Octave TTS text-to-speech model

Hume AIReleased Feb 2025.

Octave TTS is a text-to-speech (TTS) model from Hume AI. It ranks #72 of 98 on the Artificial Analysis TTS arena with Elo 1039 (95% CI ±11, 4,741 samples). On TTS Arena V2 it scores Elo 1517 (±23, 1,170 votes). List price is about $87.5 per 1M characters. Released Feb 2025.

Data updated Oct 25, 2026
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Key facts

AA Elo1039±11#72 / 98

TTS Arena Elo1517±23TTS Arena votes 1,170

Price (per 1M chars)$87.5USD

ReleasedFeb 2025Open weights：–

Provider: Hume AI
AA rank: #72 / 98
AA Elo (95% CI): 1039 ±11
AA samples: 4,741
TTS Arena Elo (uncertainty): 1517 ±23
TTS Arena votes: 1,170
TTS Arena win rate: 53.8%
Price (per 1M chars): $87.5
Released: Feb 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
69	BHiggs Audio V3 TTS Boson AI	1045	–	$15	Open
70	OpenAudio S1 Mini Fish Audio	1045	–	$15	Open
71	Gemini 2.5 Pro (Dec 2025) Google	1040	–	$18.3	–
72	HOctave TTS Hume AI	1039	1517	$87.5	–
73	BBland Speech v3 Bland AI	1035	–	$40	–
74	Azure Neural Microsoft	1034	–	$15	–
75	T2A-01-Turbo MiniMax	1031	–	$30	–

Alternatives · Cheaper with AA Elo ≥ 1009

#	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
62	HOctave 2 Hume AI	1058	–	$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 TTS rank among TTS models?

As of Oct 25, 2026, Octave TTS ranks #72 of 98 on the Artificial Analysis TTS leaderboard with Elo 1039 (±11).

Is Octave TTS open source?

The sources do not list Octave TTS 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