Google · voice model

Gemini 3.8 Flash TTS

Gemini 3.8 Flash TTS is Google's latest voice model in our dataset, released Sep 22, 2026. Proprietary, API access only. Google's flagship creative text-to-speech model, generally available since Sep 22, 2026. Verified against vendor sources on Oct 26, 2026.

Reported Last verified Oct 26, 2026 · All models · JSON · Markdown

ReleasedSep 22, 2026
LicenceProprietaryProprietary (API)

Innot verifiedOutAudio

Key facts

Gemini 3.8 Flash TTS: key facts with sources
Fact	Value	Source
Vendor	Google	n/a
Released	Sep 22, 2026	source
Status	generally available	n/a
API id	gemini-3.8-flash-tts	source
Output	audio	source
Licence	Proprietary (API)	source
Pricing	Text input $0.5; Audio output $9 (per 1M tokens) Listed price runs through Dec 31, 2026.	source

Where Gemini 3.8 Flash TTS sits in our data

Released Sep 22, 2026 (week 39 of 2026), in September 2026. Other models in our data released that month: GPT-6.1 Sol, Claude Sonnet 5.5, Claude Opus 5.5, Gemini 3.8 Flash-Lite TTS, GPT-6 Luna, GPT-6 Sol.
The previous Google model we track is Gemini 3.8 Live Extended Thinking (Sep 15, 2026), 7 days earlier.
Google tools we cover: Gemini Notebook, Google ADK, Gemini CLI.
All releases by date: AI model releases by month · new AI models this week.

How Gemini 3.8 Flash TTS differs from Gemini 3.8 Flash-Lite TTS

Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.

We have a recorded price for Gemini 3.8 Flash TTS but none for Gemini 3.8 Flash-Lite TTS.
Both were released on Sep 22, 2026.
Facts for the other model: Gemini 3.8 Flash-Lite TTS.

What we tested

Nothing yet. We have not run Gemini 3.8 Flash TTS ourselves, so every fact on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.

Not verified, left out

We could not confirm these on a vendor page, so we do not state them.

Input modalities were not captured from the model page.