18 August 2026

Cartesia releases multilingual text-to-speech model Sonic

Cartesia, a voice AI startup, released Sonic-3.6 in beta testing, converting written text into spoken audio.
The model handles 44 languages, expanding beyond English-only systems that dominate the market.
Sonic-3.6 ranked highest on industry benchmarks measuring text-to-speech quality, though real-world performance differences remain unclear.

How it was covered

Voice AI startup Cartesia released Sonic-3.6 in beta, a text-to-speech model supporting 44 languages that tops industry voice leaderboards.