# Chatterbox text to speech fal AI multilingual

Needs text.

Chatterbox, served by fal.ai. $0.025 per 1000 characters Text is limited to 300 characters; the exact receipt determines the final charge. Asynchronous: returns a request_id; poll fal/status and fetch fal/result with model "fal-ai/chatterbox" and that request_id. The exact endpoint/request billing receipt is required before settlement.

- Tool ID: `fal/fal-ai-chatterbox-text-to-speech-multilingual`
- Name in the catalog: Chatterbox, text to speech
- Provider: [fal.ai](/providers/fal.md)
- Capability: [AI audio](/tools/audio-generation.md)
- Price: $0.025 per 1,000 characters
- 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": 0.025,
  "unitsField": "text",
  "unitsMeasure": "chars",
  "unitsPer": 1000,
  "fractional": true,
  "maxUnits": 0.6
}
```

Pricing source: [https://fal.ai/models/fal-ai/chatterbox/text-to-speech/multilingual/llms.txt](https://fal.ai/models/fal-ai/chatterbox/text-to-speech/multilingual/llms.txt). $0.025 per 1000 characters Text is limited to 300 characters; the exact receipt determines the final charge..

Price verification date: 2026-11-03.

## Complete input schema


```json
{
  "type": "object",
  "properties": {
    "exaggeration": {
      "description": "Controls speech expressiveness and emotional intensity (0.25-2.0). 0.5 is neutral, higher values increase expressiveness. Extreme values may be unstable.",
      "minimum": 0.25,
      "type": "number",
      "default": 0.5,
      "maximum": 2,
      "title": "Exaggeration"
    },
    "seed": {
      "description": "Random seed for reproducible results. Set to 0 for random generation, or provide a specific number for consistent outputs.",
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Seed"
    },
    "text": {
      "description": "The text to be converted to speech (maximum 300 characters). Supports 23 languages including English, French, German, Spanish, Italian, Portuguese, Hindi, Arabic, Chinese, Japanese, Korean, and more.",
      "maxLength": 300,
      "type": "string",
      "title": "Text",
      "minLength": 1
    },
    "temperature": {
      "description": "Controls randomness and variation in generation (0.05-2.0). Higher values create more varied speech patterns.",
      "minimum": 0.05,
      "type": "number",
      "default": 0.8,
      "maximum": 2,
      "title": "Temperature"
    },
    "voice": {
      "description": "Language code for synthesis, or a reference audio URL with custom_audio_language selected. Invalid reference audio is rejected with a non-billable 422 error.",
      "type": "string",
      "default": "english",
      "title": "Voice"
    },
    "cfg_scale": {
      "description": "Configuration/pace weight controlling generation guidance (0.0-1.0). Use 0.0 for language transfer to mitigate accent inheritance.",
      "minimum": 0,
      "type": "number",
      "default": 0.5,
      "maximum": 1,
      "title": "CFG Scale"
    },
    "custom_audio_language": {
      "description": "If using a custom audio URL, specify the language of the audio here. Ignored if voice is not a custom url.",
      "anyOf": [
        {
          "type": "string",
          "enum": [
            "english",
            "arabic",
            "danish",
            "german",
            "greek",
            "spanish",
            "finnish",
            "french",
            "hebrew",
            "hindi",
            "italian",
            "japanese",
            "korean",
            "malay",
            "dutch",
            "norwegian",
            "polish",
            "portuguese",
            "russian",
            "swedish",
            "swahili",
            "turkish",
            "chinese"
          ]
        },
        {
          "type": "null"
        }
      ],
      "title": "Custom Audio Language"
    }
  },
  "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/fal-ai-chatterbox-text-to-speech-multilingual",
  "input": {
    "text": "Last month, we reached a new milestone with two billion views on our YouTube channel.",
    "exaggeration": 0.5,
    "temperature": 0.8,
    "voice": "english",
    "cfg_scale": 0.5
  }
}
```

## 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/fal-ai/chatterbox/text-to-speech/multilingual)

[REST inspection](https://api.agentik.cc/v1/tools/fal/fal-ai-chatterbox-text-to-speech-multilingual) · [OpenAPI](/openapi.json) · [Connection guide](/connect.md)

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[HTML page](/providers/fal/fal-ai-chatterbox-text-to-speech-multilingual) · [Agent index](/llms.txt)