Gemini 3.8 Flash TTS API
Gemini 3.8 Flash TTS text to speech — the creative tier of Gemini 3.8 TTS, 30 voices, billed on input length.
Google's successor to Gemini 3.1 Flash TTS and the creative tier of the Gemini 3.8 TTS family. 30 named voices, returns raw 24 kHz PCM.
No credit card required. Takes 30 seconds.
Gemini 3.8 Flash TTS API pricing
Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.
| Billing | Price |
|---|---|
| Rate | $0.0527/1K chars |
| What it costs | Per job |
|---|---|
| Short reply200 characters | $0.011 |
| Blog post narration10,000 characters (~1,600 words) | $0.527 |
| Audiobook chapter100,000 characters | $5.27 |
2,400+
Developers
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API calls served
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Endpoints
$0.01
Per call
Yep, that's it.
Playground coming soon — use the API endpoint directly with your API key.
Gemini 3.8 Flash TTS specs
| Provider | |
|---|---|
| Model ID | google/gemini-3.8-flash-tts |
| Endpoint | /v1/media/queue |
| Type | Text to Speech |
| Output formats | pcm |
| Voices | 30 presets (default Zephyr) |
How to get a Gemini 3.8 Flash TTS API key
- 1
Create a free account
Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.
- 2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
- 3
Call Gemini 3.8 Flash TTS
Send a request to /v1/media/queue with the x-api-key header and model "google/gemini-3.8-flash-tts".
- 4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.
Strengths
The next generation of Google's Flash speech model.
The creative member of the Gemini 3.8 TTS family, alongside the faster Flash Lite.
The full Gemini voice catalogue, from Zephyr and Puck to Sulafat.
Returns headerless raw PCM rather than MP3, which suits real-time streaming pipelines.
Quick start
Copy this snippet and start making calls with Gemini 3.8 Flash TTS.
// Step 1: Submit job
const res = await fetch('https://api.yepapi.com/v1/media/queue', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "google/gemini-3.8-flash-tts",
"prompt": "Once upon a time, in a city built entirely of glass, there lived a clockmaker who could hear the future ticking.",
"options": {
"voice": "Zephyr"
}
}),
});
const { data } = await res.json();
const jobId = data.jobId;
// Step 2: Poll for result
const status = await fetch(`https://api.yepapi.com/v1/media/status/${jobId}`, {
headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status: "pending" | "processing" | "completed" | "failed"
// job.result: { text?, image?, audio?, video? }Gemini 3.8 Flash TTS vs similar models
Every model below runs on the same API key — switch by changing the model ID.
| Model | Provider | Price |
|---|---|---|
| Gemini 3.8 Flash TTS | $0.0527/1K chars | |
| Gemini 3.8 Flash Lite TTS | $0.0359/1K chars | |
| Gemini 3.1 Flash TTS | $0.2005/1K chars | |
| Kokoro 82M | hexgrad | $0.0014/1K chars |
| Fish Audio Drama 3 | Fish Audio | $0.0042/1K chars |
| HeyGen Voice Turbo | HeyGen | $0.0084/1K chars |
| Sesame CSM 1B | Sesame | $0.0148/1K chars |
| Voxtral TTS 3 | Mistral | $0.0302/1K chars |
Why use Gemini 3.8 Flash TTS through YepAPI?
Gemini 3.8 Flash TTS API — Google's creative speech tier
Gemini 3.8 Flash TTS is a text-to-speech model from Google and the successor to Gemini 3.1 Flash TTS. It is the creative tier of the Gemini 3.8 TTS family and ships with 30 named voices.
It returns raw 24 kHz PCM rather than MP3, which suits real-time streaming but means you wrap it yourself for file playback. Billed at $0.0527 per 1,000 characters on YepAPI.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Google's successor to Gemini 3.1 Flash TTS and the creative tier of the Gemini 3.8 TTS family. 30 named voices, returns raw 24 kHz PCM.
Gemini 3.8 Flash TTS costs $0.0527/1K chars through YepAPI, billed per request with no monthly fee. For example, a short reply (200 characters) costs about $0.011.
Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for Gemini 3.8 Flash TTS and every other model — no separate Google account or waitlist.
New YepAPI accounts in most countries get free signup credit, enough to test Gemini 3.8 Flash TTS without a card. After that you pay per request at the rates above — there is no subscription.
Use "google/gemini-3.8-flash-tts" as the model on /v1/media/queue. The short alias "gemini-3-8-tts" also works.
Ready to use Gemini 3.8 Flash TTS?
$5 free credit on signup. No credit card required. Pay per call.
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- Qwen-Audio 3.0 TTS Plus API · Qwen
- Deepgram Aura-2 API · Deepgram
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