OpenAudio S2 text-to-speech model
Fish AudioCN
OpenAudio S2 is a text-to-speech (TTS) model from Fish Audio. It has no Artificial Analysis score yet. On TTS Arena V2 it scores Elo 1515 (±28, 603 votes).
Key facts
- Provider
- Fish Audio
- AA rank
- –
- AA Elo (95% CI)
- –
- AA samples
- –
- TTS Arena Elo (uncertainty)
- 1515 ±28
- TTS Arena votes
- 603
- TTS Arena win rate
- 50.6%
- Price (per 1M chars)
- –
- Released
- –
- Open weights
- –
- License
- –
- Voices tested by AA
- –
- Languages
- –
- Voice cloning
- –
"–" means the upstream sources do not provide this value; we do not guess.
Nearby models
By TTS Arena Elo; this model highlighted| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 12 | GGradium TTS (pre-2026.08) Gradium | – | 1518 | – | – |
| 13 |  Speech 2.8 Turbo MiniMax | 1156 | 1517 | $60 | – |
| 14 | HOctave TTS Hume AI | 1039 | 1517 | $87.5 | – |
| 15 | OpenAudio S2 Fish Audio | – | 1515 | – | – |
| 16 | Speech 2.6 Turbo MiniMax | 1122 | 1514 | $60 | – |
| 17 | IInworld TTS 1.5 MAX Inworld | – | 1510 | – | – |
| 18 | TTypecast SSFM 3.0 Typecast | – | 1508 | – | – |
Alternatives · More from Fish Audio
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 9 | Fish Audio Drama 3 Preview Fish Audio | 1248 | – | $15 | Open |
| 20 | Fish Audio S2.1 Pro (Oct 2026) Fish Audio | 1186 | – | $15 | – |
| 38 | Fish Audio S2 Pro Fish Audio | 1110 | – | $15 | Open |
| 48 | OpenAudio S1 Fish Audio | 1087 | 1491 | $15 | – |
| 70 | OpenAudio S1 Mini Fish Audio | 1045 | – | $15 | Open |
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 OpenAudio S2 rank among TTS models?
As of Oct 25, 2026, OpenAudio S2 has no Artificial Analysis score; its TTS Arena V2 Elo is 1515 (603 votes).
Is OpenAudio S2 open source?
The sources do not list OpenAudio S2 as open-weight; it is generally used through the Fish Audio API.
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.