Sonic 3.5 measured on 2 of 3 Text to speech benchmarks2
BenchmarkByScoreRank
No benchmark matches
$49per 1M characters
1,192arena Elo
May 2026released
en, es, fr +38Languages
Exact native tariff; see source for billing scope.Price covers
Ranking?
Full ranking →···
17Luna TTS1,204.618Sonic 3.51,191.819Ming 3.0 TTS1,191.5Strong at
Alternatives?
ModelScoreCostPriceWhat changes
CheaperEleven v4 Turbowins 69%-18%$40SBetterSimba 3.2wins 58%-87%$6.58Languages: loses es, fr, de +37
OpenFish Audio Drama 3 Previewwins 58%-69%$15
CheaperQwen Audio 3.1 TTS Pluswins 66%-61%$19.31Languages: loses es, ru, ar +28ICheaperRealtime TTS-2wins 61%-29%$35ModelScoreCostPriceWhat changes
Eleven v4 Turbowins 69%-18%$40Qwen Audio 3.1 TTS Pluswins 66%-61%$19.31Languages: loses es, ru, ar +28IRealtime TTS-2wins 61%-29%$35Qwen Audio 3.0 TTS Pluswins 61%-61%$19.31Languages: loses es, fr, de +36SSimba 3.2wins 58%-87%$6.58Languages: loses es, fr, de +37ModelScoreCostPriceWhat changes
SSimba 3.2wins 58%-87%$6.58Languages: loses es, fr, de +37IRealtime TTS-2 Flashwins 54%-79%$10.42
Voxtral 3 TTSwins 54%-73%$13Languages: loses en, sv, tl +19Fish Audio Drama 3 PreviewOpenwins 58%-69%$15Qwen Audio 3.1 TTS Pluswins 66%-61%$19.31Languages: loses es, ru, ar +28ModelScoreCostPriceWhat changes
Fish Audio Drama 3 PreviewOpenwins 58%-69%$15BBreeze TTS 2Openwins 55%-31%$34Languages: loses es, fr, de +36AMing 3.0 TTSOpensame——Languages: loses pt, it, ru +31Fish Audio S2 ProOpenwins 39%-69%$15
Step Audio EditX (Mar 2026)Openwins 37%——Languages: not verifiedModelScoreCostPriceWhat changes
CSonic 3.6wins 64%same$49CSonic 3wins 32%same$49Languages: not verifiedAll Cartesia models →History
3 versionsFAQ
How much does Sonic 3.5 cost?›
$49 per 1M characters.
Is Sonic 3.5 free to use?›
There is no free API; it costs $49 per 1M characters.
How good is Sonic 3.5, and what is it best at?›
#18 of 96 in Text to speech. Strongest at: Speech & Voice.
Is Sonic 3.5 better than Luna TTS?›
On AA TTS provider voice, Sonic 3.5 scores 1,191.8 vs 1,204.6 — about the same. It is 227% more expensive.
When was Sonic 3.5 released? Is there a newer version?›
Released 2026-05-04. It is the current version in its line.
Is Sonic 3.5 open source?›
No, Sonic 3.5 is a closed model available through an API. The closest open-weights option here is Fish Audio Drama 3 Preview.
What is Sonic 3.5?›
Sonic 3.5 is a closed speech & voice model from Cartesia, released May 2026.
What are the best alternatives to Sonic 3.5?›
Eleven v4 Turbo (cheaper), Simba 3.2 (better), Fish Audio Drama 3 Preview (open weights).