Benchmark
26 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 27, 2026 · updated after each benchmark capture
Inworld Realtime TTS-2 Flash is a proprietary text-to-speech (TTS) API from Inworld, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Gradium TTS is a proprietary text-to-speech (TTS) API from Gradium, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Inworld Realtime TTS-2 is a proprietary text-to-speech (TTS) API from Inworld, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Fish Audio Drama 3 Preview is an open-weights text-to-speech (TTS) API from Fish Audio, measured by three independent benchmarks: Artificial Analysis, Cekura and Coval.
ElevenLabs Eleven v4 Turbo is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
ElevenLabs Flash v2.5 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Deepgram Flux TTS is a proprietary text-to-speech (TTS) API from Deepgram, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Soniox TTS Real-Time v2 is a proprietary text-to-speech (TTS) API from Soniox, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Rime Mist v3 is a proprietary text-to-speech (TTS) API from Rime, measured by three independent benchmarks: Cekura, Coval and Speko.
Cartesia Sonic 3.6 is a proprietary text-to-speech (TTS) API from Cartesia, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Cartesia Sonic 3.5 is a proprietary text-to-speech (TTS) API from Cartesia, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Rime Coda is a proprietary text-to-speech (TTS) API from Rime, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
SpaceXAI Grok TTS is a proprietary text-to-speech (TTS) API from xAI, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Deepgram Aura 2 is a proprietary text-to-speech (TTS) API from Deepgram, measured by three independent benchmarks: Cekura, Coval and Speko.
Fish Audio S2.1 Pro is a proprietary text-to-speech (TTS) API from Fish Audio, measured by four independent benchmarks: Artificial Analysis, Cekura, Coval and Speko.
Alibaba Qwen3 TTS is a proprietary text-to-speech (TTS) API from Alibaba (Qwen), measured by two independent benchmarks: Artificial Analysis and Cekura.
ElevenLabs Eleven v3 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by two independent benchmarks: Artificial Analysis and Cekura.
ElevenLabs Eleven v4 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by three independent benchmarks: Artificial Analysis, Cekura and Speko.
Google Gemini 3.1 Flash TTS is a proprietary text-to-speech (TTS) API from Google, measured by three independent benchmarks: Artificial Analysis, Cekura and Speko.
Google Gemini 3.8 Flash TTS is a proprietary text-to-speech (TTS) API from Google, measured by three independent benchmarks: Artificial Analysis, Cekura and Speko.
Google Gemini 3.8 Flash-Lite TTS is a proprietary text-to-speech (TTS) API from Google, measured by three independent benchmarks: Artificial Analysis, Cekura and Speko.
Hume AI Octave 2 is a proprietary text-to-speech (TTS) API from Hume AI, measured by three independent benchmarks: Artificial Analysis, Cekura and Speko.
Microsoft MAI-Voice-2.1 is a text-to-speech (TTS) API from Microsoft, measured by one independent benchmark, Cekura.
Microsoft MAI-Voice-2.1-Flash is a text-to-speech (TTS) API from Microsoft, measured by one independent benchmark, Cekura.
OpenAI GPT-4o mini TTS is a text-to-speech (TTS) API from OpenAI, measured by two independent benchmarks: Cekura and Speko.
Smallest.ai Lightning v3.1 is a proprietary text-to-speech (TTS) API from Smallest.ai, measured by three independent benchmarks: Artificial Analysis, Cekura and Speko.