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What is Gemini 3.8 Flash TTS?

Gemini 3.8 Flash TTS is Google’s advanced text-to-speech model for generating expressive, customizable, and multilingual synthetic speech. The model is designed for creative voice direction, allowing users to generate original characters and vocal personas using natural-language instructions instead of relying only on preset voices. Voice characteristics can be customized by role, accent, timbre, pacing, delivery style, and other attributes across more than 100 languages and dialects. Google also provides a library of more than 2,000 production-ready voices for projects that do not require a newly generated vocal identity. Voice replication can recreate a consistent vocal profile from a short reference sample when the user has permission to use the voice, with built-in consent verification requirements. Creators can direct performances line by line with stage directions and cues for emotion, timing, whispers, pauses, laughs, sighs, gasps, and conversational reactions. Long-form generation is designed to preserve voice quality, pacing, and character identity across extended content such as audiobooks, podcasts, and narrated media. Native two-speaker scene staging allows a single script to produce natural multi-turn dialogue with distinct speakers and controlled conversational timing. These capabilities make Gemini 3.8 Flash TTS applicable to gaming, interactive characters, voice agents, media localization, dubbing, branded voices, podcasts, audiobooks, and other audio-production workflows. Google applies SynthID watermarking to generated audio and supports C2PA credentials and consent checks to improve transparency and protect voice owners. Gemini 3.8 Flash TTS is available through Google AI Studio and the Gemini API, with additional integrations and deployments across Google products, enterprise applications, and third-party developer platforms.

What is Gemini 2.5 Pro TTS?

Gemini 2.5 Pro TTS showcases Google's advanced text-to-speech technology as part of the Gemini 2.5 lineup, crafted to provide high-quality and expressive speech synthesis for structured audio creation. This model generates realistic voice output, featuring enhanced expressiveness, tone variations, pacing adjustments, and precise pronunciation, enabling developers to dictate style, accent, rhythm, and emotional nuances via text prompts. As a result, it is well-suited for numerous applications such as podcasts, audiobooks, customer service interactions, educational tutorials, and multimedia storytelling that require exceptional audio fidelity. Furthermore, it supports both single and multiple speakers, allowing for diverse voices and interactive conversations within a single audio track while offering speech synthesis in multiple languages without sacrificing stylistic coherence. Unlike quicker options like Flash TTS, the Pro TTS model prioritizes outstanding sound quality, rich expressiveness, and meticulous control over vocal attributes, thereby making it a favored selection among professionals aiming to elevate their audio projects. This commitment to detail not only enhances the listener's experience but also broadens the creative possibilities for audio content creators.

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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