Cartesia · read on October 27, 2026
Cartesia Sonic 3
Cartesia Sonic 3 is a TTS (text-to-speech) model from Cartesia. No benchmark in this index times it over 30 days, so it has no speed tier. It ranks 62 of 86 in the full ranking.
- Speed tier
- No tier
- P95 / median
- Not timed / Not timed
- Listener Elo
- 1,054
- Price per 1M chars
- $49 to $50
Where it ranks
Full ranking: 62 of 86. Use case ranks, by speed:
The tier and the ranks are computed by this site from the benchmarks' figures, not declared by Cartesia.
Measurements and sources
Speko
| Naturalness score | 1,551 |
| Latency, board chart | 150 ms |
Artificial Analysis
| Listener Elo | 1,054 |
| Listener Elo, 95% interval | 11 |
| Listener Elo, customer service | 1,104 |
Details
| Provider | Cartesia |
| Access | Proprietary |
| Streaming | Described by the vendor's documentation: documentation |
| Languages tested | Spanish, German, French, Portuguese, Japanese, Chinese, Arabic, Hindi, Vietnamese |
| Measured by | Artificial Analysis, Speko |
| Official site | www.cartesia.ai |
Not collected
Nothing below is estimated. Each line says which measure is missing and why.
- Speed (Coval median time to first audio): not measured by Coval (reading of 2026-10-27, 30-day window)
- Speed (Coval P95 time to first audio): not measured by Coval (reading of 2026-10-27, 30-day window)
- Numbers and dates (Speko pronunciation score): listed by Speko without this value (reading of 2026-10-27)
Sources
- https://artificialanalysis.ai/text-to-speech/leaderboard/provider-voice (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 Cartesia Sonic 3.