IBM Granite Releases Granite Switch 4.1.1 with Updated ASR and Decision Adapter
IBM Granite introduced Granite Switch 4.1.1, a revision of its modular 30B language model. It brings new weights for the decision adapter and integrated multilingual speech transcription with Granite Speech 5.0 TurboCTC.
IBM Granite announced Granite Switch 4.1.1, a new revision of the modular 30-billion-parameter Granite Switch language model. The update changes the weights of the decision adapter and adds the Granite Speech 5.0 TurboCTC model to its integrated speech processing. According to the model card, the interface, prompt format, and output should remain identical to the previous 4.1 revision.
IBM Granite published the announcement on October 29, 2026, while the model repository lists October 27 as the release date for the revision. The checkpoint is available under the Apache 2.0 license, and the documentation lists deployment support through Hugging Face Transformers and vLLM.
What Granite Switch 4.1.1 Changes
Granite Switch uses a modular architecture with separately replaceable adapters. Version 4.1.1 updates the decision adapter, which is intended for decision-making tasks. IBM also claims improved performance on the Jev Decision Index, but independent verification of this claim was not available.
The other major change is the integration of Granite Speech 5.0 TurboCTC into speech processing. This component is intended to provide transcription with added punctuation and capitalization directly in the output. In practice, the model combines language and speech capabilities in a single package.
The Granite Switch model card lists support for English, French, German, Spanish, Portuguese, Italian, and Japanese. The same list of seven languages also appears in the card for the Granite Speech 5.0 TurboCTC ASR model used.
Discrepancy in the Number of Supported Languages
IBM Granite’s blog announcement claims support for ten languages. However, this figure does not match the Granite Switch model card or the speech model card, both of which list seven languages. Until IBM explains the discrepancy, the available documentation supports the figure of seven languages.
It has also not been independently confirmed what the practical difference will be between release 4.1.1 and version 4.1 in production deployments. IBM claims that the new revision is fully backward compatible, but verifying existing integrations will require testing by users.
What It Means for Developers
For Granite Switch users, the main relevant point is that they can update selected model capabilities without changing the declared interface or the input and output formats. Adding multilingual transcription could simplify the architecture of deployments that combine chat, decision-making tasks, and audio input on a single endpoint.
Other points to watch include independent benchmarks of the decision adapter, an explanation of the language discrepancy, and the release of the announced Adapter SDK along with guides for third-party adapters.
Sources
- Hugging Face Blog / IBM Granite – Confirms the announcement of version 4.1.1, its claimed backward compatibility, and the ASR and `decision` adapter updates.
- Hugging Face – Granite Switch 4.1 30B model card – Confirms revision 4.1.1, the repository release date, the changed adapter weights, supported backends, and the list of seven languages.
- Hugging Face – Granite Speech 5.0 TurboCTC model card – Confirms that the ASR model used supports seven specific languages and produces a punctuation-adjusted transcription.
Verified and updated: October 29, 2026 15:23
