granite-speech-3.3

About

What granite-speech-3.3 is

Granite-speech-3.3-2b (revision 3.3.2) Model Summary: Granite-speech-3.3-2b is a compact and efficient speech-language model, specifically designed for automatic speech recognition (ASR) and automatic speech translation (AST). Granite-speech-3.3-2b uses a two-pass design, unlike integrated models that combine speech and language into a single pass. Initial calls to granite-speech-3.3-2b will transcribe audio files into text. To process the transcribed text using the underlying Granite language model, users must make a second call as each step must be explicitly initiated. The model was trained on a collection of public corpora comprising diverse datasets for ASR and AST as well as synthetic datasets tailored to support the speech translation task. Granite-speech-3.3-2b was trained by modality aligning granite-3.3-2b-instruct (https://huggingface.co/ibm-granite/granite-3.3-2b-instruct) to speech on publicly available open source corpora containing audio inputs and text targets. Compared to the initial release, revision 3.3.2 supports multilingual speech inputs in English, French, German, Spanish and Portuguese, provides transcription accuracy improvements for English ASR by using a deeper acoustic encoder and additional training data. Evaluations: We evaluated granite-speech-3.3-2b revision 3.3.2 alongside granite-speech-3.3-8b (https://huggingface.co/ibm-granite/granite-speech-3.3-8b) and other speech-language models in the less than 8b parameter range as well as dedicated ASR and AST systems on standard benchmarks. The evaluation spanned multiple public benchmarks, with particular emphasis on English ASR tasks while also including multilingual ASR and AST for X-En and En-X translations. Release Date: June 19, 2025 License: Apache 2.0 Supported Languages: English, French, German, Spanish, Portuguese Intended Use: The model is intended to be used in enterprise applications that involve processing of speech inputs. In particular, the model is well-suited for English, French, German, Spanish and Portuguese speech-to-text and speech translations to and from English for the same languages plus English-to-Japanese and English-to-Mandarin. The model can also be used fo

Summarised from the published model card. Read the full card on the HuggingFace links below.

Specifications

What it is

How it works

How audio & music work

Variants

Sizes & precisions

Open weights ship in several sizes and precisions. One page, all the variants — pick the one that fits your GPU. VRAM figures are estimates from model size.

Using it via the API

Call it like any OpenAI endpoint

Once AxForge deploys granite-speech-3-3 for you, it answers on the OpenAI-compatible API — the same base URL and keys as every other model. (granite-speech-3-3 below is illustrative; you get the exact model name on deployment.)

$ curl -sS https://api.axforge.ai/v1/audio/transcriptions \
  -H "Authorization: Bearer $AXFORGE_API_KEY" \
  -F model="granite-speech-3-3" -F file=@audio.mp3

Details

Languages, data & research

Papers

Licence

Open weights

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Weights & code

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