TTS-1 HD text-to-speech model
OpenAIReleased Nov 2023.
TTS-1 HD is a text-to-speech (TTS) model from OpenAI. It ranks #40 of 98 on the Artificial Analysis TTS arena with Elo 1103 (95% CI ±11, 3,787 samples). List price is about $30 per 1M characters. Released Nov 2023.
Key facts
- Provider
- OpenAI
- AA rank
- #40 / 98
- AA Elo (95% CI)
- 1103 ±11
- AA samples
- 3,787
- TTS Arena Elo (uncertainty)
- –
- TTS Arena votes
- –
- TTS Arena win rate
- –
- Price (per 1M chars)
- $30
- Released
- Nov 2023
- Open weights
- –
- License
- –
- Voices tested by AA
- 6
- 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 |
|---|---|---|---|---|---|
| 37 |  Speech-02-HD MiniMax | 1111 | 1504 | $100 | – |
| 38 |  Fish Audio S2 Pro Fish Audio | 1110 | – | $15 | Open |
| 39 | RChatterbox HD Resemble AI | 1110 | – | $40 | – |
| 40 | TTS-1 HD OpenAI | 1103 | – | $30 | – |
| 41 |  Step Audio EditX (Mar 2026) StepFun | 1100 | – | – | Open |
| 42 |  Turbo v2.5 ElevenLabs | 1099 | 1497 | $50 | – |
| 43 | HSpeech 2.6 Hithink | 1097 | 1491 | – | – |
Alternatives · Cheaper with AA Elo ≥ 1073
| # | 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 OpenAI
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 47 | TTS-1 OpenAI | 1089 | – | $15 | – |
| 51 | GPT-Realtime-2 OpenAI | 1077 | – | $191.6 | – |
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 TTS-1 HD rank among TTS models?
As of Oct 25, 2026, TTS-1 HD ranks #40 of 98 on the Artificial Analysis TTS leaderboard with Elo 1103 (±11).
Is TTS-1 HD open source?
The sources do not list TTS-1 HD as open-weight; it is generally used through the OpenAI 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.