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Key takeaways · AI-distilled
Artificial Analysis extended its Controlled Voice Arena to 9 new languages (Japanese, Mandarin, Hindi, Spanish, German, French, Portuguese, Vietnamese, Arabic), scored with natively written prompts and votes from first-language speakers.
Text-to-speech quality doesn't transfer reliably across languages: models that perform well in English don't necessarily match it on pronunciation, pacing, tone, and naturalness elsewhere.
Cartesia's Sonic family leads 8 of the 9 new leaderboards (Sonic 3.6 ranks #1 in 7 languages, Sonic 3.5 leads Portuguese), while Inworld's Realtime TTS-2 takes #1 in Mandarin at 1,185 Elo, ahead of Sonic 3.6 (1,146) and StepFun's StepAudio 2.5 TTS (1,130).
ElevenLabs' Eleven v3 family (Eleven v3 and Eleven v3 Conversational) places in the top 3 across 7 of the 9 new languages, showing consistency across languages rather than one strong market.
The rankings draw on more than 100,000 human preference votes across the 9 languages, with 15 to 24 public models ranked per language.
