Listener Elo 956 ±14 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.
Microsoft VibeVoice 1.5B is an open-weights text-to-speech (TTS) API from Microsoft, 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 Microsoft VibeVoice 1.5B Fastest TTS APIs, by speed tierNeither Coval nor Speko measures Microsoft VibeVoice 1.5B's latency, so it has no speed tier and does not appear in the speed tiers.
In the Artificial Analysis Speech Arena it holds 956 ±14 Elo (95% interval), 83rd highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 82nd, at 980 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.
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