EXAONE-4.5-33B
by LGAI-EXAONE
Enterprise VLM with SOTA document understanding and 256K context
LGAI-EXAONE/EXAONE-4.5-33Bmixpeek://image_extractor@v1/lgai_exaone_45_33b_v1Overview
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
Benchmarks
| Dataset | Metric | Score | Source |
|---|---|---|---|
| OmniDocBench v1.5 | Score | 81.2 | LG AI Research, 2026: arxiv,2604.08644 |
| ChartQAPro | Accuracy | 62.2 | LG AI Research, 2026: arxiv,2604.08644 |
| MMMU | Accuracy | 78.7 | LG AI Research, 2026: arxiv,2604.08644 |
Performance
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Specification
Research Paper
EXAONE 4.5 Technical Report
arxiv.orgBuild a pipeline with EXAONE-4.5-33B
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