Gemini 3.8 Flash TTS
Type a script, and Gemini 3.8 Flash TTS performs it — pick voices, moods and languages, then export studio-ready audio in minutes.
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How Gemini 3.8 Flash TTS Reinvents Studio-Quality Narration
Launched September 23, 2026, Google's lineup pairs a creative flagship model with a lean, high-throughput tier built for bulk audio work.
- One Release, Two Very Different JobsThe creative flagship of the pair is Gemini 3.8 Flash TTS, while Flash-Lite TTS handles cheaper, high-volume speech at scale.
- Steer the Read, Don't Settle for PresetsPer-turn styling, structured speech metadata and inline vocal tags give you control over emotion, tempo and accent as the line unfolds.
- Design Voices by Text, Replicate Only with ConsentDescribe the voice you want in plain words, or reproduce a real speaker using a reference clip alongside a matching consent recording.
Four Rules for Prompting Gemini 3.8 Flash TTS
Follow these four habits to keep your transcript clean and let the performance metadata do the acting.
What Gemini 3.8 Flash TTS Can Actually Do
Voice direction, cloning safeguards and 130-language reach — a closer look at what the flagship Gemini TTS engine delivers.
Line-by-Line Performance Control
Per-turn styling plus inline laughs, sighs, coughs, breaths and pauses — closer to coaching a voice actor than clicking a preset.
Describe a Voice, Get That Voice
Prompts can spell out age range, personality, accent, vocal texture and role, backed by 2,000+ production voices through the Voices endpoint.
Cloning Gated Behind Consent
A clean reference recording plus a matching consent recording from the same adult speaker, with SynthID watermarking and C2PA credentials attached.
Two-Speaker Scenes Built In
Scripts carry the whole conversation for podcasts, teaching dialogues, product walkthroughs and game scenes — no manual line stitching required.
Steady Voice Across Long Recordings
Google documents stable identity, timbre, volume and room tone across multi-minute narration and extended back-and-forth dialogue.
130 Languages, Accents Included
Flash TTS reaches 130 languages versus Flash-Lite's 101, with regional accents, minority dialects and IPA pronunciation overrides.
Gemini 3.8 Flash TTS: Your Questions Answered
Quick answers about pricing, picking a model tier, benchmark scores and the safety rules behind Gemini 3.8 Flash TTS.
What does Gemini 3.8 Flash TTS charge per audio minute?
At launch rates of $0.50 per million input tokens and $9 per million output tokens, roughly 1.35 cents per minute of finished audio.
Which tier should I pick — Flash TTS or Flash-Lite TTS?
Choose Flash TTS when acting nuance and long-form narration matter most; reach for Flash-Lite TTS for high-volume output and lower latency.
How does it stack up against rival voice models?
Google cites 71.4 on Hume's Voice Design Benchmark, and Voice Arena ranks the model second overall with 1,260 Elo.
What changed from the Gemini 3.1 Flash TTS Preview?
Flash-Lite TTS takes over from the 3.1 preview and cuts audio output pricing from $20 down to $6 per million tokens.
Can I clone a voice, and what safeguards apply?
Yes, but replication requires a reference clip plus a matching consent recording supplied by the same adult speaker.
Why does the model read my stage directions aloud?
The engine treats your input as a verbatim transcript, so move any sustained directions into the speech metadata instead.
Hear Gemini 3.8 Flash TTS Read Your Own Script
Try both tiers inside the Gemini API or Google AI Studio — moving between Gemini 3.8 Flash TTS and Flash-Lite TTS takes nothing more than a model ID swap. Test batch and priority inference before you lock in a production budget.