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
Reasoning Not collected
Tool calling Not collected
Structured output Not collected
Streaming Not collected
Batch processing Not collected
Fine-tuning Not collected
Knowledge cutoff Not collected Context caching Not collected No model-specific inference service or discounted prompt-cache contract is established for these research weights.
Access & pricing Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.
API model ID Not collectedDescriptive catalog identity, not a verified selectable API ID.
Access Paper describes internal speech-generation models. No public model selector, original weight download or endpoint-specific tariff is supplied.
Regions Research deployment only; public availability and residency are not established Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms The cited research release does not supply a current production processing/retention agreement. Research access or an expired demonstration is not a production API entitlement.
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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 INPUT Process & retain The system processes eligible input and retains reusable state.
02 / LATER REQUEST Check available state Reuse depends on matching input, session state and the cache policy.
03 / CACHE HIT Reuse & generate Reusing state can reduce repeated work. Any charges follow the billing rules below.
Meta · research reference Not verified No published service cache policy for this research record.
How it works Not collected No published service cache policy for this research record.
Minimum reusable input Not collected No published service cache policy for this research record.
Lifetime & refresh Not collected No published service cache policy for this research record.
How to enable it Not collected No published service cache policy for this research record.
Usage fields Not collected No published service cache policy for this research record.
Billing rules Not collected No published service cache policy for this research record.
Limits & data boundaries Not collected No published service cache policy for this research record.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
What the measurements say
Dubbing model-size study WER Meta research authors · provider-reported 22.97% WER Table 2 1B row, authors’ model-size ablation. Lower is better. Do not compare directly with Table 3’s SFT study or Figure 4’s reranking results.
Evaluation source (opens in a new tab)
Dubbing model-size study speaker similarity Meta research authors · provider-reported 0.72similarity Table 2 1B row; WavLM-based speaker similarity in the authors’ internal dubbing evaluation, not a general quality rating.
Evaluation source (opens in a new tab) 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 Meta’s September 2026 paper and publication describe internally trained Text-AB systems and research evaluations, but supply no original checkpoint download, public API selector or production access contract. The paper’s CC-BY license covers the publication, not a released model-weight artifact. Open mT5, emotion recognizers and other evaluation components do not establish release of Text-AB weights.
Classification evidence (opens in a new tab) Lifecycle dates Sources reviewed Model notes Nine current/historical Muse identities plus closed-weight research models, trained variants and named pipeline components, including 2026 Text-Audiobox research. API availability is explicitly separated from research references. Regional/private models, historical successors and hosted partner routes remain under review.
Research reference only. No public API selector or model-specific price has been verified. Current Muse tariffs, token limits and processing policies do not apply to this record.
Research configuration, not a public API product. No inference price, character quota, cache discount, streaming contract or fine-tuning service is established.
Audio references are optional in the general framework. A reference-free generation can sample a voice; it does not imply a hosted inventory of preset voices.
This model generates the speech after transcription and translation. It does not itself establish an end-to-end speech translation or transcription API.
Size-ablation WER is kept separate from the SFT-data and reranking ablations, whose figures use different experimental settings. No universal language-translation accuracy is inferred.
Check against your workload Try representative inputs, measure task success and total cost, then check the exact endpoint’s data policy.
Read our methodology
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