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
HCheaperHeyGen Voicewins 57%-39%$30Languages: not verified+1
BetterQwen Audio 3.1 TTS Pluswins 55%-61%$19.30Languages: loses es, ru, ar +31AOpenMing 3.0 TTSwins 38%——Languages: loses pt, it, ru +34
CheaperEleven v4 Turbosame-18%$40ICheaperRealtime TTS-2same-29%$35ModelScoreCostPriceWhat changes
HHeyGen Voicewins 57%-39%$30Languages: not verified+1Qwen Audio 3.1 TTS Pluswins 55%-61%$19.30Languages: loses es, ru, ar +31Eleven v4 Turbosame-18%$40IRealtime TTS-2same-29%$35Qwen Audio 3.0 TTS Pluswins 46%-61%$19.30Languages: loses es, fr, de +39ModelScoreCostPriceWhat changes
Qwen Audio 3.1 TTS Pluswins 55%-61%$19.30Languages: loses es, ru, ar +31HHeyGen Voicewins 57%-39%$30Languages: not verified+1ModelScoreCostPriceWhat changes
AMing 3.0 TTSOpenwins 38%——Languages: loses pt, it, ru +34
Fish Audio Drama 3 PreviewOpenwins 37%-69%$15BBreeze TTS 2Openwins 32%-31%$34Languages: loses es, fr, de +39+1OpenAudio S1 MiniOpenwins 30%-69%$15Languages: loses hi, sv, tr +28+1
Voxtral TTSOpenwins 30%-67%$16Languages: loses zh, ja, ko +32+1ModelScoreCostPriceWhat changes
CSonic 3.5wins 45%same$49Languages: loses el, or, ur+1CSonic 3wins 24%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 Eleven v4?›
On AA TTS controlled voice, Sonic 3.6 scores 1,151 vs 1,156 — about the same. It is 39% cheaper.
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 Ming 3.0 TTS.
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?›
HeyGen Voice (cheaper), Qwen Audio 3.1 TTS Plus (better), Ming 3.0 TTS (open weights).