Speech Arena Elo 1,129 on Artificial Analysis, latency not measured; ranked 52nd (tied) of 112 in the TTS for Voice Agents 2026 index.
Benchmark summary: 8.5/100, ranked 52nd (tied) of 112 in the TTS for Voice Agents 2026 index (Listed). Strongest criterion: voice quality, 7.3 of 20 points.
Microsoft Azure HD 2.5 is a proprietary text-to-speech (TTS) API from Microsoft, measured by one independent benchmark, Artificial Analysis.
Overall score
8.5 /100
Data checked on September 30, 2026
Updated after each benchmark capture
Every point comes from a public benchmark: sources · methodology
Microsoft Azure HD 2.5 ranks 52nd of 112 in the 2026 text-to-speech (TTS) API benchmark, with a score of 8.5/100.
Neither Coval nor Speko measures Microsoft Azure HD 2.5's latency, so it scores 0 of 60 on real-time speed and does not appear in the real-time ranking.
No accuracy measurement: Coval does not measure its word error rate and Speko does not rate its pronunciation robustness, so accuracy counts 0 of 15.
In the Artificial Analysis Speech Arena (capture of October 1, 2026), Microsoft Azure HD 2.5 has an Elo of 1,129 (±12, 95% confidence) from 2,508 blind comparisons, 26th highest of the 92 models Artificial Analysis rates.
Artificial Analysis lists Microsoft Azure HD 2.5 at $22 per 1M characters (40th lowest of the 78 models Artificial Analysis lists a price for).
Artificial Analysis changed its Speech Arena Elo between the captures of September 30, 2026 and October 1, 2026 without a new measurement date (1,128, then 1,129): the score uses the average, 1,128.5. The value shown is the latest.
ElevenLabs Eleven v3 is a proprietary text-to-speech (TTS) API from ElevenLabs, measured by one independent benchmark, Artificial Analysis.
Fish Audio S2 Pro is an open-weights text-to-speech (TTS) API from Fish Audio, measured by one independent benchmark, Artificial Analysis.
MiniMax Speech 2.6 Turbo is a proprietary text-to-speech (TTS) API from MiniMax, measured by two independent benchmarks: Artificial Analysis and Speko.