Cartesia ships Sonic 3.6 TTS topping both speech leaderboards
Scoring 1,283 Elo, Sonic 3.6 took #1 on both Artificial Analysis speech leaderboards (Provider Voice and Controlled Voice), beating Speechify's Simba 3.2 and Alibaba's Qwen-Audio-3.0-TTS-Plus. It ships about three months after Sonic 3.5, which holds #2 on the Controlled Voice board.
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