When was Granite Speech 4.1 2B Plus released?

Name: Granite Speech 4.1 2B Plus
Author: IBM Research

Granite Speech 4.1 2B Plus was released on 2026-04-29.

Granite Speech 4.1 2B Plus

granite-speech-4.1-2b-plus

Open SourceMultimodal

About

IBM Granite Speech 4.1 2B Plus is an enhanced speech-to-text model supporting ASR (automatic speech recognition), speaker-attributed ASR with speaker labels, and word-level timestamps. Extends the base Granite Speech 4.1 2B with richer transcription features including keyword list biasing (KWB) and incremental decoding. Achieves 5.71% average WER on the HuggingFace Open ASR Leaderboard. Supports English, French, German, Spanish, and Portuguese. Apache 2.0 license.

Capabilities

VisionMultimodalReasoningFunction CallingTool UseStructured OutputsCode Execution

Rankings

Best Open Source LLMs Best Multimodal / Vision LLMs Best Small Language Models (SLMs)Cheapest LLM APIs Best LLM APIs Best Free LLMs Best LLMs for Writing Best LLMs for Marketing

Specifications

FamilyGranite 4.1

Released2026-04-29

Parameters2B

Specializationspeech-recognition

Created by

IBM Research

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Founded 1945

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