydd heb opsiwn hyd

Fersiwn cyflymach o fodel testun-i-fideo V4. Mae'n derbyn `prompt` testunol ac yn cynnig allbwn 360p, 540p neu 720p, heb 1080p na gosodiad `duration`. Cefnogir pum cymhareb agwedd o 16:9 i 9:16, ynghyd â `negative_prompt`, `seed` a rhagosodiad `style` (anime, 3d_animation, clay, comic, cyberpunk). Mae promptiau wedi'u cyfyngu i 2048 beit UTF-8.

- Model id: `pixverse/v4/text-to-video/fast`
- Made by: PixVerse
- Category: Text to Video
- Output: video
- Price: from $0.30 / request (cheapest run $0.30 (300 API credits))
- Run: `POST https://api.doitong.ru/v1/run/pixverse/v4/text-to-video/fast`
- Quote: `POST https://api.doitong.ru/v1/quote/pixverse/v4/text-to-video/fast`
- Docs page: https://doitong.com/cy/developers/models/pixverse/v4/text-to-video/fast

## Pricing

Price: **from $0.30 / request** (the lowest tier; the quote prices your exact input). Billed once per request.

Price rules (the first rule that matches the input wins; a parameter you leave out counts as its default):

- When `resolution` = 720p: $0.40 (400 API credits) / request
- When `resolution` = 1080p: $0.80 (800 API credits) / request

The full example input below costs $0.40 = 400 API credits (1 request × 400 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.ru/v1/quote/pixverse/v4/text-to-video/fast` 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 |  |  | Anogiad cynhyrchu fideo â therfyn maint seiliedig ar feitiau: gall testun sy'n fyr yn weledol ragori arno pan fydd emoji, llythrennau ag acenion, neu nodau nad ydynt yn Lladin yn defnyddio sawl beit fesul nod. Yr uchafswm hyd wedi'i amgodio yw 2048 beit gan ddefnyddio UTF-8; nid yw cyfrif nodau'n pennu a yw'n ffitio. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | Cymhareb agwedd ar gyfer y fideo allbwn. |
| `resolution` |  | enum (string) | no | `720p` | `360p`, `540p`, `720p` | Cydraniad y fideo allbwn. |
| `negative_prompt` |  | string | no | `` |  | Anogiad cynhyrchu negyddol â therfyn hyd seiliedig ar feitiau: gall testun sy'n fyr yn weledol ragori ar y terfyn oherwydd bod emoji, llythrennau ag acenion a nodau nad ydynt yn Lladin yn defnyddio sawl beit. Yr uchafswm yw 2048 beit wedi'i fesur yn UTF-8, nid cyfrif nodau. |
| `style` |  | enum (string) \| null | no |  | `anime`, `3d_animation`, `clay`, `comic`, `cyberpunk` | Arddull a gymhwysir i'r fideo a gynhyrchir. |
| `seed` |  | integer \| null | no |  |  | Hadau ar gyfer cynhyrchu fideo ailadroddadwy. Er mwyn atgynhyrchu'n union ar bob rhediad, rhaid cadw fersiwn y model, yr anogiad a'r hedyn heb eu newid. |
| `enable_safety_checker` |  | boolean | no | `true` |  | Gellir llacio'r sgrinio drwy osod false, ar yr amod bod y galwr wedi'i awdurdodi. |

## 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.ru/v1/run/pixverse/v4/text-to-video/fast?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.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/pixverse/v4/text-to-video/fast?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.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",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/pixverse/v4/text-to-video/fast", 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": "pixverse/v4/text-to-video/fast",
      "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": "pixverse/v4/text-to-video/fast",
  "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": 400,
    "usd": "0.40",
    "charged": 400,
    "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.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} | Fideo a gynhyrchir gan y model. |

## Related models

- [PixVerse V3.5 Text To Video](https://doitong.com/developers/models/pixverse/v3.5/text-to-video.md) (`pixverse/v3.5/text-to-video`): from $0.15 / run
- [PixVerse V3.5 Text To Video Fast](https://doitong.com/developers/models/pixverse/v3.5/text-to-video/fast.md) (`pixverse/v3.5/text-to-video/fast`): from $0.30 / request
- [PixVerse V4 Text To Video](https://doitong.com/developers/models/pixverse/v4/text-to-video.md) (`pixverse/v4/text-to-video`): from $0.15 / run
- [PixVerse Swap](https://doitong.com/developers/models/pixverse/swap.md) (`pixverse/swap`): from $0.15 / run
- [PixVerse V3.5 Effects](https://doitong.com/developers/models/pixverse/v3.5/effects.md) (`pixverse/v3.5/effects`): from $0.15 / run
- [PixVerse V3.5 Image To Video](https://doitong.com/developers/models/pixverse/v3.5/image-to-video.md) (`pixverse/v3.5/image-to-video`): from $0.15 / run
- [PixVerse V3.5 Image To Video Fast](https://doitong.com/developers/models/pixverse/v3.5/image-to-video/fast.md) (`pixverse/v3.5/image-to-video/fast`): from $0.30 / request
- [PixVerse V3.5 Transition](https://doitong.com/developers/models/pixverse/v3.5/transition.md) (`pixverse/v3.5/transition`): from $0.15 / run

## Links

- HTML page: https://doitong.com/developers/models/pixverse/v4/text-to-video/fast
- 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=pixverse/v4/text-to-video/fast
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/pixverse/v4/text-to-video/fast