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

> ## Agent Instructions
> Public hosts only: console https://omnimux.ai/dashboard · API https://api.omnimux.ai · docs https://docs.omnimux.ai.
> Gateway auth is Authorization: Bearer sk-… on https://api.omnimux.ai/v1 (OpenAI-compatible Chat Completions and related paths).
> Discover pages from /llms.txt; full site dump /llms-full.txt; product skill /skill.md; docs search MCP /mcp. Prefer .md page URLs for Markdown.
> Default docs locale is en; zh mirrors the same relative paths. Do not invent model ids not present on live pricing or the complete API pages.

# GPT-4o mini 语音合成

> GPT-4o mini 语音合成 · model `gpt-4o-mini-tts`

* 调用 `POST /v1/audio/speech`，`model` 为 `gpt-4o-mini-tts`
* 请求体必填 `model`、`input`、`voice`
* 成功返回二进制音频流（默认 `audio/mpeg`）

## 身份

| 字段    | 值                 |
| ----- | ----------------- |
| 系列    | 音频系列              |
| 品牌    | GPT Audio         |
| model | `gpt-4o-mini-tts` |

## 接口

| 方法     | 路径                 |
| ------ | ------------------ |
| `POST` | `/v1/audio/speech` |

Base URL：`https://api.omnimux.ai`

## 鉴权

| 名称              | 位置     | 类型     | 必填 | 说明                       |
| --------------- | ------ | ------ | -- | ------------------------ |
| `Authorization` | header | string | 是  | `Bearer sk-...`（API Key） |

## 请求体

| 字段                | 类型     | 必填 | 说明                                                          |
| ----------------- | ------ | -- | ----------------------------------------------------------- |
| `model`           | string | 是  | 固定为 `gpt-4o-mini-tts`                                       |
| `input`           | string | 是  | 要转换的文本（最多 4096 字符）                                          |
| `voice`           | string | 是  | 音色名称（如 `alloy`, `echo`, `fable`, `onyx`, `nova`, `shimmer`） |
| `response_format` | string | 否  | 输出格式：`mp3`（默认）、`opus`、`aac`、`flac`、`wav`、`pcm`              |
| `speed`           | number | 否  | 语速倍率（`0.25` 到 `4.0`，默认 `1.0`）                               |

## 响应

### 200

返回 `Content-Type: audio/mpeg` 二进制音频数据。

错误形态见右栏示例。

<Panel>
  <RequestExample>
    ```bash cURL theme={null}
    curl --request POST \
      --url https://api.omnimux.ai/v1/audio/speech \
      --header 'Authorization: Bearer <token>' \
      --header 'Content-Type: application/json' \
      --data '{
      "model": "gpt-4o-mini-tts",
      "input": "你好！欢迎使用 OmniMux 语音合成服务。",
      "voice": "alloy"
    }' \
      --output speech.mp3
    ```
  </RequestExample>

  <ResponseExample>
    ```json 400 theme={null}
    {
      "error": { "message": "Invalid request", "type": "invalid_request_error", "code": "bad_request" }
    }
    ```

    ```json 401 theme={null}
    {
      "error": { "message": "Invalid token", "type": "authentication_error", "code": "unauthorized" }
    }
    ```

    ```json 402 theme={null}
    {
      "error": {
        "message": "Insufficient quota. Please top up your account.",
        "type": "insufficient_quota",
        "code": "insufficient_quota"
      }
    }
    ```

    ```json 429 theme={null}
    {
      "error": { "message": "Rate limit exceeded", "type": "rate_limit_error", "code": "rate_limit_exceeded" }
    }
    ```

    ```json 500 theme={null}
    {
      "error": { "message": "Internal server error", "type": "server_error", "code": "internal_error" }
    }
    ```
  </ResponseExample>
</Panel>