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Average Ratings 0 Ratings

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ease
features
design
support

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Description

Sonic is an advanced text-to-speech model designed specifically for real-time voice agents, featuring a natural delivery system with a response time of less than 90 milliseconds and supporting over 40 languages seamlessly. Its primary aim is to facilitate effortless voice interactions, characterized by a tone that adapts to various contexts, a steady pacing, and speech that aligns with the natural flow of conversation. Sonic automatically interprets the emotional nuances within transcripts, adjusting its delivery accordingly, and allows for the direct insertion of non-verbal cues like laughter into the spoken text. Faithful to the original transcripts, the model generates clear audio across different languages and voice options while effortlessly managing alphanumeric data, including order and phone numbers, email addresses, and IDs, without requiring any prior processing. Its context-aware pronunciation ensures that heteronyms are articulated correctly based on surrounding terms, and customizable pronunciation dictionaries empower teams to dictate how specific proper nouns and industry-related terminology should be pronounced. This comprehensive approach not only enhances the quality of interactions but also tailors the user experience to meet diverse communication needs.

Description

Gemini 3.8 Flash-Lite TTS is an expressive text-to-speech model from Google optimized for high-volume, cost-efficient speech generation. It is designed for workloads such as global dubbing, large-scale audio content production, localization, and conversational voice agents. Users can control characteristics such as tone, pacing, emphasis, and expressive nuance to shape how generated speech is delivered. Line-by-line direction allows scripts to include performance instructions and natural speech cues rather than producing uniformly spoken narration. The model supports long-form generation and is designed to preserve voice quality, natural pacing, and character consistency across extended audio. Native two-speaker staging allows developers and creators to generate multi-turn conversations while keeping speakers distinct and maintaining natural turn-taking. Scripted cues can introduce laughs, sighs, gasps, and listening responses such as “mhm” or “yeah” to make dialogue more conversational. Gemini 3.8 Flash-Lite TTS supports more than 100 languages and is designed for multilingual audio experiences at global scale, while generated Gemini Audio output includes SynthID watermarking for transparency. Developers can access the model through Google AI Studio and the Gemini API, with integration into Google Vids and planned API availability through Gemini Enterprise.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Gemini No 
Gemini 3.1 Flash-Lite No 
Gemini 3.1 Pro No 
Gemini Enterprise No 
Gemini Enterprise Agent Platform No 
Gemini Live API No 
Gemini Notebook No 
Google AI Studio No 
Google Vids No 
SynthID No 

Integrations

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

Pricing Details

$5 per month
Free Trial Yes 
Free Version Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Cartesia

Founded

2023

Country

United States

Website

www.cartesia.ai/sonic

Vendor Details

Company Name

Google

Founded

1998

Country

United States

Website

google.com

Product Features

Product Features

Text to Speech

API No 
Adjust Speaking Rate / Pitch No 
Audio Optimization No 
Custom Lexicons No 
Different Voice Choices No 
Multi-Language Support No 
Synchronize Speech No 

Alternatives

Alternatives