Models
Gemini 3.1 Flash TTS Preview
Model id: gemini/models/gemini-3.1-flash-tts-preview
- Audio
Google’s preview text-to-speech. One or more speakers.
Best for
Gemini spoken output while the preview is current.
- Provider
- Google Gemini
- Context window
- 8,192
- Release date
- 2026-04-15
Pricing
Input
$1.5423 / 1M
Output
$30.8462 / 1M
Amounts in Canadian dollars, converted at the Bank of Canada indicative rate (2026-09-21).
Performance
Reading
Last 7 days
Not enough data to display the chart.
Activity
Tokens
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Top 5 tools · last 7 days
Not enough data to display tool activity.
Availability
Availability (%)
Last 7 days
- Operational probes
- 99.98% over 7 days
- Samples
- 9,205
Quick start
Turn text into speech with a tonia_ key and the exact model id below.
curl
curl https://pass.tonia.ca:8443/v1/interactions \
-H "Authorization: Bearer $TONIA_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gemini/models/gemini-3.1-flash-tts-preview",
"input": [
{
"type": "text",
"text": "Bonjour"
}
],
"stream": false
}'Python (tonia SDK)
import os
from tonia import Tonia
client = Tonia(api_key=os.environ["TONIA_API_KEY"])
response = client.interactions.create(
model="gemini/models/gemini-3.1-flash-tts-preview",
input=[{"type": "text", "text": "Bonjour"}],
stream=False,
)TypeScript (tonia SDK)
import { Tonia } from "@tonia-router/sdk";
const client = new Tonia({
apiKey: process.env.TONIA_API_KEY,
});
const response = await client.interactions.create({
model: "gemini/models/gemini-3.1-flash-tts-preview",
input: [{ type: "text", text: "Bonjour" }],
stream: false,
});Gemini speech and transcription models use /v1/interactions (not /v1/audio).