# Gemini 3.8 Flash-Lite TTS (`gemini_3_8_flash_lite_tts`)

> Gemini 3.8 Flash-Lite TTS by Google. Low-cost natural speech in 101 languages with 30 voices and two-speaker dialogue.

- Capability: Speech (tool `speech`) — Text to speech
- Price: from $0.01 per run (1 credit = $0.01). Exact price for a request: POST https://api.varg.ai/v2/estimate
- Typical time: ~6 s
- JSON Schema: https://api.varg.ai/v2/tools/speech?model=gemini_3_8_flash_lite_tts (public, no key)
- Try it: https://varg.ai/dashboard/tools/playground?model=gemini_3_8_flash_lite_tts

## Call it

REST: `POST https://api.varg.ai/v2/tools/speech/call` with `Authorization: Bearer $VARG_API_KEY` (create a key at https://varg.ai/dashboard/api).
It answers `202` with a job right away. Poll `GET /v2/jobs/{id}` until `status` is `completed`, then read `output.outputs[0].url` — or pass `options.webhook_url` and get the finished job POSTed to you.

```bash
curl -X POST https://api.varg.ai/v2/tools/speech/call \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini_3_8_flash_lite_tts",
  "voice": "Kore"
}'
```

MCP: the varg server `https://mcp.varg.ai/mcp` (OAuth sign-in, no key) runs it with `call_tool`:

```json
{
  "tool": "speech",
  "input": {
    "model": "gemini_3_8_flash_lite_tts",
    "voice": "Kore"
  },
  "wait": true
}
```

## Inputs

| field | type | required | default | allowed | description |
|---|---|---|---|---|---|
| `model` | string | yes | — | `gemini_3_8_flash_lite_tts` or a route key below | Which model runs the job. |
| `text` | string | yes | — | — | — |
| `voice` | string | no | — | — | — |

Media inputs are URLs. Upload a local file first with `POST /v2/files` and pass the returned URL.

## Provider options

Optional, per provider, under `provider_options.<provider>`. Only the options of the provider that runs the job apply — pin a route to choose it.

### provider_options.fal

| field | type | required | default | allowed | description |
|---|---|---|---|---|---|
| `prompt` | string | no | — | — | — |
| `voice` | string | no | — | Achernar \| Achird \| Algenib \| Algieba \| Alnilam \| Aoede \| Autonoe \| Callirrhoe \| Charon \| Despina \| Enceladus \| Erinome \| Fenrir \| Gacrux \| Iapetus \| Kore \| Laomedeia \| Leda \| Orus \| Pulcherrima \| Puck \| Rasalgethi \| Sadachbia \| Sadaltager \| Schedar \| Sulafat \| Umbriel \| Vindemiatrix \| Zephyr \| Zubenelgenubi | — |
| `style_instructions` | string | no | — | — | — |

## Routes

`"model": "gemini_3_8_flash_lite_tts"` picks a route automatically (priority order, then the inputs you send). To pin one, pass its key as `model`.

| model key | provider | modality | price from | typical time |
|---|---|---|---|---|
| `fal:google/gemini-3.8-flash-lite-tts` | fal | text-to-speech | $0.01 | ~6 s |

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Catalog version 2026-11-11T12:59:09.901887+00:00. All models: https://varg.ai/models/llms.txt