Cartesia releases Sonic-3.6 with improved naturalness across 44 languages
iamaliveix · x · 2026-08-18
Cartesia has released Sonic-3.6, their latest TTS model, featuring a significant step change in naturalness across 44 languages, just three months after the Sonic-3.5 launch. The update includes fundamental model improvements based on developer feedback.
Sonic-3.6 currently ranks #1 on Artificial Analysis across both the provider and controlled voice streaming leaderboards, offering best-in-class voices and underlying model performance. The model is available in beta starting today.
Related event: Cartesia Releases Sonic-3.6, Topping Speech Leaderboards(4 posts)→
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