Cartesia Ships Sonic-3.6: A Streaming TTS Model That Now Leads Both Artificial Analysis Speech Arenas

Summary

<p>Cartesia has released Sonic-3.6, a streaming text-to-speech model built on state space models rather than transformers. It now ranks #1 on both Artificial Analysis speech leaderboards — 1,283 Elo on Provider Voice and 1,123 on Controlled Voice, the board that clones every model onto the same eight reference voices to isolate the synthesis engine. Cartesia states sub-90ms time-to-first-audio. The model is available in beta on Cartesia's own API</p> <p>The post <a href="https://www.marktechpost.com/2026/08/18/cartesia-ships-sonic-3-6-a-streaming-tts-model-that-now-leads-both-artificial-analysis-speech-arenas/">Cartesia Ships Sonic-3.6: A Streaming TTS Model That Now Leads Both Artificial Analysis Speech Arenas</a> appeared first on <a href="https://www.marktechpost.com">MarkTechPost</a>.</p>