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IBMGranite Speech

Granite Speech 4.1 2B

Granite Speech 4.1 2B remains a downloadable and hosted speech-language model. It supports recognition and bidirectional translation between English and French, German, Spanish, Portuguese or Japanese.

Model design and capabilities

Its dual-head CTC encoder has character and BPE outputs. Frame importance sampling focuses processing on informative audio. Prompt options control punctuation and capitalization, while keyword lists guide recognition. The 2B name describes the whole model, rather than only the language backbone.Granite Speech 4.1 2B model card

Practical use

Practical guidance. Keep this release as a comparison point when migrating an existing speech workflow to 5.0. Evaluate names, punctuation and translation direction with the exact same audio. Do not infer speaker labeling or word timestamps from the capabilities of the separate Plus variant.

Specifications & access

Granite Speech 4.1 2B specifications
DetailValue and conditions
AccessAPI, Downloadable, Provider product
Model identifiersibm-granite/granite-speech-4.1-2b
LicenseApache 2.0Granite Speech 4.1 2B model card
Training audio174,000 hours, with additional synthetic data.Granite Speech 4.1 2B model card
AncestryAn intermediate Granite 4.0 1B Base checkpoint aligned to speech.Granite Speech 4.1 2B model card
Hosted accesswatsonx: deploy on demand.IBM watsonx.ai foundation model library

Related models

  • Granite Speech 5.0 2B

    IBM ยท Granite Speech

    An audio-to-text model with a Granite 4.0 1B Base backbone for speech recognition in six languages.

    Launch date Downloadable