Cartesia takes top spots for real-time speech and listening
Cartesia just launched Sonic-3.5 for text-to-speech and Ink-2 for live transcription, both topping Artificial Analysis's streaming leaderboards. Built on state space models rather than standard transformers, the duo pushes latency below 300ms with built-in turn detection. That finally eliminates the awkward pauses in real-time voice agents.