# ElevenLabs Eleven v4 Turbo, fast text to speech

ElevenLabs Eleven v4 Turbo, fast text to speech, served by fal.ai. Convert text into speech with Eleven v4 Turbo from ElevenLabs. Price: $0.04 per 1,000 characters of text, pro rata (at most 5,000 characters per request). Waits up to 40 s for the result; if the generation takes longer, the run stays RUNNING and returns a request_id; poll fal/status and fetch fal/result with model "elevenlabs/tts" and that request_id. Billed once, when the result is ready; a generation that fails is refunded.

- Tool ID: `fal/elevenlabs-tts-v4-turbo`
- Provider: [fal.ai](/providers/fal.md)
- Category: [Audio](/tools/audio.md)
- Price: $0.04 / unit
- Authentication: an authorised Agentik workspace is required for execution, including zero-price tools.

## Pricing contract

The provider’s price, with no markup. Billed for measured usage.


```json
{
  "model": "per_unit",
  "amountUsd": 0.04,
  "unitsField": "text",
  "unitsMeasure": "chars",
  "unitsPer": 1000,
  "fractional": true,
  "unitsDefault": 1,
  "maxUnits": 5
}
```

Pricing source: [https://fal.ai/models/elevenlabs/tts/eleven-v4-turbo](https://fal.ai/models/elevenlabs/tts/eleven-v4-turbo) — $0.04 per 1,000 characters of text, pro rata (at most 5,000 characters per request)..

Price verification date: 2026-09-30.

## Complete input schema


```json
{
  "type": "object",
  "properties": {
    "output_format": {
      "type": "string",
      "title": "Output Format",
      "description": "Output format of the generated audio. Formatted as codec_sample_rate_bitrate.",
      "enum": [
        "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"
      ],
      "default": "mp3_44100_128"
    },
    "apply_text_normalization": {
      "type": "string",
      "title": "Apply Text Normalization",
      "description": "Whether to normalize text such as numbers and dates before generation.",
      "enum": [
        "auto",
        "on",
        "off"
      ],
      "default": "auto"
    },
    "text": {
      "type": "string",
      "maxLength": 5000,
      "title": "Text",
      "description": "The text to convert to speech. Supports audio tags such as [whispering] and IPA pronunciation enclosed in forward slashes.",
      "minLength": 1
    },
    "timestamps": {
      "type": "boolean",
      "title": "Timestamps",
      "description": "Whether to return character-level timing information with the generated audio.",
      "default": false
    },
    "similarity_boost": {
      "type": "number",
      "maximum": 1,
      "minimum": 0,
      "description": "How closely the output follows the reference voice. Higher values increase similarity but may reduce naturalness.",
      "default": 0.75,
      "title": "Similarity Boost"
    },
    "language_code": {
      "type": "string",
      "title": "Language Code",
      "description": "Language code (ISO 639-1) for speech generation and text normalization."
    },
    "voice": {
      "type": "string",
      "description": "The voice to use for speech generation",
      "title": "Voice",
      "default": "Rachel"
    },
    "seed": {
      "type": "integer",
      "maximum": 4294967295,
      "minimum": 0,
      "title": "Seed",
      "description": "Seed for best-effort reproducibility. Identical output is not guaranteed."
    },
    "stability": {
      "type": "number",
      "maximum": 1,
      "minimum": 0,
      "description": "Voice stability. Lower values allow more expressive delivery; higher values make delivery more consistent.",
      "default": 0.5,
      "title": "Stability"
    }
  },
  "required": [
    "text"
  ],
  "additionalProperties": false
}
```

## Published example

This is the provider tool’s published example. Replace example values with the user’s requested inputs, respecting the schema; do not execute an example merely to test a connection.


```json
{
  "tool_id": "fal/elevenlabs-tts-v4-turbo",
  "input": {
    "text": "Hello from Agentik, this is a short health check."
  }
}
```

## Execute and retrieve

Inspect again before execution, explain the price and obtain the required authority. Use MCP run_tool or POST /v1/run with this tool ID, valid input and an idempotency key. Save the returned run ID and follow the actual state. If Agentik answers that the tool is temporarily unavailable, do not retry it blindly; use discovery to propose an alternative.

This tool uses deferred settlement. Follow its returned task/run instructions; preserve the existing reservation until the result is reconciled.

A partial or uncertain result can still have consumed provider resources. Consult [billing](/docs/billing.md), [idempotency](/docs/idempotency.md) and [asynchronous results](/docs/async.md).

[Provider documentation](https://fal.ai/models/elevenlabs/tts/eleven-v4-turbo)

[REST inspection](https://api.agentik.cc/v1/tools/fal/elevenlabs-tts-v4-turbo) · [OpenAPI](/openapi.json) · [Connection guide](/connect.md)

---

[HTML page](/tools/fal/elevenlabs-tts-v4-turbo) · [Agent index](/llms.txt)