From the source
Cartesia released Sonic, a low-latency voice model that generates lifelike speech with a latency of 135ms, and includes a web playground and API.
From the source
From the source

Cartesia released Sonic, a low-latency voice model that generates lifelike speech with a latency of 135ms, and includes a web playground and API.
From the source
We’re releasing Sonic, our low-latency voice model that generates lifelike speech today. Sonic creates high quality lifelike speech for any voice with a model latency of 135ms—the fastest for a model of this class.
cartesia.ai