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

# Welcome to Boson AI

> Choose the Higgs API for live conversation, generated speech, or talking-avatar video.

Boson AI provides three developer APIs for interactive voice, generated speech, and avatar video. Start with the outcome you need—the products use different inputs, outputs, and interaction models.

## What do you want to build?

<CardGroup cols={3}>
  <Card title="Higgs Realtime" icon="bolt" href="/models/higgs-realtime/overview">
    Use Higgs Realtime for a persistent session that listens, handles interruptions and tools, and streams a response.
  </Card>

  <Card title="Higgs TTS 3" icon="microphone" href="/models/higgs-tts/overview">
    Convert text into natural speech for playback, files, or an audio stream. No conversational session required.
  </Card>

  <Card title="Higgs Avatar" icon="face-smile" href="/models/higgs-avatar/overview">
    Generate talking-head video from a still image and driving audio or text.
  </Card>
</CardGroup>

## Compare the APIs

| Product                                           | Input                          | Output                  | Interaction model                  | Best for                                       |
| ------------------------------------------------- | ------------------------------ | ----------------------- | ---------------------------------- | ---------------------------------------------- |
| [Higgs Realtime](/models/higgs-realtime/overview) | Live audio or text             | Streaming audio or text | Persistent, two-way session        | Voice agents, interruptions, and tool use      |
| [Higgs TTS 3](/models/higgs-tts/overview)         | Text                           | Generated audio         | One request or audio stream        | Narration, voiceovers, and speech playback     |
| [Higgs Avatar](/models/higgs-avatar/overview)     | Still image plus audio or text | Generated video         | Video job or fragmented MP4 stream | Presenters, characters, and talking-head video |

## Start building

<CardGroup cols={2}>
  <Card title="Try the Realtime quickstart" icon="play" href="/models/higgs-realtime/overview#quickstart">
    Play your first streamed Higgs Realtime response with Python.
  </Card>

  <Card title="Set up authentication" icon="key" href="/authentication">
    Create an API key, store it safely, and choose server or client-side authentication.
  </Card>
</CardGroup>