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

# Inworld TTS-2 Flash (streaming)

> Inworld's lower-latency, lower-cost TTS-2 variant over one WebSocket.

**Streaming text-to-speech** · Inworld

## Call it

Endpoint: `POST /v1/realtime/sessions` — set `model` to `inworld-tts-2-flash`.

```bash cURL theme={"dark"}
# Mints a short-lived relay ticket; open the returned websocket URL with it
curl -X POST https://api.aireserve.com/v1/realtime/sessions \
  -H "Authorization: Bearer $AIRESERVE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "inworld-tts-2-flash", "voice": "Ashley"}'
```

Full request and response reference: [Streaming voice guide](https://docs.aireserve.com/capabilities/streaming-voice.md).

## IDs & aliases

| Send as `model` | What it is |
| - | - |
| `inworld-tts-2-flash` | Canonical gateway id |

## Specs

| Spec | Detail |
| - | - |
| Modality | Audio & voice — Streaming text-to-speech |
| Model maker | Inworld |
| Served by | Inworld |
| Pricing | \$15 / 1M characters · of text sent — see guide |
| Hosting | United States |

Prices are public list rates at generation time and may lag the provider card; `GET /v1/models` and the portal's pricing page are authoritative for billing.

> [card] [Browse all models](https://docs.aireserve.com/models.md)
>
> Search and filter every model by modality, maker, capability and price.


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