Octave 2 text-to-speech model
Hume AIReleased Oct 2025.
Octave 2 is a text-to-speech (TTS) model from Hume AI. It ranks #62 of 98 on the Artificial Analysis TTS arena with Elo 1058 (95% CI ±12, 3,213 samples). List price is about $87.5 per 1M characters. Released Oct 2025.
Key facts
- Provider
- Hume AI
- AA rank
- #62 / 98
- AA Elo (95% CI)
- 1058 ±12
- AA samples
- 3,213
- TTS Arena Elo (uncertainty)
- –
- TTS Arena votes
- –
- TTS Arena win rate
- –
- Price (per 1M chars)
- $87.5
- Released
- Oct 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 |
|---|---|---|---|---|---|
| 59 |  Magpie-Multilingual 357M (Feb 2026) NVIDIA | 1065 | – | – | Open |
| 60 |  Chirp 3: HD Google | 1062 | – | $30 | – |
| 61 | CSonic 3 Cartesia | 1058 | – | $49 | – |
| 62 | HOctave 2 Hume AI | 1058 | – | $87.5 | – |
| 63 | RCoda Rime | 1055 | – | $50 | – |
| 64 | DFlux TTS Deepgram | 1055 | – | $45 | – |
| 65 |  MiMo-V2.5-TTS Xiaomi | 1055 | – | – | – |
Alternatives · Cheaper with AA Elo ≥ 1028
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 1 |  Eleven v4 Turbo ElevenLabs | 1336 | – | $40 | – |
| 2 | Eleven v4 ElevenLabs | 1332 | – | $80 | – |
| 3 |  Qwen-Audio-3.1-TTS-Plus Alibaba | 1307 | – | $19.3 | – |
| 4 | CSonic 3.6 Cartesia | 1292 | – | $49 | – |
| 5 | Gemini 3.8 Flash TTS Google | 1280 | – | $16.5 | – |
Alternatives · More from Hume AI
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 72 | HOctave TTS Hume AI | 1039 | 1517 | $87.5 | – |
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 Octave 2 rank among TTS models?
As of Oct 25, 2026, Octave 2 ranks #62 of 98 on the Artificial Analysis TTS leaderboard with Elo 1058 (±12).
Is Octave 2 open source?
The sources do not list Octave 2 as open-weight; it is generally used through the Hume AI 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.