Named multilingual speech engine in VoiceLab. Language coverage and controls differ by engine; original model lineage is not disclosed in the reviewed contract.
The route, job ID, voice ID or avatar ID does not identify a native serving checkpoint.
Access
POST https://openapi.akool.com/api/open/v4/voice/tts. Authenticate with x-api-key or Bearer authorization. Account, plan and feature availability apply.
Regions
Published personal-data storage: AWS in the EEA or United States unless otherwise specified. This is not a guarantee of a selectable inference region.
Customer Content is stored for 365 days and users can clear it; other data categories and contractual/legal exceptions have separate retention rules.Source for Data retention (opens in a new tab)
Generated voice resources expire after 7 days. Download completed output; this expiry does not override the privacy policy.Source for expiry (opens in a new tab)
async
Asynchronous job with status 1 queued, 2 processing, 3 completed, 4 failed. Callback or voice-resource listing retrieves the result. Response duration is milliseconds.Source for async (opens in a new tab)
audioSettings
Bitrates 32/64/128/256 kbps, default 128 kbps (MP3 only); mono or stereo, default mono. Chinese/English normalization and optional LaTeX reading.Source for audioSettings (opens in a new tab)
voiceMixing
Up to four timbres with weights 1–100. A supplied top-level voice_id overrides timber_weights. Pronunciation dictionary and pitch/intensity/timbre controls are available.Source for voiceMixing (opens in a new tab)
Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 14 Oct 2026
Category
Usage
Rate
Unit
Published credit rate
Pro text-to-speech1
4.4 credits
1,000 characters
Published credit rate
Pro Max text-to-speech1
3.2 credits
1,000 characters
Published credit rate
Business text-to-speech1
2.4 credits
1,000 characters
Rate conditions
VoiceLab service tariff for the selected plan; no numeric USD conversion established. Enterprise is custom. Underlying engine-specific surcharges are not established.
Terms state customer content and usage data will not be used by Akool or third parties to train machine-learning models. Privacy policy gives Customer Content a 365-day retention period with user deletion, and AWS storage in the EEA or US unless otherwise specified. Generated-resource expiry is separate from storage retention. Contract-specific and legal exceptions apply.
POST https://openapi.akool.com/api/open/v4/voice/clone. Authenticate with x-api-key or Bearer authorization. Account, plan and feature availability apply.
Regions
Published personal-data storage: AWS in the EEA or United States unless otherwise specified. This is not a guarantee of a selectable inference region.
Customer Content is stored for 365 days and users can clear it; other data categories and contractual/legal exceptions have separate retention rules.Source for Data retention (opens in a new tab)
inputFile
Publicly accessible audio URL, maximum 30 MB; examples include MP3, MP4 and WAV. No general enrollment duration ceiling established.Source for inputFile (opens in a new tab)
clone_prompt must exactly match reference speech. Its example audio must be MP3 or WAV, less than 8 seconds and at most 20 MB. This optional prompt-reference rule is distinct from the general 30 MB enrollment upload.Source for referencePrompt (opens in a new tab)
Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms
Terms state customer content and usage data will not be used by Akool or third parties to train machine-learning models. Privacy policy gives Customer Content a 365-day retention period with user deletion, and AWS storage in the EEA or US unless otherwise specified. Generated-resource expiry is separate from storage retention. Contract-specific and legal exceptions apply.
Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.
01 / INITIAL INPUTProcess & retain
The system processes eligible input and retains reusable state.
02 / LATER REQUESTCheck available state
Reuse depends on matching input, session state and the cache policy.
03 / CACHE HITReuse & generate
Reusing state can reduce repeated work. Any charges follow the billing rules below.
Akool
Not verified
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
How it works
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Minimum reusable input
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Lifetime & refresh
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
How to enable it
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Usage fields
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Billing rules
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Limits & data boundaries
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Caching reviewed 14 Oct 2026
Akool
Akool Multilingual 3
Not verified
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
How it works
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Minimum reusable input
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Lifetime & refresh
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
How to enable it
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Usage fields
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Billing rules
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
Limits & data boundaries
Not collected
Saved media, avatar templates, voice assets and temporary result URLs do not establish prompt caching or discounted cached-input pricing.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Caching reviewed 14 Oct 2026
What the measurements say
No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.
Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.
The record behind the model
Why it is included
Documented named hosted service, product or voice-engine selector. The underlying native checkpoint is undisclosed or explicitly supplied by a third party, so this record does not assert independent proprietary Akool weights.
