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

# Intro to Realtime TTS

> Generate natural, expressive speech in real time.

Inworld's Realtime TTS models offer ultra-realistic, context-aware speech synthesis, zero data retention, and precise voice cloning capabilities, enabling developers to build natural and engaging experiences with human-like speech quality at an accessible price point.

Our models can be accessed via API ([streaming](/api-reference/ttsAPI/texttospeech/synthesize-speech-stream) and [non-streaming](/api-reference/ttsAPI/texttospeech/synthesize-speech)) or the [TTS Playground](http://platform.inworld.ai/tts-playground).

<CardGroup cols={3}>
  <Card title="Developer quickstart" icon="bolt" href="/quickstart-tts">
    Learn how to make your first API call with a guided tutorial.
  </Card>

  <Card title="TTS Playground" icon="play" href="/tts/tts-playground">
    Try different TTS models and voice cloning in TTS Playground.
  </Card>

  <Card title="Code Examples" icon="play" href="https://github.com/inworld-ai/inworld-api-examples/tree/main/tts">
    Browse ready-to-use GitHub samples for common use cases.
  </Card>
</CardGroup>

## Models

<CardGroup cols={2}>
  <Card title="Realtime TTS-2" icon="wand-magic-sparkles">
    ### Our most powerful and expressive model, available in Research Preview

    * Natural language steering for more contextually aware speech
    * Support for 100+ languages
    * Optimized for real-time use
    * High quality instant voice cloning
  </Card>

  <Card title="Realtime TTS 1.5 Max" icon="sparkles">
    ### Our #1 ranked model, delivering the best balance of quality and speed

    * Rich, expressive, contextually aware speech
    * Support for 15 languages
    * Optimized for real-time use (\<200ms median latency)
    * High quality instant voice cloning
  </Card>

  <Card title="Realtime TTS 1.5 Mini" subtitle="Our ultra-fast model" icon="bolt">
    ### Our ultra-fast, most cost-efficient model. For when latency is the top priority.

    * Ultra-low latency (\~120ms median latency)
    * Support for 15 languages
    * Radically affordable pricing
    * High quality instant voice cloning
  </Card>
</CardGroup>

## Features

| **Feature**                                                                    | **Realtime TTS-2**                        | **Realtime TTS 1.5 Max**                  | **Realtime TTS 1.5 Mini**                 |
| :----------------------------------------------------------------------------- | :---------------------------------------- | :---------------------------------------- | :---------------------------------------- |
| Radically accessible pricing                                                   | [See pricing](https://inworld.ai/pricing) | [See pricing](https://inworld.ai/pricing) | [See pricing](https://inworld.ai/pricing) |
| Quality                                                                        | Maximum stability  and steerability       | #1 ranked, maximum stability              | #1 ranked                                 |
| P50 Latency                                                                    | 200 ms                                    | 200 ms                                    | 120 ms                                    |
| [Instant voice cloning](/tts/voice-cloning)                                    | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |
| Professional voice cloning                                                     | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |
| [Custom pronunciation](/tts/capabilities/custom-pronunciation)                 | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |
| [Multilingual](/tts/capabilities/multilingual)                                 | 100+ languages                            | 15 languages                              | 15 languages                              |
| [Steering](/tts/capabilities/steering)                                         | <Icon icon="check" size={18} />           | <Icon icon="dash" size={18} />            | <Icon icon="dash" size={18} />            |
| [Pause controls](/tts/capabilities/pause-controls)                             | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |
| [Timestamp alignment](/tts/capabilities/timestamps)                            | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |
| [On-premises deployments](/tts/on-premises)                                    | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |
| [Zero data retention](/tts/resources/zero-data-retention)                      | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           | <Icon icon="check" size={18} />           |