Async Flash v1.0 text-to-speech model
asyncReleased Jul 2025.
Async Flash v1.0 is a text-to-speech (TTS) model from async. It ranks #66 of 98 on the Artificial Analysis TTS arena with Elo 1050 (95% CI ±11, 4,106 samples). List price is about $10.1 per 1M characters. Released Jul 2025.
Key facts
- Provider
- async
- AA rank
- #66 / 98
- AA Elo (95% CI)
- 1050 ±11
- AA samples
- 4,106
- TTS Arena Elo (uncertainty)
- –
- TTS Arena votes
- –
- TTS Arena win rate
- –
- Price (per 1M chars)
- $10.1
- Released
- Jul 2025
- Open weights
- –
- 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 |
|---|---|---|---|---|---|
| 63 | RCoda Rime | 1055 | – | $50 | – |
| 64 | DFlux TTS Deepgram | 1055 | – | $45 | – |
| 65 |  MiMo-V2.5-TTS Xiaomi | 1055 | – | – | – |
| 66 | AAsync Flash v1.0 async | 1050 | – | $10.1 | – |
| 67 | MMaya 2 Global Maya Research | 1050 | – | – | – |
| 68 | MMaya1 Maya Research | 1048 | 1401 | – | Open |
| 69 | BHiggs Audio V3 TTS Boson AI | 1045 | – | $15 | Open |
Alternatives · Cheaper with AA Elo ≥ 1020
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 10 | SSimba 3.2 SpeechifyAI | 1246 | – | $6.6 | – |
| 26 | MFalcon 2 Murf AI | 1158 | – | $10 | – |
| 36 | SSimba 3.0 SpeechifyAI | 1119 | – | $6.6 | – |
| 49 |  Gemini 2.5 Flash Lite TTS Google | 1087 | – | $9.2 | – |
| 57 | KKokoro 82M v1.0 Kokoro | 1066 | 1468 | $0.7 | Open |
Alternatives · More from async
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| – | ACastleFlow v1.0 async | – | 1551 | – | – |
| 31 | AAsync Flash v1.5 async | 1141 | – | $10.1 | – |
| 34 | AAsync Pro v1.0 async | 1128 | – | $20.2 | – |
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 Async Flash v1.0 rank among TTS models?
As of Oct 25, 2026, Async Flash v1.0 ranks #66 of 98 on the Artificial Analysis TTS leaderboard with Elo 1050 (±11).
Is Async Flash v1.0 open source?
The sources do not list Async Flash v1.0 as open-weight; it is generally used through the async 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.