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What is Gemini 3.8 Flash-Lite TTS?

Gemini 3.8 Flash-Lite TTS is Google’s efficiency-focused text-to-speech model for generating expressive audio at high volume. It is positioned for applications where scalability and cost efficiency are important, including dubbing, localization, automated content production, and conversational voice systems. The model gives users detailed control over speech characteristics such as tone, pacing, delivery, and expressive nuance. Creators and developers can direct individual lines using script instructions to produce performances ranging from straightforward narration to more expressive dialogue. Long-form generation is designed to maintain natural pacing, audio quality, and stable speaker characteristics over extended recordings such as podcasts and other continuous content. Gemini 3.8 Flash-Lite TTS also supports native two-speaker scene staging, allowing a single script to generate structured conversations with distinct speakers and natural turn-taking. Nonverbal performance cues including laughs, sighs, gasps, and conversational backchanneling can be incorporated to add realistic texture to generated speech. With support for more than 100 languages, the model can be used to create multilingual audio experiences and localized content for audiences across different regions. Google reports that Gemini 3.8 Flash-Lite TTS performs strongly in human preference evaluations across languages including Japanese, Brazilian Portuguese, Vietnamese, Modern Standard Arabic, Mexican Spanish, and Hindi. Generated audio from Gemini Audio models includes SynthID watermarking, providing an imperceptible signal that can help identify AI-generated speech. Gemini 3.8 Flash-Lite TTS is available through Google AI Studio and the Gemini API, is integrated into Google Vids, and is planned for enterprise API access through Gemini Enterprise.

What is Gemini 2.5 Flash TTS?

The Gemini 2.5 Flash TTS model marks a significant leap forward in Google's Gemini 2.5 lineup, prioritizing fast, low-latency speech synthesis that yields expressive and highly controllable audio outputs. This model showcases remarkable enhancements in tonal diversity and expressiveness, empowering developers to generate speech that better reflects style prompts for various contexts, including storytelling and character representation, thus facilitating a more genuine emotional resonance. Its precision pacing function enables it to modify speech speed according to the context, allowing for rapid delivery in certain segments while decelerating for emphasis when necessary, all in adherence to specific directives. Furthermore, it supports multi-speaker dialogues with consistent character voices, making it ideal for diverse applications such as podcasts, interviews, and conversational agents, while also boosting multilingual functionality to preserve each speaker's unique tone and style across different languages. Designed for minimal latency, Gemini 2.5 Flash TTS is particularly adept for interactive applications and real-time voice interfaces, providing an effortless user experience. This groundbreaking model is poised to transform the way developers integrate voice technology into their work, paving the way for more immersive and engaging audio interactions. As the demand for advanced speech synthesis continues to grow, the Gemini 2.5 Flash TTS model stands at the forefront, ready to meet evolving industry needs.

Media

Media

Integrations Supported

Gemini
Gemini Enterprise Agent Platform
Google AI Studio
Gemini 2.5 Flash
Gemini 2.5 Pro
Gemini 3.1 Flash-Lite
Gemini 3.1 Pro
Gemini 3.5 Pro
Gemini Enterprise
Gemini Live API
Gemini Notebook
Google Vids
SynthID

Integrations Supported

Gemini
Gemini Enterprise Agent Platform
Google AI Studio
Gemini 2.5 Flash
Gemini 2.5 Pro
Gemini 3.1 Flash-Lite
Gemini 3.1 Pro
Gemini 3.5 Pro
Gemini Enterprise
Gemini Live API
Gemini Notebook
Google Vids
SynthID

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Google

Date Founded

1998

Company Location

United States

Company Website

google.com

Company Facts

Organization Name

Google

Date Founded

1998

Company Location

United States

Company Website

blog.google/technology/developers/gemini-2-5-text-to-speech/

Categories and Features

Text to Speech

API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech

Categories and Features

Text to Speech

API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech

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