Gemini 3.8 Flash TTS
Direct expressive narration with Gemini 3.8 Flash TTS — shape emotion, stage two speakers and localize audio in 130 languages from one prompt.
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A New Era for AI Narration: Gemini 3.8 Flash TTS Explained
Google's 2026 release splits its speech stack in two: a creative flagship for nuanced performance and a lean workhorse built for bulk audio.
- Two Models, Two Very Different JobsGemini 3.8 Flash TTS serves as the expressive flagship, while Flash-Lite TTS handles high-volume, cost-sensitive speech.
- Steer Every Line Instead of Choosing a Stock VoicePer-turn style notes, structured speech metadata and inline vocal cues control tone, tempo, feeling and accent.
- Build a Voice From Words — or Clone With ConsentDescribe the voice you want in plain language, or reproduce a real speaker using a reference clip paired with a matching consent recording.
Getting Clean Results From Gemini 3.8 Flash TTS
Four simple habits that keep your transcript tidy and let the performance metadata do the heavy lifting.
What Gemini 3.8 Flash TTS Can Do
From performance control to 130-language reach, here is a closer look at what the flagship model delivers.
Line-by-Line Performance Control
Per-turn styling plus inline laughs, sighs, coughs, breaths and pauses — closer to coaching a voice actor than picking a preset.
Describe a Voice in Plain English
Prompts can set age range, personality, accent, vocal texture and role, supported by 2,000+ production voices through the Voices endpoint.
Cloning That Requires Consent
A clean reference recording plus a matching consent recording from the same adult speaker, with SynthID watermarking and C2PA credentials.
Ready-Made Two-Speaker Scenes
Scripts define the exchange for podcasts, training dialogues, product demos and game scenes without manual line stitching.
Steady Voice Across Long Recordings
Google documents consistent identity, timbre, volume and room tone across multi-minute narration and extended dialogue.
130 Languages With Regional Accents
Gemini 3.8 Flash TTS covers 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 on pricing, model choice, benchmarks and safety rules for Gemini 3.8 Flash TTS.
What does Gemini 3.8 Flash TTS cost per audio minute?
Roughly 1.35 cents per audio minute at launch rates of $0.50 input and $9 output per million tokens.
When should I choose Flash TTS over Flash-Lite TTS?
Pick Flash TTS for acting nuance and long-form audio; choose Flash-Lite TTS for bulk output and low latency.
How does it stack up against rival voice models?
Google reports 71.4 on Hume's Voice Design Benchmark; Voice Arena places it second at 1,260 Elo.
What changed from the Gemini 3.1 Flash TTS Preview?
Flash-Lite TTS replaces the 3.1 preview, cutting audio output from $20 to $6 per million tokens.
Can I clone a voice, and which safeguards apply?
Replication needs a reference clip plus a matching consent recording from the same adult speaker.
Why does the model read my stage directions aloud?
Input is treated as a verbatim transcript, so move sustained directions into speech metadata.
Bring Your Own Script to Gemini 3.8 Flash TTS
Try both models in the Gemini API or Google AI Studio — moving between Gemini 3.8 Flash TTS and Flash-Lite TTS takes only a model identifier change. Weigh batch against priority inference before committing a production budget.