CartesiaElevenLabsAudio matchupSpeech output
Sonic 3.6vs.Eleven v4
Which model is better?
Eleven v4 does better in independent tests, while Sonic 3.6 is more popular.
Pick Sonic 3.6 for
Pick Eleven v4 for
Shared tests
Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.
VoiceArena
levelSonic 3.6 is clearly ahead in 0 of 4 subtests, Eleven v4 in none. 4 are level.
VoiceArena TTS Elo: Hindi
95 % ranges 1,081 to 1,107 and 1,097 to 1,131, as of October 28, 2026
VoiceArena TTS Elo: Mexican Spanish
95 % ranges 1,065 to 1,097 and 1,047 to 1,089, as of October 28, 2026
VoiceArena TTS Elo: Brazilian Portuguese
95 % ranges 1,062 to 1,094 and 1,054 to 1,086, as of October 28, 2026
Show all 4 subtests
| Subtest | Sonic 3.6 | Eleven v4 | Verdict |
|---|---|---|---|
| VoiceArena TTS Elo: Hindi | 1,094 | 1,114 | level |
| VoiceArena TTS Elo: Mexican Spanish | 1,081 | 1,068 | level |
| VoiceArena TTS Elo: Brazilian Portuguese | 1,078 | 1,070 | level |
| VoiceArena TTS Elo: US English | 1,059 | 1,066 | level |
Source · latest October 28, 2026
Artificial Analysis
Eleven v4 aheadEleven v4 is clearly ahead in 1 of 2 subtests, Sonic 3.6 in none. 1 is level.
Artificial Analysis Provider Voice Arena preference
95 % ranges 1,280 to 1,306 and 1,319 to 1,349, as of November 3, 2026
Artificial Analysis Controlled Voice Arena Elo
95 % ranges 1,135 to 1,159 and 1,143 to 1,167, as of November 3, 2026
Source · latest November 3, 2026
DesignArena
Sonic 3.6 slightly aheadDesignArena Audio Realism Elo
as of October 28, 2026
Source · latest October 28, 2026
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.