589 ms time to first audio on Speko's board (read October 22, 2026); not measured by Coval, so no speed tier.
Benchmark summary: No speed tier: Coval, the source of the tiers, does not measure this model.
Hume AI Octave TTS is a proprietary text-to-speech (TTS) API from Hume AI, measured by two independent benchmarks: Artificial Analysis and Speko.
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 Hume AI Octave TTS Fastest TTS APIs, by speed tierSpeko's board plots it at 589 ms time to first audio from US East.
Speko rates its naturalness at 1,455 Elo from blind A/B votes on phone-agent lines (30th highest of the 43 models Speko rates). In the Artificial Analysis Speech Arena it holds 1,038 ±11 Elo (95% interval), 71st highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 59th, at 1,087 Elo.
Speko has not scored its pronunciation of numbers and dates.
Artificial Analysis lists $87.5. Speko lists about $100. List prices, as each source prints them: a range of $87.5 to $100.
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