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Model infoModelsSnapshot: 15 Oct 2026

IBM / Watson previous-generation STT

Watson STT: Portuguese (Brazilian) Narrowband

Discontinued IBM speech recognition model, retained with its original API selector and recommended replacement.

retiredClosed weightsSpeech-to-text
Official documentation (opens in a new tab)Reviewed 14 Oct 2026
4 of 17 specification fields collected
Audio sample ratesMinimum 8 kHz audioSee specification notes below
Languages1 listedFull language list in specifications
Input billingNot collectedIBM Watson Speech to Text (historical)
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
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
Release date
Not collected
Parameters
Not collected
Architecture
Not collected
Languages
Portuguese (Brazilian)Source for Languages (opens in a new tab)
Context caching
Not collected
Audio sample rates
Minimum 8 kHz audioSource for Audio sample rates (opens in a new tab)

Higher rates are resampled. This is not a parameter count or a model context window.

Access & pricing

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

IBM Watson Speech to Text (historical)

Provider source (opens in a new tab)
API model ID
pt-BR_NarrowbandModel
Access
Discontinued hosted model selector. Retained for migration and historical reference; no current inference route is implied.
Regions
Use the service-instance URL for the provisioned region. Product-edition and voice-specific availability apply; no universal residency guarantee inferred.

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

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

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.

IBM Watson Speech to Text (historical)

pt-BR_NarrowbandModel
Not verified

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

How it works
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

Minimum reusable input
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

Lifetime & refresh
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

How to enable it
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

Usage fields
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

Billing rules
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

Limits & data boundaries
Not collected

No provider-priced inference cache contract verified. Client-side audio reuse is not provider prompt caching.

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

IBM documents this proprietary Watson speech service model or managed voice family. The service exposes recognition/voice selectors, not downloadable trained checkpoints. Closed-weight classification is inferred for the product model; public Granite Speech research releases and referenced open research implementations are separate.

Classification evidence (opens in a new tab)

Lifecycle dates

Hosted previous-generation service discontinued1 Aug 2023Source (opens in a new tab)

Sources reviewed