Cartesia Sonic

Sonic is a blazing fast, lifelike generative voice API (🚀 135ms model latency). Build high quality, real time voice experiences with a diverse voice library, instant voice cloning, voice mixing, and voice design with speed and emotion control.

Cartesia Sonic offers the fastest, ultra-realistic generative voice API, enabling high-quality, real-time voice experiences. With two powerful models—Sonic 2.0 and Sonic Turbo—it delivers lifelike speech with minimal latency (90ms and 40ms, respectively). The platform supports 15 languages, instant voice cloning, and fine-tuned emotion control, making it ideal for creating authentic, human-like conversational agents. Sonic excels in handling complex transcripts, including names, emails, and addresses, ensuring accuracy and naturalness. Trusted by leading companies, it enhances customer interactions, improves AI agent performance, and supports diverse applications like call centers and sales. Cartesia Sonic is revolutionizing voice AI with speed, reliability, and unparalleled expressiveness.