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About

Cartesia Sonic-3 is a real-time, streaming text-to-speech (TTS) model designed to generate ultra-realistic, expressive voice output with extremely low latency, enabling AI systems to speak as fluidly as humans in live interactions. Built on advanced state space model architecture, Sonic delivers high-quality speech while achieving near-instant response times, with audio generation beginning in as little as 40–100 milliseconds, making conversations feel seamless rather than delayed. It is optimized for conversational AI use cases, acting as the “voice layer” for AI agents by converting text into natural-sounding speech that includes emotional nuance such as excitement, empathy, or even laughter. It supports more than 40 languages with native-level voices and accent localization, allowing developers to build globally accessible applications with consistent quality across regions.

About

Gemini 2.5 Pro TTS is Google’s advanced text-to-speech model in the Gemini 2.5 family, optimized for high-quality, expressive, controllable speech synthesis for structured and professional audio generation tasks. The model delivers natural-sounding voice output with enhanced expressivity, tone control, pacing, and pronunciation fidelity, enabling developers to dictate style, accent, rhythm, and emotional nuance through text-based prompts, making it suitable for applications like podcasts, audiobooks, customer assistance, tutorials, and multimedia narration that require premium audio output. It supports both single-speaker and multi-speaker audio, allowing distinct voices and conversational flows in the same output, and can synthesize speech across multiple languages with consistent style adherence. Compared with lower-latency variants like Flash TTS, the Pro TTS model prioritizes sound quality, depth of expression, and nuanced control.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers building real-time voice AI applications who need ultra-fast, human-like text-to-speech for conversational systems and interactive experiences

Audience

Creators who need text-to-speech audio generation for podcasts, audiobooks, voice assistants, and other premium voice applications

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$4 per month
Free Version
Free Trial

Pricing

No information available.
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Cartesia
Founded: 2023
United States
cartesia.ai/sonic

Company Information

Google
Founded: 1998
United States
blog.google/technology/developers/gemini-2-5-text-to-speech/

Alternatives

Alternatives

Qwen3-TTS

Qwen3-TTS

Alibaba
Fish Audio

Fish Audio

Hanabi AI
Voxtral TTS

Voxtral TTS

Mistral AI
Voxtral TTS

Voxtral TTS

Mistral AI

Categories

Categories

Integrations

Gemini
Gemini 2.5 Flash
Gemini 2.5 Pro
Gemini Enterprise Agent Platform
Google AI Studio

Integrations

Gemini
Gemini 2.5 Flash
Gemini 2.5 Pro
Gemini Enterprise Agent Platform
Google AI Studio
Claim Cartesia Sonic-3 and update features and information
Claim Cartesia Sonic-3 and update features and information
Claim Gemini 2.5 Pro TTS and update features and information
Claim Gemini 2.5 Pro TTS and update features and information