Its best voice#92 of 8,414
Puck
4.63naturalness / 5
Voice benchmark · Naturalness · Snapshot 19 Oct 2026
Choose the voice, not the model.
We scored 55,556 voices in 11 languages. In 10 of them, the most natural voice comes from a model the leaderboards don’t rank first.
- languages where the #1 voice is not from the leaderboard’s #1 model
- 10 of 11
- where the English (US) leaderboard pick’s best voice actually ranks
- #92
- voices scored, each one on its own
- 55,556
A model is a library, not a voice.
Model averages bunch together. The voices inside each model spread wide.
Placeholder values. The real spreads land with the data import.
Gemini 3.1 Flash TTSGoogle Cloud · leaderboard pickEleven v4ElevenLabsSonic (preview)CartesiaSonic 3.6Cartesia · has the #1 voiceSonic 3.5CartesiaGemini 3.8 Flash TTSGemini API
Middle 80% of the model’s voicesModel average, what leaderboards rankIts best voiceRange of the averages
Same model, same language. Only the voice changes.
Google Cloud · Gemini 3.1 Flash TTS, the leaderboard pick for English (US). 16 voices scored.
The voice moved the score 19× more than the model did.
Its typical voicethe median
Half of its 16 voices score lower
3.95naturalness / 5
- 0.67
- points between two voices of one model
- 0.04
- points between the top two models
The leaderboard pick, and the voice that beats it.
| Language | Leaderboard pick | Its best voice | #1 voice |
|---|---|---|---|
| English (US) | Leaderboard pickGoogle Cloud · Gemini 3.1 Flash TTS | Its best voice ranks#92 | #1 voiceEvan - Practical GuideCartesia · Sonic 3.6 |
| English (UK) | Leaderboard pickCartesia · Sonic (preview) | Its best voice ranks#1 | #1 voiceOliver - Customer ChapCartesia · Sonic (preview)From the leaderboard pick |
| Spanish (Spain) | Leaderboard pickGemini API · Gemini 3.8 Flash TTS | Its best voice ranks#215 | #1 voicePaloma - Clear Presenter WomanCartesia · Sonic (preview) |
| Spanish (Mexico) | Leaderboard pickCartesia · Sonic (preview) | Its best voice ranks#3 | #1 voiceLuis - Relaxed, Calm and PolishedElevenLabs · Multilingual v2 |
| Portuguese (Brazil) | Leaderboard pickCartesia · Sonic (preview) | Its best voice ranks#3 | #1 voiceIsabella - Warm StorytellerCartesia · Sonic 3.6 |
| Portuguese (Portugal) | Leaderboard pickGemini API · Gemini 3.8 Flash‑Lite TTS | Its best voice ranks#20 | #1 voiceDiogo - Promotion LeadCartesia · Sonic (preview) |
| French | Leaderboard pickCartesia · Sonic (preview) | Its best voice ranks#22 | #1 voiceMaëlysGradium · Gradium TTS |
| German | Leaderboard pickGemini API · Gemini 3.8 Flash‑Lite TTS | Its best voice ranks#4 | #1 voiceAlexandre French CanadianElevenLabs · Eleven v3 |
| Japanese | Leaderboard pickCartesia · Sonic (preview) | Its best voice ranks#37 | #1 voiceLana Weiss – Meditation (soft & calm / weich & warm)ElevenLabs · Eleven v4 |
| Korean | Leaderboard pickCartesia · Sonic 3.5 | Its best voice ranks#7 | #1 voiceLiam - Viral Short-Form StorytellerElevenLabs · Eleven v4 |
| Chinese (Mandarin) | Leaderboard pickCartesia · Sonic (preview) | Its best voice ranks#31 | #1 voiceSerafina - Flirty Sensual TemptressElevenLabs · Eleven v4 |
The #1 voiceBest voice of the leaderboard pickIts other voicesThe top 10, listed below
The top 10 voices, by language.
Missing a language? .
English (US)
8,414 voices scored · top 10 shown
- #1 voice
- Evan - Practical GuideCartesia · Sonic 3.6Naturalness 4.72 · Clarity 4.60
- Leaderboard pick
- Google Cloud · Gemini 3.1 Flash TTSIts best voice ranks #92 of 8,414
- In the top 10
- 7 models from 5 providers
- From the leaderboard pick
- 0 of 10 voices
Who makes the top 10
- Sonic 3.63
- Sonic 3.52
- Gradium TTS1
- Flash v2.51
- Turbo v2.51
- Falcon 21
- Gemini 3.8 Flash‑Lite TTS1
| # | Voice | Naturalnessout of 5 | Clarityout of 5 |
|---|---|---|---|
| 1 | Evan - Practical GuideCartesia · Sonic 3.6Use this voice | 4.72 | 4.60 |
| 2 | KiraGemini API · Gemini 3.8 Flash‑Lite TTSUse this voice | 4.72 | 4.55 |
| 3 | Mary - NurseCartesia · Sonic 3.5Use this voice | 4.72 | 4.44 |
| 4 | Jillian - Happy SpiritCartesia · Sonic 3.6Use this voice | 4.69 | 4.75 |
| 5 | Henry - Plainspoken GuyCartesia · Sonic 3.6Use this voice | 4.69 | 4.64 |
| 6 | ZoeyGradium · Gradium TTSUse this voice | 4.69 | 4.60 |
| 7 | Carson - Disgusted Friendly SupportCartesia · Sonic 3.5Use this voice | 4.69 | 4.55 |
| 8 | Adam - Authentic & Engaging ConversationalistElevenLabs · Turbo v2.5Use this voice | 4.69 | 4.44 |
| 9 | Calvin (M)Murf · Falcon 2Use this voice | 4.69 | 4.44 |
| 10 | Marc Aurèle - Sagesse Stoïque (Méditation & Livre Audio)ElevenLabs · Flash v2.5Use this voice | 4.69 | 4.39 |
All of these voices are routable in Onepin. Try a line in English (US) →
How we scored.
- Metric
- Naturalness on the 1 to 5 scale listening panels use. Higher is better.
- Clarity
- The noise rating on the same 1 to 5 scale. 5 means no audible noise.
- Scorer
- The naturalness estimation model Onepin developed. Predicted scores, highly correlated with human listeners (see chart).
- Coverage
- 55,556 voices in 11 languages, each model in its published generation. Snapshot 19 Oct 2026.
- Leaderboard pick
- Highest average naturalness across its voices in a language, as model leaderboards rank.
- Ties
- Ordered by naturalness, then clarity. Neighbours a few hundredths apart are effectively tied.
- Names
- Providers’ own labels. A multilingual voice can top a language it was not named for.
- Human panel1.00
- Onepin model0.88
- Uni-VERSA-Ext0.69
- Audiobox-CE0.62
- Audiobox-PQ0.61
- UTMOSv20.42
One script. 11 languages. 6 different winners.
Onepin routes every line to the voice that wins its language.
Your script“Dr. Nguyen will call on 3/11 about the $1,240.50 balance.”
- English (US)Evan - Practical GuideCartesia · Sonic 3.6
- English (UK)Oliver - Customer ChapCartesia · Sonic (preview)
- Spanish (Mexico)Luis - Relaxed, Calm and PolishedElevenLabs · Multilingual v2
- FrenchMaëlysGradium · Gradium TTS
- GermanAlexandre French CanadianElevenLabs · Eleven v3
- JapaneseLana Weiss – Meditation (soft & calm / weich & warm)ElevenLabs · Eleven v4
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