Chatterbox text-to-speech model
Resemble AIOpenReleased May 2025.
Chatterbox is a text-to-speech (TTS) model from Resemble AI. It ranks #78 of 98 on the Artificial Analysis TTS arena with Elo 1025 (95% CI ±11, 4,724 samples). On TTS Arena V2 it scores Elo 1471 (±19, 1,806 votes). List price is about $25 per 1M characters. Weights are openly available for self-hosting. Released May 2025.
Key facts
- Provider
- Resemble AI
- AA rank
- #78 / 98
- AA Elo (95% CI)
- 1025 ±11
- AA samples
- 4,724
- TTS Arena Elo (uncertainty)
- 1471 ±19
- TTS Arena votes
- 1,806
- TTS Arena win rate
- 48.1%
- Price (per 1M chars)
- $25
- Released
- May 2025
- Open weights
- Yes
- License
- –
- Voices tested by AA
- 8
- Languages
- –
- Voice cloning
- –
"–" means the upstream sources do not provide this value; we do not guess.
Nearby models
By AA Elo; this model highlighted| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 75 |  T2A-01-Turbo MiniMax | 1031 | – | $30 | – |
| 76 |  Polly Long-Form Amazon | 1031 | – | $100 | – |
| 77 |  MAI-Voice-1 Microsoft | 1030 | – | – | – |
| 78 | RChatterbox Resemble AI | 1025 | 1471 | $25 | Open |
| 79 | SLightning v3.1 Smallest.ai | 1023 | – | $25 | – |
| 80 | KRaon SpeechLM Krafton | 1006 | – | – | – |
| 81 | ZZonos-v0.1 Zyphra | 1000 | – | $20 | Open |
Alternatives · Cheaper with AA Elo ≥ 995
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 3 |  Qwen-Audio-3.1-TTS-Plus Alibaba | 1307 | – | $19.3 | – |
| 5 |  Gemini 3.8 Flash TTS Google | 1280 | – | $16.5 | – |
| 6 | IRealtime TTS-2 Inworld | 1270 | – | $20.8 | – |
| 7 | Qwen-Audio-3.0-TTS-Plus Alibaba | 1266 | – | $19.3 | – |
| 8 | Gemini 3.8 Flash-Lite TTS Google | 1252 | – | $11 | – |
Alternatives · More from Resemble AI
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 39 | RChatterbox HD Resemble AI | 1110 | – | $40 | – |
Alternatives · Top 5 open-weight by AA Elo
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 9 |  Fish Audio Drama 3 Preview Fish Audio | 1248 | – | $15 | Open |
| 11 | BBreeze TTS 2 BreezeBlue | 1230 | – | $34 | Open |
| 19 |  Ming-3.0-tts Ant Group | 1191 | – | – | Open |
| 38 | Fish Audio S2 Pro Fish Audio | 1110 | – | $15 | Open |
| 41 |  Step Audio EditX (Mar 2026) StepFun | 1100 | – | – | Open |
FAQ
Where does Chatterbox rank among TTS models?
As of Oct 25, 2026, Chatterbox ranks #78 of 98 on the Artificial Analysis TTS leaderboard with Elo 1025 (±11).
Is Chatterbox open source?
Yes. Chatterbox has open weights and can be self-hosted.
What is the best Chinese TTS model?
By AA Elo, the top model from a Chinese provider is Qwen-Audio-3.1-TTS-Plus by Alibaba (Elo 1307, #3 overall).
Which top-10 TTS model is cheapest?
Among the AA top 10, the lowest list price is Simba 3.2 (SpeechifyAI) at $6.6 per 1M characters, Elo 1246.
What is the best open-source TTS model?
By AA Elo, the top open-weight model is Fish Audio Drama 3 Preview by Fish Audio (Elo 1248, #9 overall); 18 open-weight models have an AA score.
Sources
"–" means the upstream sources do not provide this value; we do not guess.