Listener Elo 1,127 ±12 on Artificial Analysis (read October 22, 2026); latency not measured.
Benchmark summary: No speed tier: Coval, the source of the tiers, does not measure this model.
async Pro v1.0 is a proprietary text-to-speech (TTS) API from Async, measured by one independent benchmark, Artificial Analysis.
Speed tier
Not measured by Coval
No speed tier: Coval, the source of the tiers, does not measure this model.
Data read October 22, 2026. No combined score: methodology
Gradium TTS vs async Pro v1.0 Fastest TTS APIs, by speed tierNeither Coval nor Speko measures async Pro v1.0's latency, so it has no speed tier and does not appear in the speed tiers.
In the Artificial Analysis Speech Arena it holds 1,127 ±12 Elo (95% interval), 34th highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 38th, at 1,139 Elo.
Speko has not scored its pronunciation of numbers and dates.
Artificial Analysis lists $20.2. List prices, as each source prints them.
Alibaba Qwen-Audio-3.0-TTS-Plus is a proprietary text-to-speech (TTS) API from Alibaba (Qwen), measured by one independent benchmark, Artificial Analysis.
Alibaba Qwen-Audio-3.1-TTS-Plus is a proprietary text-to-speech (TTS) API from Alibaba (Qwen), measured by one independent benchmark, Artificial Analysis.
Alibaba Qwen3 TTS is a proprietary text-to-speech (TTS) API from Alibaba (Qwen), measured by one independent benchmark, Artificial Analysis.