Hume OCTAVE
Hume OCTAVE generates a full AI voice and personality from a text prompt or a 5-second recording.
OCTAVE is the most interesting option when the voice IS the product — a coach, a companion, a multi-speaker scene — and prompting a persona beats assembling one from three vendors. For cheap neutral narration at volume, the economics don't favor it and a commodity TTS endpoint wins. Treat the November 13, 2026 TTS and EVI API sunset as a real constraint: prototype here, but don't architect a 2027 product on those endpoints without a migration plan.
Verified 3d ago · liveness 75/100 · cite: rightaichoice.com/tools/hume-octave
- Developers building companion, coaching or therapy agents that need one consistent persona across many turns
- Studios producing multi-character interactive audio or training simulations in a single real-time response
- Teams prototyping personas from a prompt instead of hiring voice talent for early demos
- Products that only have a noisy 5-second reference clip and still need clean, usable dialogue
- Anyone planning to keep running on the TTS or EVI APIs after November 13, 2026 without a migration plan
- High-volume, neutral narration where price per character is the deciding factor
- Offline, air-gapped or on-premise deployments
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Skip OCTAVE if your product has to keep speaking past November 13, 2026 — Hume is sunsetting the TTS and EVI APIs, with access ending then and account data permanently deleted afterwards.
Characters and EVI minutes are metered as two separate buckets, so a chatty agent that also listens a lot bills you twice for the same conversation.
OCTAVE sits at the premium end of voice AI: the entry point is genuinely cheap — Starter at $3/mo and Creator at $14/mo after a $7 first month — but serious production use starts around Pro at $70/mo, Scale at $200/mo and Business at $500/mo, which is above what commodity TTS endpoints charge and in the same range as ElevenLabs' higher tiers. Solo prototypers get a lot for very little; teams with high character volume should compare the per-character rate (down to $0.05 per 1,000 on Business)
In short
Hume OCTAVE — Hume OCTAVE generates a full AI voice and personality from a text prompt or a 5-second recording. Best for Developers building companion, coaching or therapy agents that need one consistent persona across many turns, Studios producing multi-character interactive audio or training simulations in a single real-time response, Teams prototyping personas from a prompt instead of hiring voice talent for early demos. Free to start; paid plans from $3/mo.
What's new in Hume OCTAVE
Checked 2 days agoAcross the latest 8 updates: 3 launches, 1 changelog entry, 1 community discussion and 3 news mentions.
Behind Hume's Expression Measurement Models for Face and Voice
Hume published the science and evaluation behind its Expression API for real-time measurement of voice and facial expressions.
Hume introduces Expression APIs for measuring 600+ dimensions in 50+ languages
Hume launched Expression APIs, measuring 600+ dimensions of expression across 50+ languages — expanding beyond voice into multimodal emotion signals.
Hume to sunset TTS and EVI APIs on November 13, 2026
Hume is sunsetting its TTS and EVI APIs. Access ends November 13, 2026; account data permanently deleted after that date.
Hume case study evaluates Google's multi-speaker TTS
Hume published an evaluation of Google's multi-speaker TTS, arguing private evaluations matter for conversational speech quality.
Gemini 3.8 Flash TTS tops Hume's Real-World VoiceEQ leaderboard
Hume extended Real-World VoiceEQ to cover controllability and replication; Google's Gemini 3.8 Flash TTS takes the top spot.
Google announces Gemini 3.8 Flash TTS and Flash-Lite TTS
Hume flags Google's new Gemini 3.8 Flash TTS and Flash-Lite TTS models as its most expressive audio generation models to date.
Hume launches Voice Replication Leaderboard
Hume's Voice Replication Leaderboard rates eleven text-to-speech models on how faithfully they replicate a target voice.
Hume launches Voice Controllability Leaderboard
New leaderboard tests whether TTS models follow direction — finding some models ignore controllability prompts entirely.
What people actually say about Hume OCTAVE — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
4 mentions across 2 sources (Hacker News, Product Hunt) · researched Jul 5, 2026.
Average across the 2 sources that answered — each source counts once, not each post.
- +Generates voices and personalities from creative text prompts or 5-second clips.
- +Emotionally intelligent speech with appropriate tone, pacing, and nuance.
- +Multi-voice generation in a single response for conversational scenarios.
- +Real-time interactive voice with low-latency speech-to-speech via EVI 3.
- +Multilingual support added in October 2025 OCTAVE 2 update.
- −Community feedback is too sparse to confirm reliability or quality.
- −No detailed comparisons against ElevenLabs or OpenAI Voice Engine.
- −Lacks public benchmark results for voice cloning accuracy or latency.
- −No integration documentation for popular platforms like Zapier or Discord.
- −Pricing details are vague; premium plans' cost is not disclosed.
- • Exact pricing for Pro and Business plans not publicly listed
- • Usage overage charges likely apply beyond free tier limits
Viability Score
How well maintained and how widely used is Hume OCTAVE? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- Generate a voice, accent and disposition from a descriptive text prompt
- Clone voice, accent and speaking style from a 5-second noisy recording
- Generate the language and the voice together rather than chaining separate models
- Real-time speech-to-speech interaction via EVI 3 and EVI 4 mini
- Generate dialog for multiple interacting speakers within a single real-time response
- Emit an in-character interjection from a third speaker mid-response
- Inject text instructions mid-generation to steer part of a reply
- Voice continuation from an existing audio clip
- Voice cloning create and use included on every tier at no extra charge
- Text-to-speech on Octave 1 and Octave 2, including multilingual output
- Follow detailed instructions and use tools while holding a persona
- External LLM support for controlling generated language
- Evaluate voice systems with VoiceEQ, Expression APIs and Prism Pipeline
- SDKs for Python, Node.js, React, TypeScript, Swift and .NET
- SOC 2 Type II, GDPR and HIPAA compliance
About Hume OCTAVE
OCTAVE (Omni-Capable Text and Voice Engine) is a speech-language model built for the case where a flat, generic voice ruins the product. Describe a persona in plain language — "a Brooklyn cab driver with a rapid-fire, nasal voice," "a gentle therapist with thoughtful pauses" — and OCTAVE generates the voice, accent, register, intonation and the language that fits it in one system, instead of wiring a transcription model, an LLM and a TTS endpoint together. It handles the reverse direction too: a noisy 5-second clip is enough to extract a speaker's voice, accent and disposition, then generate clean new dialogue in that character. Any persona you prompt or adopt can run in real-time interaction, and OCTAVE can voice multiple interacting characters inside a single response, including an interjection from a third speaker mid-turn. You can also splice a text instruction into the start of a reply and let OCTAVE improvise the rest. Language performance is pitched against a similar-sized frontier LLM, so the same model that picks the words holds the persona, follows detailed instructions and uses tools. Who it's for: developers shipping companion, coaching, therapy, education and interactive-audio products where tone and pacing carry the experience, plus studios that need multi-character dialogue without hiring a cast for a prototype. Access has widened well past the December 2024 limited trusted-partner release described in the launch post, and the platform has expanded into evaluation and measurement tooling (VoiceEQ, Expression APIs, Prism Pipeline, Human Feedback API). Positioning: ElevenLabs and Cartesia sell strong TTS; NotebookLM generates two-host dialogue. OCTAVE's bet is the combination — prompt-designed or few-shot-cloned personalities that improvise in real time. Weigh that against a hard deadline: Hume is sunsetting the TTS and EVI APIs on November 13, 2026, with account data deleted afterward. Build accordingly.
Behind the Verdict
The pitch that matters here is one model doing three jobs. Transcription plus LLM plus TTS produces speech that sounds assembled; OCTAVE decides the words and the delivery together, and that's why a persona holds its character across a long conversation instead of drifting. We'd reach for it when the persona is load-bearing. Prompt-based voice design is the fastest path we've seen from "I want a Welsh narrator who builds suspense" to something you can actually ship and A/B. The recording path is the sleeper feature — a 5-second clip from a noisy mic is often all you have when a client hands you reference audio, and OCTAVE turns that into usable, clean dialogue. The multi-speaker behavior is genuinely uncommon. Generating two or three interacting characters, with an interjection landing mid-response, is the kind of thing that normally takes a stitching layer and a lot of luck. In practice that's what makes training simulations and interactive audio feel alive rather than edited. Where it bites: consumption-based billing means creative exploration costs real money, and there's no flat per-seat predictability for finance teams. Cloning every tier at no extra charge is generous, but it also puts the compliance question in your lap — you still need consent and provenance for adopted voices. Offline and on-premise deployments aren't the shape of this product. Compare before committing. ElevenLabs v3 and Cartesia Sonic are the names buyers put next to this, and they're credible on plain TTS quality and price-per-character. NotebookLM is the reference point for two-host dialogue. OCTAVE's argument is breadth: one engine for design, cloning, real-time interaction and multi-character scenes, with the same intelligence writing the lines. And then there's the clock. Hume is
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Real-world workflow fit
Concrete scenarios for the personas Hume OCTAVE actually fits — and what changes day-one when you adopt it.
Sign up on the Free tier, describe a persona in a text prompt, iterate until the voice and language match, then clone a real voice from a 5-second clip and drop it into an EVI real-time session.
Outcome: A working companion prototype with a consistent persona in days, on $0 until the character allowance runs out, at 1 concurrent connection and 15 requests per minute.
Wire OCTAVE speech-to-speech through LiveKit or Pipecat, tune tone and pacing per call using text injection for the opening lines, and raise the tier as call volume grows.
Outcome: In-production agents with measurable tone control, budgeted at $0.04-$0.07 per real-time minute plus per-character TTS, with a migration plan to a successor voice stack before November 13, 2026.
Describe each character in a prompt, generate their voices and the accompanying dialog, then have OCTAVE switch between interacting speakers — including interjections — inside single responses.
Outcome: Multi-character scenes rendered without separate voice talent or per-speaker stitching, on Creator or Pro where the commercial license applies.
Use Cases
- Build a personalized AI companion with a unique voice and personality cloned from a 5-second recording
- Produce a multi-character audio drama with distinct voices and accents generated from text descriptions
- Ship an empathetic support agent that adapts tone and pacing to the caller's emotion in real time
- Generate expressive narration for audiobooks or educational content with context-aware delivery
- Run interview or coaching simulations with dynamic voice modulation and mid-session instruction changes
Models Under the Hood
as of 2026-10-18
Limitations
- OCTAVE generates voices, personalities, and accompanying language from a descriptive text prompt or a recording as brief as 5 seconds, and can produce multiple interacting AI personalities within a real-time response.
- Per Hume's changelog, the TTS and EVI APIs are being sunset: access ends November 13, 2026, with account data permanently deleted afterward.
- Detailed pricing and rate-limit information is not present in the available live evidence.
as of 2026-10-08
Verification history
We have re-verified Hume OCTAVE 11 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Showing the 6 most recent of 11 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Hume OCTAVE tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Free
$0/mo
Ideal for
A solo developer testing whether prompt-based voice design produces a usable persona before spending anything.
What this tier adds
Free entry point: 10,000 characters (~10 minutes), 5 minutes of EVI, 15 requests per minute and 1 concurrent connection.
Starter
$3/mo
Ideal for
An individual builder running a small pilot or demo where usage is measured in tens of minutes, not hours.
What this tier adds
Adds 30,000 characters, 40 EVI minutes and 5 concurrent connections for $3/mo, with a 50% first-month discount.
Creator
$7/mo first month, then $14/mo
Ideal for
A creator or indie studio shipping a voiced product commercially for the first time.
What this tier adds
Lifts the allowance to 140,000 characters and 200 EVI minutes, raises the rate limit to 75 requests per minute, and adds a commercial license ($7 first month, then $14/mo).
Pro
$70/mo
Ideal for
A small product team with steady traffic and more than one person building on the API.
What this tier adds
Jumps to 1,000,000 characters and 1,200 EVI minutes, drops the per-character overage to $0.12, and adds organization and Team seats for $70/mo.
Scale
$200/mo
Ideal for
A growing company whose voice agent is in regular production use and needs headroom plus a few seats.
What this tier adds
3,300,000 characters and 5,000 EVI minutes, 150 requests per minute, 20 concurrent connections and 3 Team seats for $200/mo.
Business
$500/mo
Ideal for
A deployed voice product with meaningful call volume and a support relationship it can escalate.
What this tier adds
10,000,000 characters and 12,500 EVI minutes, the cheapest overage rates ($0.05 per 1,000 characters, $0.04 per EVI minute), 30 concurrent connections, 5 Team seats and Slack support for $500/mo.
Enterprise
Custom
Ideal for
Larger organizations that need custom volume, custom rate limits or API access to cloned voices.
What this tier adds
Custom characters, EVI minutes, requests per minute, connections and overage rate, with unlimited Team seats, Slack support and SOC 2 Type II / GDPR / HIPAA compliance.
Where the pricing makes sense
The company stage and team size where Hume OCTAVE's pricing actually pencils out — and where peers do it cheaper.
OCTAVE sits at the premium end of voice AI: the entry point is genuinely cheap — Starter at $3/mo and Creator at $14/mo after a $7 first month — but serious production use starts around Pro at $70/mo, Scale at $200/mo and Business at $500/mo, which is above what commodity TTS endpoints charge and in the same range as ElevenLabs' higher tiers. Solo prototypers get a lot for very little; teams with high character volume should compare the per-character rate (down to $0.05 per 1,000 on Business)
Setup time & first value
How long it actually takes to get something useful out of Hume OCTAVE — broken out by persona, not the marketing-page minute.
A developer can get a first generated voice in under an hour: sign up, paste a descriptive prompt, listen, and iterate. Cloning a voice from a 5-second clip is a single-shot step, so a working persona with a cloned voice is a same-day job. Wiring real-time speech-to-speech through LiveKit, Pipecat or Vapi typically takes a few days, and the work that actually slows teams down is budgeting
Switching to or from Hume OCTAVE
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From ElevenLabs: use OCTAVE's prompt-based voice design for personas you previously built from premade voice libraries, and clone the same source recordings you used there.
- →From Google NotebookLM-style two-host audio: OCTAVE can replicate a multi-speaker dialog from a single sample recording, then generate new episodes in that format.
- →From a stitched ASR + LLM + TTS pipeline: replace the three services with one speech-language model so tone survives from user speech to generated reply.
- →From OpenAI's voice engine demos: extend an existing recording or demo clip and keep generating in the same voice and personality.
- →From a scripted IVR or read-aloud TTS: move to EVI real-time sessions where the agent answers in-character instead of playing back fixed lines.
- ↗To ElevenLabs: move TTS workloads where a large premade voice library and long-standing TTS tooling matter more than persona-driven language generation.
- ↗To Cartesia Sonic: move low-latency production TTS where a single flat per-character rate is easier to forecast than tiered characters plus EVI minutes.
- ↗To a self-hosted or on-prem TTS stack: move if your deployment cannot leave your own infrastructure, which OCTAVE does not support.
- ↗To a commodity cloud TTS endpoint: move high-volume neutral narration where expressiveness adds nothing and per-character cost decides the vendor.
- ↗To a competitor voice model: necessary for any product still running after November 13, 2026, when Hume's TTS and EVI API access ends.
Integrations
Resources & Guides
Tutorials & Learning
This free AI Speech is Wild! Acting & Emotion Performances!
Theoretically Media
Hume AI Full Tutorial | AI Speech Synthesis | Emotional Voice Interface | Empathic AI | Nov 2025
Tools to Upskill
YouTube returned 6 videos for “Hume OCTAVE”, and we withheld 4: 4 did not mention Hume OCTAVE. Showing the 2 we can prove are about Hume OCTAVE.
Official links
Tools that pair well with Hume OCTAVE
Common stack mates teams adopt alongside Hume OCTAVE, with the specific reason each pairing earns its keep.
Noiz AI
Noiz AI clones a voice from about 3 seconds of audio and turns text, video, and images into finished, emotional AI voiceover.
Murf AI
Low-latency text-to-speech API and AI voice agents — Murf AI runs real-time phone conversations at 1 cent per minute.
Fish Audio
Fish Audio delivers expressive AI text to speech and voice cloning, with emotion tags and a free S2.1 Pro TTS API.
Featured Head-to-Head Comparisons
Hume Octave vs Storyfile
Choose Hume OCTAVE if you need a flexible, generative voice platform for building interactive agents or expressive narration—it offers freemium pricing and cutting-edge speech-to-speech capabilities (EVI 3). Choose StoryFile if your project requires authentic human video responses, such as museum exhibits or legacy preservation, where real footage and emotional integrity are paramount. Both excel in their niches but serve fundamentally different needs.
Hume Octave vs Landr Mastering
If you need to generate lifelike, emotionally nuanced voices for AI interactions, Hume OCTAVE (especially Octave 2) leads with personality cloning and real-time S2S. For musicians and content creators who want quick, professional mastering without hiring an engineer, LANDR Mastering offers unlimited previews and stem mastering (Pro). These tools serve entirely different domains—choose based on whether your primary need is voice generation or audio polishing.
Hume Octave vs Splice
Splice and Hume OCTAVE serve completely different needs. Splice is the go-to for music producers needing millions of royalty-free samples and rent-to-own plugins, with a new DAW plugin beta. Hume OCTAVE is for developers building voice AI that generates realistic, expressive personalities from short clips or text. Choose based on your workflow: music creation vs. voice agent development.
Alternatives to Hume OCTAVE
View all
Noiz AI
Noiz AI clones a voice from about 3 seconds of audio and turns text, video, and images into finished, emotional AI voiceover.
Murf AI
Low-latency text-to-speech API and AI voice agents — Murf AI runs real-time phone conversations at 1 cent per minute.
Fish Audio
Fish Audio delivers expressive AI text to speech and voice cloning, with emotion tags and a free S2.1 Pro TTS API.
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