> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# TTS

> Text-to-speech endpoints

## Overview

Text-to-speech endpoints

### Available Operations

* [createSpeech](#createspeech) - Create speech

## createSpeech

Synthesizes audio from the input text. Returns a raw audio bytestream in the requested format (e.g. mp3, pcm, wav).

### Example Usage

```typescript theme={null}
import { OpenRouter } from "@openrouter/sdk";

const openRouter = new OpenRouter({
  httpReferer: "<value>",
  appTitle: "<value>",
  appCategories: "<value>",
  apiKey: process.env["OPENROUTER_API_KEY"] ?? "",
});

async function run() {
  const result = await openRouter.tts.createSpeech({
    speechRequest: {
      input: "Hello world",
      model: "mistralai/voxtral-mini-tts-2603",
      speed: 1,
      voice: "en_paul_neutral",
    },
  });

  console.log(result);
}

run();
```

### Standalone function

The standalone function version of this method:

```typescript theme={null}
import { OpenRouterCore } from "@openrouter/sdk/core.js";
import { ttsCreateSpeech } from "@openrouter/sdk/funcs/ttsCreateSpeech.js";

// Use `OpenRouterCore` for best tree-shaking performance.
// You can create one instance of it to use across an application.
const openRouter = new OpenRouterCore({
  httpReferer: "<value>",
  appTitle: "<value>",
  appCategories: "<value>",
  apiKey: process.env["OPENROUTER_API_KEY"] ?? "",
});

async function run() {
  const res = await ttsCreateSpeech(openRouter, {
    speechRequest: {
      input: "Hello world",
      model: "mistralai/voxtral-mini-tts-2603",
      speed: 1,
      voice: "en_paul_neutral",
    },
  });
  if (res.ok) {
    const { value: result } = res;
    console.log(result);
  } else {
    console.log("ttsCreateSpeech failed:", res.error);
  }
}

run();
```

### Parameters

| Parameter | Type | Required | Description |
| - | - | - | - |
| `request` | [operations.CreateAudioSpeechRequest](../../models/operations/createaudiospeechrequest.mdx) | :heavy\_check\_mark: | The request object to use for the request. |
| `options` | RequestOptions | :heavy\_minus\_sign: | Used to set various options for making HTTP requests. |
| `options.fetchOptions` | [RequestInit](https://developer.mozilla.org/en-US/docs/Web/API/Request/Request#options) | :heavy\_minus\_sign: | Options that are passed to the underlying HTTP request. This can be used to inject extra headers for examples. All `Request` options, except `method` and `body`, are allowed. |
| `options.retries` | [RetryConfig](../../lib/utils/retryconfig.mdx) | :heavy\_minus\_sign: | Enables retrying HTTP requests under certain failure conditions. |

### Response

**Promise\<[ReadableStream\<Uint8Array>](../../models/.mdx)>**

### Errors

| Error Type | Status Code | Content Type |
| - | - | - |
| errors.BadRequestResponseError | 400 | application/json |
| errors.UnauthorizedResponseError | 401 | application/json |
| errors.PaymentRequiredResponseError | 402 | application/json |
| errors.ForbiddenResponseError | 403 | application/json |
| errors.NotFoundResponseError | 404 | application/json |
| errors.PayloadTooLargeResponseError | 413 | application/json |
| errors.TooManyRequestsResponseError | 429 | application/json |
| errors.InternalServerResponseError | 500 | application/json |
| errors.BadGatewayResponseError | 502 | application/json |
| errors.ServiceUnavailableResponseError | 503 | application/json |
| errors.EdgeNetworkTimeoutResponseError | 524 | application/json |
| errors.ProviderOverloadedResponseError | 529 | application/json |
| errors.OpenRouterDefaultError | 4XX, 5XX | \*/\* |