OpenAICartesiaAudio matchupSpeech output
GPT-4o Mini TTSvs.Sonic 3.6
Which model is better?
Sonic 3.6 does better in independent tests.
Pick GPT-4o Mini TTS for
Pick Sonic 3.6 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
Sonic 3.6 aheadSonic 3.6 is clearly ahead in 4 of 4 subtests, GPT-4o Mini TTS in none.
VoiceArena TTS Elo: Hindi
95 % ranges 824 to 844 and 1,081 to 1,107, as of October 28, 2026
VoiceArena TTS Elo: Mexican Spanish
95 % ranges 853 to 897 and 1,065 to 1,097, as of October 28, 2026
VoiceArena TTS Elo: Brazilian Portuguese
95 % ranges 931 to 949 and 1,062 to 1,094, as of October 28, 2026
Show all 4 subtests
| Subtest | GPT-4o Mini TTS | Sonic 3.6 | Verdict |
|---|---|---|---|
| VoiceArena TTS Elo: Hindi | 834 | 1,094 | Sonic 3.6 ahead |
| VoiceArena TTS Elo: Mexican Spanish | 875 | 1,081 | Sonic 3.6 ahead |
| VoiceArena TTS Elo: Brazilian Portuguese | 940 | 1,078 | Sonic 3.6 ahead |
| VoiceArena TTS Elo: US English | 926 | 1,059 | Sonic 3.6 ahead |
Source · latest October 28, 2026
Coval
Sonic 3.6 slightly aheadCoval TTS leaderboard
lower is better, as of October 23, 2026
Source · latest October 23, 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.
| GPT-4o Mini TTS | Sonic 3.6 | |
|---|---|---|
| Task | Speech output | Speech output |
| Developer | OpenAI | Cartesia |
| Status | Deprecated | Active |
| Weights | proprietary | proprietary |
| Runs locally | no | no |
| Price | $0.60 per 1M text tokens | n/a |
| Popularity (out of 100) | 36 | 39 |