Sonic 3.6 measured on 2 of 3 Text to speech benchmarks2
BenchmarkByScoreRank
No benchmark matches
$49per 1M characters
1,290arena Elo
Aug 2026released
en, es, fr +41Languages
YesVoice cloning
Exact native tariff; see source for billing scope.Price covers
Ranking?
Full ranking →Strong at
Alternatives?
ModelScoreCostPriceWhat changes
CheaperEleven v4 Turbowins 56%-18%$40
BetterQwen Audio 3.1 TTS Pluswins 52%-61%$19.31Languages: loses es, ru, ar +31
OpenFish Audio Drama 3 Previewwins 44%-69%$15ICheaperRealtime TTS-2wins 47%-29%$35CheaperQwen Audio 3.0 TTS Pluswins 47%-61%$19.31Languages: loses es, fr, de +39ModelScoreCostPriceWhat changes
Eleven v4 Turbowins 56%-18%$40Qwen Audio 3.1 TTS Pluswins 52%-61%$19.31Languages: loses es, ru, ar +31IRealtime TTS-2wins 47%-29%$35Qwen Audio 3.0 TTS Pluswins 47%-61%$19.31Languages: loses es, fr, de +39SSimba 3.2wins 44%-87%$6.58Languages: loses es, fr, de +40ModelScoreCostPriceWhat changes
Qwen Audio 3.1 TTS Pluswins 52%-61%$19.31Languages: loses es, ru, ar +31Eleven v4 Turbowins 56%-18%$40Eleven v4wins 56%+63%$80ModelScoreCostPriceWhat changes
Fish Audio Drama 3 PreviewOpenwins 44%-69%$15BBreeze TTS 2Openwins 41%-31%$34Languages: loses es, fr, de +39+1AMing 3.0 TTSOpenwins 36%——Languages: loses pt, it, ru +34Fish Audio S2 ProOpenwins 26%-69%$15Voice cloning: not verified
Step Audio EditX (Mar 2026)Openwins 25%——Languages: not verified+1ModelScoreCostPriceWhat changes
CSonic 3.5wins 36%same$49Languages: loses el, or, ur+1CSonic 3wins 21%same$49Languages: not verified+1All Cartesia models →History
3 versionsFAQ
How much does Sonic 3.6 cost?›
$49 per 1M characters.
Is Sonic 3.6 free to use?›
There is no free API; it costs $49 per 1M characters.
How good is Sonic 3.6, and what is it best at?›
#4 of 96 in Text to speech. Strongest at: Speech & Voice.
Is Sonic 3.6 better than Qwen Audio 3.1 TTS Plus?›
On AA TTS provider voice, Sonic 3.6 scores 1,290.1 vs 1,306.3 — lower. It is 154% more expensive.
When was Sonic 3.6 released? Is there a newer version?›
Released 2026-08-17. It is the current version in its line.
Is Sonic 3.6 open source?›
No, Sonic 3.6 is a closed model available through an API. The closest open-weights option here is Fish Audio Drama 3 Preview.
What is Sonic 3.6?›
Sonic 3.6 is a closed speech & voice model from Cartesia, released Aug 2026.
What are the best alternatives to Sonic 3.6?›
Eleven v4 Turbo (cheaper), Qwen Audio 3.1 TTS Plus (better), Fish Audio Drama 3 Preview (open weights).