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Description
Gemini 3.8 Flash TTS is a generative text-to-speech model from Google designed for expressive voice creation, character design, dialogue direction, and multilingual audio production. Instead of limiting users to fixed voice presets, the model can create entirely new vocal identities from natural-language descriptions. Developers and creators can specify attributes such as accent, role, timbre, speaking style, pacing, and other voice characteristics across more than 100 languages and dialects. The model also offers access to more than 2,000 production-ready voices and supports voice replication from a short authorized audio sample. Performance controls allow users to direct individual lines with stage directions, pacing instructions, dialect shifts, emotional cues, and conversational backchanneling. Gemini 3.8 Flash TTS supports long-form generation while maintaining voice consistency, making it suitable for podcasts, audiobooks, localization, and other extended audio projects. Native two-speaker scene support lets users create multi-turn conversations from a single script while preserving distinct voices and natural turn-taking. Google includes consent verification, SynthID watermarking, and C2PA credentials to provide greater transparency and safeguards around generated and replicated voices. Gemini 3.8 Flash TTS can be used through Google AI Studio and the Gemini API and is intended for developers, creators, enterprises, media companies, and teams building expressive speech experiences.
Description
Grok Text to Speech (TTS) is an independent audio API designed to enable developers to quickly create natural and dynamic speech from written text. Utilizing the same technology that supports Grok Voice, Tesla automobiles, and Starlink client services, this API simplifies the integration of high-quality voice synthesis into various applications, including voice agents, accessibility solutions, podcasts, digital assistants, customer interaction platforms, and immersive audio products. Grok TTS provides the capability to convert lengthy text into spoken words via a REST API, or to produce speech instantly using a WebSocket API, offering developers the flexibility needed for both batch audio generation and real-time conversational applications. The API emphasizes expressive delivery rather than monotonous narration, allowing for refined control through user-friendly inline and wrapping speech tags. By incorporating tags, developers can infuse natural prosody and emotion into the speech output, resulting in a more lifelike delivery without the need for complicated markup. This makes Grok TTS an invaluable tool for enhancing user engagement and creating more interactive experiences.
API Access
Has API
API Access
Has API
Integrations
Gemini
Gemini 3.1 Flash-Lite
Gemini 3.1 Pro
Gemini 3.5 Pro
Gemini Enterprise
Gemini Enterprise Agent Platform
Gemini Live API
Gemini Notebook
Google AI Studio
Google Vids
Integrations
Gemini
Gemini 3.1 Flash-Lite
Gemini 3.1 Pro
Gemini 3.5 Pro
Gemini Enterprise
Gemini Enterprise Agent Platform
Gemini Live API
Gemini Notebook
Google AI Studio
Google Vids
Pricing Details
No price information available.
Free Trial
Free Version
Pricing Details
No price information available.
Free Trial
Free Version
Deployment
Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook
Deployment
Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook
Customer Support
Business Hours
Live Rep (24/7)
Online Support
Customer Support
Business Hours
Live Rep (24/7)
Online Support
Types of Training
Training Docs
Webinars
Live Training (Online)
In Person
Types of Training
Training Docs
Webinars
Live Training (Online)
In Person
Vendor Details
Company Name
Founded
1998
Country
United States
Website
google.com
Vendor Details
Company Name
SpaceXAI
Founded
2023
Country
United States
Website
x.ai/news/grok-stt-and-tts-apis
Product Features
Text to Speech
API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech