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    Models/Speech & Audio/ibm-granite/granite-speech-4.1-2b
    HFTranscriptionapache-2.0

    granite-speech-4.1-2b

    by ibm-granite

    Compact 2B multilingual ASR and speech translation with Conformer encoder and 5.33 mean WER

    251Kdl/month
    157likes
    2.3Bparams
    Identifiers
    Model ID
    ibm-granite/granite-speech-4.1-2b
    Feature URI
    mixpeek://transcription@v1/ibm_granite_speech_41_2b_v1

    Overview

    Granite Speech 4.1 2B is IBM's compact speech-language model designed for multilingual automatic speech recognition (ASR) and bidirectional automatic speech translation (AST) across English, French, German, Spanish, Portuguese, and Japanese. It combines a 16-layer Conformer encoder trained with dual-head CTC for character and BPE units with a 2-layer window Q-Former that downsamples acoustic embeddings by 10x, producing a 10Hz embedding rate for the language model.

    Trained on 174,000 hours of public audio corpora plus synthetic datasets for Japanese ASR and keyword-biased recognition, the model achieves a mean WER of 5.33 on the Open ASR Leaderboard. On Mixpeek, it powers multilingual audio transcription for video and podcast content, enabling full-text search across spoken content in six languages.

    Architecture

    16-layer Conformer encoder with dual-head CTC (character + BPE). 2-layer window Q-Former downsamples acoustic embeddings by 10x to 10Hz. Trained on 174K hours of audio. Encoder training: 26 days on 8x H100; projector fine-tuning: 4 days.

    Mixpeek SDK Integration

    // No extractor parameter takes a Hugging Face model id (checked against
    // GET /v1/discovery/extractors, which returns 13), so granite-speech-4.1-2b runs
    // on your side and the output is upserted through POST
    // /v1/namespaces/{namespace_id}/documents/upsert. On Enterprise the other
    // path is to upload the weights instead: POST /v1/namespaces/{id}/models
    // accepts the huggingface format and a custom plugin loads them.
    const res = await fetch(
      "https://api.mixpeek.com/v1/namespaces/ns_your_namespace/documents/upsert",
      {
        method: "POST",
        headers: {
          Authorization: "Bearer API_KEY",
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          collection_id: "col_your_collection",
          documents: [
            {
              document_id: "asset-00412",
              // The model produces text, so it lands in payload. Give the
              // collection a text vector index and embed that text to make it
              // searchable rather than only filterable.
              payload: { extracted_text: modelOutput, source_key: "archive/2026/asset-00412" },
              vectors: { "text-embedding": embeddingOfModelOutput },
            },
          ],
        }),
      },
    );
    
    // Managed alternative, if this exact model is not the requirement:
    // universal_extractor@v1 runs google/gemini-embedding-2
    // (3072-d) over a bucket, with no inference of your own.

    Capabilities

    • 6-language ASR: English, French, German, Spanish, Portuguese, Japanese
    • Bidirectional automatic speech translation
    • Mean WER 5.33 on Open ASR Leaderboard
    • Keyword-biased ASR for domain-specific terminology
    • Compact 2B parameters for cost-efficient deployment

    Use Cases on Mixpeek

    Multilingual video transcription: index spoken content in six languages for search
    Podcast and webinar processing: generate searchable transcripts at scale
    Speech translation pipelines: transcribe and translate audio content across language pairs

    Benchmarks

    DatasetMetricScoreSource
    Open ASR LeaderboardMean WER5.33IBM, April 2026: Model Card
    LibriSpeech (clean)WER1.33%IBM, April 2026: Model Card
    LibriSpeech (other)WER2.50%IBM, April 2026: Model Card

    Performance

    Input SizeAudio (any length, chunked internally)
    GPU Latency~0.3x real-time (A100)
    GPU Throughput~3.3x real-time (A100)
    GPU Memory~4.5 GB

    Specification

    FrameworkHF
    Organizationibm-granite
    FeatureTranscription
    Outputtext + timestamps
    Modalitiesvideo, audio
    RetrieverTranscript Search
    Parameters2.3B
    Licenseapache-2.0
    Downloads/mo251K
    Likes157

    Research Paper

    Granite Speech 4.1

    arxiv.org

    Build a pipeline with granite-speech-4.1-2b

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