# Eleven v4 Text to Speech API

> Pinakaexpressive na voice modelo ng ElevenLabs, na may inline emotion tag at word timestamp.

Binibigkas ng Eleven v4 ang teksto gamit ang natural at emosyonal na mga boses at nauunawaan ang inline audio tag gaya ng [excited] o [whispering], pati ang mga pagbigkas sa IPA. Pumili ng boses, i-tune ang stability at similarity, itakda ang wika, at opsyonal na kumuha ng mga timestamp sa antas ng salita. Mga format na MP3, PCM, Opus at telephony.

- Model id: `elevenlabs/tts/eleven-v4`
- Made by: ElevenLabs
- Category: Text to Speech
- Output: audio
- Price: $0.08 / 1000 characters (cheapest run $0.08 (80 API credits))
- Run: `POST https://api.doitong.ru/v1/run/elevenlabs/tts/eleven-v4`
- Quote: `POST https://api.doitong.ru/v1/quote/elevenlabs/tts/eleven-v4`
- Docs page: https://doitong.com/fil/developers/models/elevenlabs/tts/eleven-v4

## Pricing

Price: **$0.08 / 1000 characters**. Billed per character of `text` (the price is per 1000 characters).

The full example input below costs $0.004 = 4 API credits (48 characters × 80 API credits / 1000 characters).

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/elevenlabs/tts/eleven-v4` 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 |
|---|---|---|---|---|---|---|
| `text` |  | string | yes |  | 1 – 5000 characters | Ibigay ang speech content bilang text, na maaaring lagyan ng audio tags gaya ng [whispering] o ng IPA pronunciation sa pagitan ng mga forward slash. |
| `voice` |  | string | no | `Rachel` |  | Voice na pinili para sa speech synthesis. |
| `stability` |  | number | no | `0.5` | 0 – 1 | Binabalanse ng voice stability ang mas ekspresibong delivery sa mababang setting at mas pare-parehong delivery sa mataas na setting. |
| `similarity_boost` |  | number | no | `0.75` | 0 – 1 | Kontrol sa pagkakahawig ng reference voice, na maaaring magkaroon ng kapalit sa naturalness: pinatitibay ng mas mataas na value ang match ngunit maaaring maging mas hindi natural ang tunog ng output. |
| `seed` |  | integer \| null | no |  | 0 – 4,294,967,295 | Seed na ginagamit upang subukang makakuha ng reproducible na mga resulta; hindi ginagarantiya ang eksaktong pag-uulit ng output. |
| `language_code` |  | string \| null | no |  |  | ISO 639-1 language code na ginagamit sa pagbuo ng speech at pagno-normalize ng text. |
| `output_format` |  | enum (string) | no | `mp3_44100_128` | `mp3_22050_32`, `mp3_44100_32`, `mp3_44100_64`, `mp3_44100_96`, `mp3_44100_128`, `mp3_44100_192`, `pcm_8000`, `pcm_16000`, `pcm_22050`, `pcm_24000`, `pcm_44100`, `pcm_48000`, `ulaw_8000`, `alaw_8000`, `opus_48000_32`, `opus_48000_64`, `opus_48000_96`, `opus_48000_128`, `opus_48000_192` | Format ng nabuong audio, tinukoy gamit ang pattern na codec_sample_rate_bitrate. |
| `apply_text_normalization` |  | enum (string) | no | `auto` | `auto`, `on`, `off` | Kinokontrol ang normalisasyon ng text bago ang pagbuo, kabilang ang paghawak sa mga numero at petsa. |
| `timestamps` |  | boolean | no | `false` |  | Kinokontrol kung may kasamang timing data para sa mga indibidwal na character ang nabuong audio. |

## Example input

Required parameters only:

```json
{
  "text": "[excited] Hello! Welcome to the future of voice."
}
```

A fuller example:

```json
{
  "text": "[excited] Hello! Welcome to the future of voice.",
  "voice": "Aria"
}
```

## 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/elevenlabs/tts/eleven-v4?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "[excited] Hello! Welcome to the future of voice.",
    "voice": "Aria"
  }'

# 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/elevenlabs/tts/eleven-v4?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "text": "[excited] Hello! Welcome to the future of voice.",
    "voice": "Aria"
  }),
});
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 = {
    "text": "[excited] Hello! Welcome to the future of voice.",
    "voice": "Aria",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/elevenlabs/tts/eleven-v4", 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": "elevenlabs/tts/eleven-v4",
      "input": {
        "text": "[excited] Hello! Welcome to the future of voice.",
        "voice": "Aria"
      },
      "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": "elevenlabs/tts/eleven-v4",
  "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": 4,
    "usd": "0.004",
    "charged": 4,
    "refunded": 0
  },
  "input": {
    "text": "[excited] Hello! Welcome to the future of voice.",
    "voice": "Aria"
  },
  "output": {
    "audio": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp3",
      "content_type": "audio/mpeg",
      "file_name": "0-output.mp3",
      "file_size": 1843200
    },
    "timestamps": []
  },
  "outputs": [
    {
      "type": "audio",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp3",
      "content_type": "audio/mpeg",
      "file_size": 1843200,
      "duration": 12,
      "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 |
|---|---|---|
| `audio` | object {url, content_type, file_name, file_size} | Audio file na ginawa sa pagbuo. |
| `timestamps` | array of any \| null | Timing data ng nabuong speech, isinasama lamang sa mga kahilingang may `timestamps` na nakatakda sa True, na may timestamp para sa bawat salita. |

## Related models

- [Eleven v4 Turbo](https://doitong.com/developers/models/elevenlabs/tts/eleven-v4-turbo.md) (`elevenlabs/tts/eleven-v4-turbo`): $0.04 / 1000 characters
- [Elevenlabs Tts Eleven V3](https://doitong.com/developers/models/elevenlabs/tts/eleven-v3.md) (`elevenlabs/tts/eleven-v3`): $0.10 / 1000 characters
- [MiniMax Speech 2.8 HD](https://doitong.com/developers/models/minimax/speech-2.8-hd.md) (`minimax/speech-2.8-hd`): $0.10 / 1000 characters
- [Elevenlabs](https://doitong.com/developers/models/elevenlabs/text-to-dialogue/eleven-v3.md) (`elevenlabs/text-to-dialogue/eleven-v3`): $0.10 / run
- [ElevenLabs TTS Multilingual v2](https://doitong.com/developers/models/elevenlabs/tts/multilingual-v2.md) (`elevenlabs/tts/multilingual-v2`): $0.10 / 1000 characters
- [ElevenLabs TTS Turbo v2.5](https://doitong.com/developers/models/elevenlabs/tts/turbo-v2.5.md) (`elevenlabs/tts/turbo-v2.5`): $0.05 / 1000 characters
- [Async Text to Speech Pro V1.0](https://doitong.com/developers/models/async/tts-pro/v1.0.md) (`async/tts-pro/v1.0`): $0.01 / 1000 characters
- [Bytedance Seed Speech Text to Speech](https://doitong.com/developers/models/bytedance/seed-speech/tts/v2.md) (`bytedance/seed-speech/tts/v2`): $0.03 / 1000 characters

## Links

- HTML page: https://doitong.com/developers/models/elevenlabs/tts/eleven-v4
- 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=elevenlabs/tts/eleven-v4
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/elevenlabs/tts/eleven-v4