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

# qwen-audio-3.1-realtime-flash

> A real-time duplex speech model with text and audio input and output, function calling, web search, and voice cloning.

<meta property="og:title" content="qwen-audio-3.1-realtime-flash" />

## Inference service provider

Alibaba Cloud Model Studio.

## Model capabilities

| Capability          | Details                                                                 |
| ------------------- | ----------------------------------------------------------------------- |
| Input modalities    | Text, audio                                                             |
| Output modalities   | Text, audio                                                             |
| Function calling    | Supported                                                               |
| Web search          | Supported                                                               |
| Voice cloning       | Supported                                                               |
| Protocols           | WebSocket, WebRTC, AOQ                                                  |
| Default voice       | `longanqian_v3.1`                                                       |
| Thinking mode       | `enable_thinking` is not supported                                      |
| Interaction modes   | `server_vad`, `smart_turn`, `smart_turn_v2` (recommended), push-to-talk |
| Speaker enhancement | Supported in `smart_turn` and `smart_turn_v2` modes                     |

Enable web search with `enable_search`. Web search and function calling can be enabled together.

## Context limits

| Parameter         | Limit (tokens) |
| ----------------- | -------------- |
| Context window    | 262,144        |
| Max input length  | 245,760        |
| Max output length | 16,384         |

| Audio history in context  | Maximum     |
| ------------------------- | ----------- |
| Max turns                 | 50          |
| Cumulative audio duration | 300 seconds |

## Pricing

Text-only responses are billed at the text output rate. For responses containing both text and audio, only audio output is billed; the accompanying text has no separate output charge.

Prices are in USD per million tokens.

<Tabs>
  <Tab title="Singapore">
| Model ID                        | Text input | Audio input | Text output | Audio output |
| ------------------------------- | ---------- | ----------- | ----------- | ------------ |
| `qwen-audio-3.1-realtime-flash` | \$0.23     | \$0.93      | \$0.7       | \$1.87       |
  </Tab>

  <Tab title="China (Beijing)">
| Model ID                        | Text input | Audio input | Text output | Audio output |
| ------------------------------- | ---------- | ----------- | ----------- | ------------ |
| `qwen-audio-3.1-realtime-flash` | \$0.212    | \$0.848     | \$0.636     | \$1.696      |
  </Tab>
</Tabs>

## Rate limits

WebSocket RPM counts connection requests, not model responses. There is no separate limit on concurrent connections.

<Tabs>
  <Tab title="Singapore">
| Model ID                        | RPM | TPM     | Concurrent WebSocket connections |
| ------------------------------- | --- | ------- | -------------------------------- |
| `qwen-audio-3.1-realtime-flash` | 60  | 100,000 | No separate limit                |
  </Tab>

  <Tab title="China (Beijing)">
| Model ID                        | RPM | TPM     | Concurrent WebSocket connections |
| ------------------------------- | --- | ------- | -------------------------------- |
| `qwen-audio-3.1-realtime-flash` | 60  | 100,000 | No separate limit                |
  </Tab>
</Tabs>

## How to call

- [Real-time speech guide](/en/model-studio/qwen-audio-realtime-user-guides)
- [Model access methods](/en/model-studio/qwen-audio-realtime-model-access)
- [Client events](/en/model-studio/fun-audiochat-client-events)