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    Models/Captioning/LGAI-EXAONE/EXAONE-4.5-33B
    HFScene CaptioningEXAONE AI Model License 1.2 (non-commercial; commercial requires agreement)

    EXAONE-4.5-33B

    by LGAI-EXAONE

    Enterprise VLM with SOTA document understanding and 256K context

    Identifiers
    Model ID
    LGAI-EXAONE/EXAONE-4.5-33B
    Feature URI
    mixpeek://image_extractor@v1/lgai_exaone_45_33b_v1

    Overview

    EXAONE 4.5 is LG AI Research's first open-weight vision-language model, delivering best-in-class document understanding and STEM reasoning. With 33B parameters and 256K token context, it handles long documents, complex charts, and technical content with higher accuracy than GPT-5-mini on STEM benchmarks.

    On Mixpeek, EXAONE 4.5 powers high-accuracy scene captioning and document analysis for enterprise content. Its strong Korean language support fills a gap for Asia-Pacific content processing, and its 256K context handles entire multi-page documents in a single pass.

    Architecture

    31.7B LLM + 1.29B SigLIP-based vision encoder. 256K token context window. Dynamic resolution up to 1536px. Trained with multi-task curriculum on document understanding, chart comprehension, and general VQA. Supports English, Korean, and 30+ additional languages.

    Mixpeek SDK Integration

    // No extractor parameter takes a Hugging Face model id (checked against
    // GET /v1/discovery/extractors, which returns 13), so EXAONE-4.5-33B 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: { "multimodal-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

    • Outperforms GPT-5-mini on STEM benchmarks (avg 77.3 vs 73.5)
    • 256K token context for long document processing
    • SOTA document understanding (81.2 on OmniDocBench v1.5)
    • Strong chart comprehension (62.2 on ChartQAPro)
    • Korean language support for Asia-Pacific content

    Use Cases on Mixpeek

    Enterprise document analysis: process lengthy technical documents in one pass
    STEM content extraction: understand equations, diagrams, and technical figures
    Chart and infographic understanding: extract insights from visual data
    Korean content processing: caption and analyze Korean-language media

    Benchmarks

    DatasetMetricScoreSource
    OmniDocBench v1.5Score81.2LG AI Research, 2026: arxiv,2604.08644
    ChartQAProAccuracy62.2LG AI Research, 2026: arxiv,2604.08644
    MMMUAccuracy78.7LG AI Research, 2026: arxiv,2604.08644

    Performance

    Input SizeImage + Text (256K context)
    GPU Latency~80ms / page (A100)
    GPU Throughput~12 pages/sec (A100)
    GPU Memory~65 GB (or 4-bit: ~20 GB)

    Specification

    FrameworkHF
    OrganizationLGAI-EXAONE
    FeatureScene Captioning
    Outputtext
    Modalitiesvideo, image
    RetrieverSemantic Search
    Parameters33B
    LicenseEXAONE AI Model License 1.2 (non-commercial; commercial requires agreement)
    Downloads/mo976K

    Research Paper

    EXAONE 4.5 Technical Report

    arxiv.org

    Build a pipeline with EXAONE-4.5-33B

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