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Model infoModelsSnapshot: 15 Oct 2026

Resemble AI / Resemble Core STS

Resemble Legacy STS

A documented native voice-conversion version that preserves delivery from a donor recording. Availability requires a compatible target voice.

Speech & voice
restrictedClosed weightsSpeech-to-speech
Official documentation (opens in a new tab)Reviewed 13 Oct 2026
6 of 18 specification fields collected
Context windowNot collectedAwaiting source review
Maximum outputNot collectedAwaiting source review
Input billingNot collectedResemble AI
Output billingNot collectedNo inferred price

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected
Maximum output
Not collected
Input modalities
AudioSource for Input modalities (opens in a new tab)
Output modalities
AudioSource for Output modalities (opens in a new tab)
Reasoning
Not collected
Tool calling
Not collected
Structured output
Not collected
Streaming
SupportedSource for Streaming (opens in a new tab)

The version table reports streaming, but the reviewed STS guide demonstrates a synchronous request. A pinned streaming contract remains unverified.

Batch processing
Not collected
Fine-tuning
Not collected
Knowledge cutoff
Not collected
Release date
Q2 2021Source for Release date (opens in a new tab)

The provider gives a quarter, not an exact release day.

Parameters
Not collected
Architecture
Not collected
Languages
Not collected
Context caching
Not collected
Application selector
sts-legacySource for Application selector (opens in a new tab)

Voice model version. The synchronous request selects voice_uuid, not this string as a model field.

Required request fields
At least 10 minutes of training recordings for the target voiceSource for Required request fields (opens in a new tab)

Training dataset requirement, not a minimum donor inference duration.

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Resemble AI

Provider source (opens in a new tab)
API model ID
Not collected

No public request selector pins this model version.

Access
Requires a provisioned compatible target voice and API access. Route is shared; model version is voice-dependent.
Regions
Region and data residency not established for this access path.
API endpoint URL
https://f.cluster.resemble.ai/synthesizeSource for API endpoint URL (opens in a new tab)
Required request fields
voice_uuid and SSML resemble:convert pointing to a single-speaker WAV sourceSource for Required request fields (opens in a new tab)
Maximum audio file
50 MB donor file; larger input is trimmedSource for Maximum audio file (opens in a new tab)
Audio duration limits
300 seconds donor audio; longer input is trimmedSource for Audio duration limits (opens in a new tab)
Output formats
WAV, MP3Source for Output formats (opens in a new tab)
Audio controls
Pitch transposition from -10 to +10 and optional primer textSource for Audio controls (opens in a new tab)

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Terms distinguish voice Content from Detection Media. Detection Media is not used for model training without express written opt-in. Deletion/retention follow service policies and any applicable DPA; no unconditional zero-retention guarantee.

Read the service policy (opens in a new tab)

Caching

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.

Resemble AI

Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

No verified cache rate for this endpoint. An empty rate is not a zero charge.

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

Provider documentation establishes the named native model or managed composition. Terms expressly reserve proprietary voice/detection technology and prohibit reverse engineering of models. Public-weight Chatterbox, original PerTh and Resemblyzer are excluded; enterprise on-premises delivery is not treated as a public weight release.

Classification evidence (opens in a new tab)

Sources reviewed