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

# Gemini 3.8 Flash TTS

> Google's flagship creative voice: studio-grade acting in 130 languages, two-speaker dialogue with natural back-and-forth, and 30 studio voices plus a library of more than 2,000.

Google's flagship creative voice: studio-grade acting in 130 languages, two-speaker dialogue with natural back-and-forth, and 30 studio voices plus a library of more than 2,000. Direct each line with a short delivery note such as "whispered, nervous"; add moments like \<laugh> or \<short pause> right in the text.

| | |
| - | - |
| Model id | `gemini-3.8-flash-tts` |
| Media | audio |
| Submit to | `POST /v1/audio` |
| Price | 0.0275 credits per 1,000 input tokens + 0.495 credits per 1,000 output tokens before discounts |
| Typical time | about 8.0 s |

## Request

**Required:** `text`\
**Optional:** `delivery`, `voice_name`

```json theme={null}
{
  "model": "gemini-3.8-flash-tts",
  "text": "Did you hear that? <short pause> Something is moving out there.",
  "voice_name": "Zephyr"
}
```

| Field | Allowed | Default |
| - | - | - |
| `delivery` | text | |
| `voice_name` | `Zephyr`, `Puck`, `Charon`, `Kore`, `Fenrir`, `Leda`, `Orus`, `Aoede`, `Callirrhoe`, `Autonoe`, `Enceladus`, `Iapetus` … | `"Zephyr"` |

Reference inputs take asset ids from [`POST /v1/uploads`](/uploads) or an earlier output's `asset_id`.
Prices and allowed values come from the live catalog; `GET /v1/models/gemini-3.8-flash-tts` is always current.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.