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 →···
7Qwen Audio 3.0 TTS Plus1,126.98Sonic 3.51,118.29Simba 3.21,085.9Strong at
Alternatives?
ModelScoreCostPriceWhat changes
HCheaperHeyGen Voicewins 61%-39%$30Languages: not verified
BetterQwen Audio 3.1 TTS Pluswins 59%-61%$19.31Languages: loses es, ru, ar +28AOpenMing 3.0 TTSwins 44%——Languages: loses pt, it, ru +31
CheaperEleven v4 Turbowins 55%-18%$40ICheaperRealtime TTS-2wins 54%-29%$35ModelScoreCostPriceWhat changes
HHeyGen Voicewins 61%-39%$30Languages: not verifiedQwen Audio 3.1 TTS Pluswins 59%-61%$19.31Languages: loses es, ru, ar +28Eleven v4 Turbowins 55%-18%$40IRealtime TTS-2wins 54%-29%$35Qwen Audio 3.0 TTS Plussame-61%$19.31Languages: loses es, fr, de +36ModelScoreCostPriceWhat changes
Qwen Audio 3.1 TTS Pluswins 59%-61%$19.31Languages: loses es, ru, ar +28HHeyGen Voicewins 61%-39%$30Languages: not verifiedIRealtime TTS-2wins 54%-29%$35Eleven v4 Turbowins 55%-18%$40CSonic 3.6wins 55%same$49ModelScoreCostPriceWhat changes
AMing 3.0 TTSOpenwins 44%——Languages: loses pt, it, ru +31
Fish Audio Drama 3 PreviewOpenwins 42%-69%$15BBreeze TTS 2Openwins 37%-31%$34Languages: loses es, fr, de +36OpenAudio S1 MiniOpenwins 35%-69%$15Languages: loses hi, sv, tr +25
Voxtral TTSOpenwins 35%-67%$16Languages: loses zh, ja, ko +29ModelScoreCostPriceWhat changes
CSonic 3.6wins 55%same$49CSonic 3wins 28%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 Qwen Audio 3.0 TTS Plus?›
On AA TTS controlled voice, Sonic 3.5 scores 1,118.2 vs 1,126.9 — about the same. It is 154% 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 Ming 3.0 TTS.
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?›
HeyGen Voice (cheaper), Qwen Audio 3.1 TTS Plus (better), Ming 3.0 TTS (open weights).