Speech model

Gemini 3.8 Flash TTS

Name: Gemini 3.8 Flash TTS
Brand: Google
SKU: google/gemini-3.8-flash-tts

google/gemini-3.8-flash-tts

google/gemini-3.8-flash-tts is a text-to-speech model from Google you can call on the OceanToken API.

Price card, similar models and questions answered: Gemini 3.8 Flash TTS on oceantoken.ai.

At a glance

Model ID	`google/gemini-3.8-flash-tts`
Type	Speech
Publisher	Google
Price	On oceantoken.ai
Endpoint	`/v1/audio/speech`
API shape	OpenAI-compatible
In the catalog since	2026-09-23

API

POST /v1/audio/speech. Base URL https://api.oceantoken.ai, your OceanToken key as the bearer token. The OpenAI SDKs work unchanged; see the Quickstart.

Download this spec (JSON) · llms.txt for AI assistants

Basic

curl
Python
JavaScript

curl https://api.oceantoken.ai/v1/audio/speech \
  -H "Authorization: Bearer $OCEANTOKEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-3.8-flash-tts",
  "input": "Welcome aboard.",
  "voice": "VOICE_NAME",
  "response_format": "mp3"
}' --output speech.mp3

import os
from openai import OpenAI

client = OpenAI(base_url="https://api.oceantoken.ai/v1", api_key=os.environ["OCEANTOKEN_API_KEY"])
audio = client.audio.speech.create(
    model="google/gemini-3.8-flash-tts",
    input="Welcome aboard.",
    voice="VOICE_NAME",
    response_format="mp3",
)
audio.write_to_file("speech.mp3")

import fs from 'node:fs';
import OpenAI from 'openai';

const client = new OpenAI({baseURL: 'https://api.oceantoken.ai/v1', apiKey: process.env.OCEANTOKEN_API_KEY});
const audio = await client.audio.speech.create({
  "model": "google/gemini-3.8-flash-tts",
  "input": "Welcome aboard.",
  "voice": "VOICE_NAME",
  "response_format": "mp3"
});
fs.writeFileSync('speech.mp3', Buffer.from(await audio.arrayBuffer()));

voice is required: replace VOICE_NAME with one of the voices this model's publisher documents. See Voices.

Request parameters

Only what this model takes. Anything else in the request is left out before it reaches the model.

Parameter	Type	Description
`model` required	string	This model's ID.
`input` required	string	The text to read.
`voice` required	string	One of this model's voices (see the Speech guide).
`response_format`	string mp3, wav, opus, aac, flac, pcm, url	Audio format; `url` returns a link instead of the audio.
`speed`	number 0.25 to 4 default `1`	Pace, on models that support it.
`instructions`	string	Tone notes such as "calm, slow", on models that support them.

Response

Field	Type	Description
`(body)`	binary	The audio file.

More examples and how errors and billing work: Speech and transcription.

Compared with similar models

Speech models on OceanToken in the same price range as google/gemini-3.8-flash-tts. Compare their prices on oceantoken.ai.

Model	Publisher	Context
Gemini 3.8 Flash TTS `google/gemini-3.8-flash-tts`	Google	—
Gemini 3.8 Flash Lite TTS `google/gemini-3.8-flash-lite-tts`	Google	—
Gemini 3.1 Flash TTS Preview `google/gemini-3.1-flash-tts-preview`	Google	—

Use it

Create an account Price on oceantoken.ai

The facts on this page were read from the live OceanToken catalog on 2026-11-05 (UTC), when the documentation was built. Prices are published on oceantoken.ai.