Language tested
18 text-to-speech (TTS) models, ordered speed first: by speed tier and P95 time to first audio on Coval, then the models Coval does not measure, by name. No combined score.
Data checked on October 22, 2026 · updated after each benchmark capture
18 of the 119 text-to-speech (TTS) models in this benchmark were tested in Vietnamese by Artificial Analysis (controlled-voice arena) or Speko (multilingual board). A model missing from this page was not tested in Vietnamese: that does not mean it cannot speak Vietnamese.
A model is listed here only when an independent benchmark measured its output in Vietnamese. The list is ordered speed first, on Coval's English latency measurements: no public source measures latency in Vietnamese. The model pages give every measurement and its date.
Boson AI Higgs Audio V3 TTS is an open-weights text-to-speech (TTS) API from Boson AI, measured by one independent benchmark, Artificial Analysis.
Cartesia Sonic 3 is a proprietary text-to-speech (TTS) API from Cartesia, measured by two independent benchmarks: Artificial Analysis and Speko.
Cartesia Sonic 3.5 is a proprietary text-to-speech (TTS) API from Cartesia, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Cartesia Sonic 3.6 is a proprietary text-to-speech (TTS) API from Cartesia, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
ElevenLabs Eleven v3 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by one independent benchmark, Artificial Analysis.
ElevenLabs Eleven v4 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by two independent benchmarks: Artificial Analysis and Speko.
ElevenLabs Eleven v4 Turbo is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
ElevenLabs Flash v2.5 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
ElevenLabs Turbo v2.5 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by two independent benchmarks: Artificial Analysis and Speko.
ElevenLabs Eleven v3 Conversational is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by two independent benchmarks: Artificial Analysis and Speko.
Fish Audio S2 Pro is an open-weights text-to-speech (TTS) API from Fish Audio, measured by one independent benchmark, Artificial Analysis.
Google Gemini 3.8 Flash-Lite TTS is a proprietary text-to-speech (TTS) API from Google, measured by two independent benchmarks: Artificial Analysis and Speko.
Google Gemini 3.8 Flash TTS is a proprietary text-to-speech (TTS) API from Google, measured by two independent benchmarks: Artificial Analysis and Speko.
Inworld Realtime TTS-2 is a proprietary text-to-speech (TTS) API from Inworld, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
Inworld Realtime TTS-2 Flash is a proprietary text-to-speech (TTS) API from Inworld, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
MiniMax Speech 2.8 HD is a proprietary text-to-speech (TTS) API from MiniMax, measured by two independent benchmarks: Artificial Analysis and Speko.
MiniMax Speech 2.8 Turbo is a proprietary text-to-speech (TTS) API from MiniMax, measured by two independent benchmarks: Artificial Analysis and Speko.
SpaceXAI Grok TTS is a proprietary text-to-speech (TTS) API from xAI, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.