Soniox · read on October 27, 2026
Soniox TTS RT v1
Soniox TTS RT v1 is a TTS (text-to-speech) model from Soniox. Coval measures its P95 time to first audio at 319 ms, which puts it in the Visible delay speed tier. It ranks 14 of 86 in the full ranking.
- Speed tier
- Visible delay
- P95 / median
- 319 ms / 258.3 ms
- Listener Elo
- Not rated
- Price per 1M chars
- $13 to $14.1
Where it ranks
Full ranking: 14 of 86. Artificial Analysis does not rate this model for a use case, and it is not among the fastest, so it appears on no use case page.
The tier and the ranks are computed by this site from the benchmarks' figures, not declared by Soniox.
Measurements and sources
Coval
| Median time to first audio (P50) | 258.3 ms |
| Time to first audio, P95 | 319 ms |
| Time to first audio, mean | 256.4 ms |
| Time to first audio, P90 | 307 ms |
| Timed requests | 2,372 |
Speko
| Naturalness score | 1,569 |
| Latency, model page sweep (median) | 362 ms |
| Numbers and dates pronunciation | 0.35 |
Details
| Provider | Soniox |
| Access | Proprietary |
| Streaming | A benchmark measures its time to first audio |
| Features listed by Coval | multilingual, voice-cloning |
| Languages tested | Spanish, German, French |
| Measured by | Coval, Speko |
| Official site | soniox.com |
Not collected
Nothing below is estimated. Each line says which measure is missing and why.
- Listener rating (Artificial Analysis Speech Arena Elo): not measured by Artificial Analysis (reading of 2026-10-27)
- Price (Artificial Analysis price per 1M characters): not measured by Artificial Analysis (reading of 2026-10-27)
Sources
- https://benchmarks-api-6wxgp27p2a-ue.a.run.app/v1/results/aggregates?benchmark=TTS&window=30d&include_series=false (read on October 27, 2026)
- https://benchmarks.speko.ai/tts/ (read on October 27, 2026)
Values are copied from these pages on the date shown. Vendor and model name agree in every source that lists it.
Compare it with the reference model: Gradium TTS vs Soniox TTS RT v1.