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    Models/Captioning/moonshotai/Kimi-VL-A3B-Thinking-2506
    HFScene CaptioningMIT

    Kimi-VL-A3B-Thinking-2506

    by moonshotai

    Efficient MoE reasoning VLM with 2.8B activated parameters and SOTA video understanding

    10.3Kdl/month
    16B total / 2.8B activeparams
    Identifiers
    Model ID
    moonshotai/Kimi-VL-A3B-Thinking-2506
    Feature URI
    mixpeek://image_extractor@v1/moonshotai_kimi_vl_a3b_v1

    Overview

    Kimi-VL-A3B-Thinking is Moonshot AI's efficient Mixture-of-Experts vision-language model that activates only 2.8B of its 16B total parameters per forward pass. It achieves state-of-the-art video understanding among open-source models while supporting native-resolution images up to 3.2 megapixels and 131K token context.

    On Mixpeek, Kimi-VL powers high-quality scene captioning, visual reasoning, and OCR extraction at a fraction of the compute cost of dense 7B+ models. Its MoE architecture makes it especially cost-effective for batch processing large video libraries.

    Architecture

    Mixture-of-Experts VLM: MoonViT vision encoder (native-resolution, up to 3.2M pixels) + MLP projector + Moonlight-16B-A3B MoE language decoder. 16B total / ~2.8B activated parameters. 131K max context. Long-CoT SFT + reinforcement learning with 20% reduced thinking tokens.

    Mixpeek SDK Integration

    // No extractor parameter takes a Hugging Face model id (checked against
    // GET /v1/discovery/extractors, which returns 13), so Kimi-VL-A3B-Thinking-2506 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

    • SOTA video understanding for open-source (65.2 on VideoMMMU)
    • Only 2.8B activated parameters (MoE efficiency)
    • Native high-resolution image support up to 3.2 megapixels
    • 131K token context for long documents
    • Strong OCR (869 on OCRBench) and GUI grounding (91.4 on ScreenSpot-V2)

    Use Cases on Mixpeek

    Video scene captioning at scale: describe every scene in large video archives
    Document understanding: extract structured data from scanned documents and forms
    Visual reasoning: answer complex questions about image and video content
    GUI and screenshot analysis: extract information from application interfaces

    Benchmarks

    DatasetMetricScoreSource
    VideoMMMUAccuracy65.2Moonshot AI, 2025: arxiv,2504.07491
    MMMUPass@164.0Moonshot AI, 2025: arxiv,2504.07491
    MathVisionPass@156.9Moonshot AI, 2025: arxiv,2504.07491

    Performance

    Input SizeUp to 3.2M pixels (native resolution)
    GPU Latency~45ms / image (A100)
    GPU Throughput~22 images/sec (A100)
    GPU Memory~8 GB (MoE sparse activation)

    Specification

    FrameworkHF
    Organizationmoonshotai
    FeatureScene Captioning
    Outputtext
    Modalitiesvideo, image
    RetrieverSemantic Search
    Parameters16B total / 2.8B active
    LicenseMIT
    Downloads/mo10.3K

    Research Paper

    Kimi-VL Technical Report

    arxiv.org

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