# Kokoro TTS

> Kokoro is a lightweight text-to-speech model that delivers comparable quality to larger models while being significantly faster and more cost-efficient.


## Overview

- **Endpoint**: `https://fal.run/fal-ai/kokoro/american-english`
- **Model ID**: `fal-ai/kokoro/american-english`
- **Category**: text-to-audio
- **Kind**: inference
**Tags**: speech



## Pricing

- **Price**: $0.02 per 1000 characters

For more details, see [fal.ai pricing](https://fal.ai/pricing).

## API Information

This model can be used via our HTTP API or more conveniently via our client libraries.
See the input and output schema below, as well as the usage examples.


### Input Schema

The API accepts the following input parameters:


- **`prompt`** (`string`, _optional_):
   Default value: `""`
  - Default: `""`
  - Examples: "The future belongs to those who believe in the beauty of their dreams. So, dream big, work hard, and make it happen!"

- **`voice`** (`VoiceEnum`, _optional_):
  Voice ID for the desired voice. Default value: `"af_heart"`
  - Default: `"af_heart"`
  - Options: `"af_heart"`, `"af_alloy"`, `"af_aoede"`, `"af_bella"`, `"af_jessica"`, `"af_kore"`, `"af_nicole"`, `"af_nova"`, `"af_river"`, `"af_sarah"`, `"af_sky"`, `"am_adam"`, `"am_echo"`, `"am_eric"`, `"am_fenrir"`, `"am_liam"`, `"am_michael"`, `"am_onyx"`, `"am_puck"`, `"am_santa"`
  - Examples: "af_heart"

- **`speed`** (`float`, _optional_):
  Speed of the generated audio. Default is 1.0. Default value: `1`
  - Default: `1`
  - Range: `0.1` to `5`



**Required Parameters Example**:

```json
{}
```

**Full Example**:

```json
{
  "prompt": "The future belongs to those who believe in the beauty of their dreams. So, dream big, work hard, and make it happen!",
  "voice": "af_heart",
  "speed": 1
}
```


### Output Schema

The API returns the following output format:

- **`audio`** (`File`, _required_):
  The generated music
  - Examples: {"url":"https://fal.media/files/elephant/dXVMqWsBDG9yan3kaOT0Z_tmp0vvkha3s.wav"}



**Example Response**:

```json
{
  "audio": {
    "url": "https://fal.media/files/elephant/dXVMqWsBDG9yan3kaOT0Z_tmp0vvkha3s.wav"
  }
}
```


## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://fal.run/fal-ai/kokoro/american-english \
  --header "Authorization: Key $FAL_KEY" \
  --header "Content-Type: application/json" \
  --data '{}'
```

### Python

Ensure you have the Python client installed:

```bash
pip install fal-client
```

Then use the API client to make requests:

```python
import fal_client

def on_queue_update(update):
    if isinstance(update, fal_client.InProgress):
        for log in update.logs:
           print(log["message"])

result = fal_client.subscribe(
    "fal-ai/kokoro/american-english",
    arguments={},
    with_logs=True,
    on_queue_update=on_queue_update,
)
print(result)
```

### JavaScript

Ensure you have the JavaScript client installed:

```bash
npm install --save @fal-ai/client
```

Then use the API client to make requests:

```javascript
import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/kokoro/american-english", {
  input: {},
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);
```


## Additional Resources

### Documentation

- [Model Playground](https://fal.ai/models/fal-ai/kokoro/american-english)
- [API Documentation](https://fal.ai/models/fal-ai/kokoro/american-english/api)
- [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/kokoro/american-english)

### fal.ai Platform

- [Platform Documentation](https://docs.fal.ai)
- [Python Client](https://docs.fal.ai/clients/python)
- [JavaScript Client](https://docs.fal.ai/clients/javascript)