Gradium TTS Beta
Leader Proprietary · Gradium
76.8
/100
Gradium TTS Beta is a proprietary text-to-speech (TTS) API from Gradium, measured by two independent benchmarks: Coval and Speko.
Voice agents Coval Speko
Score tier
TTS APIs in the “Leader” tier
3 text-to-speech (TTS) models, ranked from the highest benchmark score to the lowest, out of 100.
Data checked on September 30, 2026 · updated after each benchmark capture
Alibaba Qwen3 TTS Fast
Leader Open weights · Alibaba (Qwen)
73.7
/100
Alibaba Qwen3 TTS Fast is an open-weights text-to-speech (TTS) API from Alibaba (Qwen), served by Nari Labs, measured by two independent benchmarks: Coval and Speko.
Voice agents Coval Speko
Soniox TTS Real-Time v2
Leader Proprietary · Soniox
73.7
/100
Soniox TTS Real-Time v2 is a proprietary text-to-speech (TTS) API from Soniox, measured by three independent benchmarks: Artificial Analysis, Coval and Speko.
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