Listener Elo 1,099 ±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.
StepFun Step Audio EditX (Mar 2026) is an open-weights text-to-speech (TTS) API from StepFun, 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 StepFun Step Audio EditX (Mar 2026) Fastest TTS APIs, by speed tierNeither Coval nor Speko measures StepFun Step Audio EditX (Mar 2026)'s latency, so it has no speed tier and does not appear in the speed tiers.
In the Artificial Analysis Speech Arena it holds 1,099 ±12 Elo (95% interval), 41st highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 61st, at 1,085 Elo.
Speko has not scored its pronunciation of numbers and dates.
No list price is published by Coval, Speko or Artificial Analysis for this model.
Alibaba Qwen3 TTS 1.7b is an open-weights text-to-speech (TTS) API from Alibaba (Qwen), served by Baseten, measured by one independent benchmark, Coval.
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.
Ant Group Ming-3.0-TTS is an open-weights text-to-speech (TTS) API from Ant Group, measured by one independent benchmark, Artificial Analysis.