Gemini 3.8 Flash Lite TTS
Gemini 3.8 Flash Lite TTS is the high-volume, lower-cost tier of Google's Gemini 3.8 text-to-speech models, announced with Flash TTS on 23 September 2026 for dubbing, read-aloud and voice agents. Google's model page says it was built to replace the 3.1 Flash TTS preview and lists 101 languages. On fal it takes the same request as Flash: 30 prebuilt voices, style instructions, inline vocal events and two-speaker dialogue. It costs $0.03 per thousand characters on fal, two thirds of Flash, and $6 per million audio tokens on the Gemini API through 31 December 2026, $12 after.
Anvisha Pai, Co-founder & CEO, Voyager
Google DeepMind · released
›What we asked for
Hi, I'm Gemini 3.8 Flash Lite TTS, the lighter and cheaper of Google's new voice models. Today I'm reading the script as written, with no directions. Here is the same script every voice on this site reads, so you can compare us.
google/gemini-3.8-flash-lite-tts
voice: Kore
returned 16.0 seconds of wav
At a glance
- Price
- $0.03 per thousand characters on fal, two thirds of Flash; our four scripts cost about three cents.
- Voices
- Thirty prebuilt voices on fal, Kore by default, which we used; Google's API adds its voice library and replication.
- Direction
- The same style_instructions, vocal events and two-speaker dialogue as Flash; we sent none.
- Languages
- 101 on Google's model page, against more than 130 for Flash.
Other Gemini TTS models: Gemini 3.8 Flash TTS, Gemini 3.1 Flash TTS. Compare all 3.
Anvisha's take
We have not scored the four readings by ear; press play and judge the voice yourself. What we measured: Flash Lite read the four scripts in 15 to 25 seconds of audio each for three cents across all four, the cheapest Gemini voice on the site. It was the quickest Gemini to return on three scripts, four to six seconds, but its first request of the run took ten. Its readings ran longer than Flash's on three scripts out of four, by up to two and a half seconds on the narration paragraph. It ran with Kore and no style instructions, like the other Gemini pages.
Gemini 3.8 Flash Lite TTS real output: the same 4 scripts every model gets
Every voice model on this site gets the same 4 scripts, so you can compare like with like. These are the readings Gemini 3.8 Flash Lite TTS returned, one try each, nothing re-rolled or retouched. Generated on . The 4 readings took 4 to 10 seconds each and cost $0.0292 in total.
Pacing, warmth and whether the pauses land where a voice actor would put them.
›What we asked for
Meet the Ember mug. It keeps your coffee at exactly the temperature you choose, for up to ninety minutes, and it tells your phone when it's ready. Warm from the first sip to the last. Ember. Coffee, on your terms.
google/gemini-3.8-flash-lite-tts
voice: Kore
returned 15.3 seconds of wav
Steady narration over a long paragraph, clean list rhythm and a natural close.
›What we asked for
A pour-over works in four steps. First, rinse the paper filter with hot water so it doesn't taste of paper. Second, add the grounds and pour just enough water to wet them, then wait thirty seconds while they bloom. Third, pour the rest of the water in slow circles. Fourth, wait about three minutes for it to drip through. That's it: a cup that tastes like the coffee, not the machine.
google/gemini-3.8-flash-lite-tts
voice: Kore
returned 25.1 seconds of wav
Range: excitement, then a hushed aside, from the words alone with no tags.
›What we asked for
We did it! We actually did it! I can't believe it's finally over. Okay. Okay, deep breath. Let's not tell anyone until Monday, alright? Just... let me have this one quiet night.
google/gemini-3.8-flash-lite-tts
voice: Kore
returned 16.0 seconds of wav
Reading numbers, times, currency, an email address and two hard names correctly.
›What we asked for
Your order ships on the 24th of September 2026 and arrives by 9:15 a.m. The total is $1,249.99, including VAT. Questions? Ask for Siobhan Nguyen or Ravi Parikh on 0800 555 0199, or email help@moda.app.
google/gemini-3.8-flash-lite-tts
voice: Kore
returned 24.6 seconds of wav
How the cost under each picture was worked out: fal's Gemini 3.8 Flash Lite TTS rate of $0.03 per 1,000 characters (fal model page and pricing API, read 2026-10-22) for the 213 characters sent; fal does not return the charge.
Compare Gemini 3.8 Flash Lite TTS
Gemini 3.8 Flash Lite TTS pricing
| Where | Unit | Price | Source |
|---|---|---|---|
| fal | 1,000 characters Billed on the spoken text; style instructions and speaker names are free. | $0.03 | fal model page and pricing API, read |
| Gemini API | Million audio output tokens Through 31 December 2026, then $12. Text in is $0.50 per million, then $1. Audio is 25 tokens a second. | $6.00 | Gemini API pricing, read |
Is Gemini 3.8 Flash Lite TTS free?
Google's pricing page lists Flash Lite TTS as free of charge on the Gemini API's rate-limited free tier, and Google says it powers Google Vids for everyone. fal charges per character.
- •Gemini API free tier: input and output free of charge.
- •Gemini API paid tier: $6 per million audio tokens through 31 December 2026.
- •fal: $0.03 per thousand characters.
Gemini API pricing, read
Where to use Gemini 3.8 Flash Lite TTS
- Gemini API · Model id gemini-3.8-flash-lite-tts.
- Google Vids · Where Google says the model reaches everyone.
- fal · $0.03 per thousand characters, 30 voices, WAV out.
- Voyager · Runs inside Voyager, the agent for creative work, with your own fal key.
Voyager
Run Gemini 3.8 Flash Lite TTS inside Voyager
Voyager is an agent for creative work that runs every model in this reference, Gemini 3.8 Flash Lite TTS included. Brief it, and it picks the model, makes the thing and hands back something you can edit. Create an account to get started.
What we noticed running Gemini 3.8 Flash Lite TTS
- •The first request of the run took 10.3 seconds; the other three returned in four to six. See the ad read reading.
- •25.1 seconds for the paragraph, two and a half seconds longer than Gemini 3.8 Flash on the same voice. See the explainer paragraph reading.
- •Came back exactly 16.00 seconds long, as did the self-introduction; the files differ. See the emotional line reading.
Gemini 3.8 Flash Lite TTS limits and API parameters
| Limit | Value |
|---|---|
| Input | 8,192 tokens for the whole request. Gemini API model page, read |
| Output format on fal | WAV only; ours came back as 24 kHz mono. fal API reference, read |
| Cloning on fal | None; the 30 prebuilt voices only. fal API reference, read |
›Every setting, for developers
fal (google/gemini-3.8-flash-lite-tts)
fal API reference, read
| Parameter | Type | Values | Default |
|---|---|---|---|
| prompt | string | The verbatim script, with optional vocal events like <laugh> or <sigh> Required for one speaker; omit it for dialogue. | |
| voice | enum | 30 voices including Kore, Puck, Charon, Zephyr, Aoede | Kore |
| style_instructions | string | Plain-language delivery, for example 'cheerful and friendly' Not billed. | |
| speakers | list | Exactly two speaker aliases, each with a voice | |
| turns | list | Ordered dialogue turns: speaker, text and an optional per-turn style | |
| enable_safety_checker | boolean | true, false Only authorised callers may turn it off. | true |
What Gemini 3.8 Flash Lite TTS will not say
Google's Generative AI Prohibited Use Policy applies: no impersonation of a real person meant to mislead, no fraud or scams, no harassment, no sexual content involving minors. Google says every clip from its Gemini audio models carries a SynthID watermark. Voice replication, on Google's own API and not through fal, needs a consent recording from the voice's owner.
Alternatives to Gemini 3.8 Flash Lite TTS
Frequently asked questions
What is Gemini 3.8 Flash Lite TTS?
The lower-cost tier of Google's Gemini 3.8 text-to-speech models, announced on 23 September 2026 for dubbing, read-aloud and voice agents, with the same controls as Flash and 101 languages.
How is Flash Lite different from Flash?
It is cheaper, $0.03 against $0.045 per thousand characters on fal, and Google lists 101 languages for it against more than 130 for Flash. On fal both take the same request.
How much does it cost on the Gemini API?
$6 per million audio tokens and $0.50 per million text tokens through 31 December 2026, then $12 and $1. Read on 22 October 2026.
How this page is made
Prices, limits and settings are read from the linked vendor and host pages on the dates shown. Every picture was generated by us through fal with the request shown under it, and the original files are kept unedited. A generation that failed is shown as a failure. Model and vendor names are used to identify the products; no vendor imagery appears on this page.
