LO
ENT-00001417 · AI Model

Longformer

Longformer is a AI model associated with Allen Institute for AI, classified in LXKeys.world as Foundation / Language Model.

Level IV ConnectedActiveDocumented
Human record

Overview

Longformer is a long-document transformer model associated with Allen Institute for AI. The entity is included because it represents a distinct public model, architecture, benchmark, dataset or AI research system with an identifiable source base and documented role.

Timeline

  1. 2020Initial model publication or release

    Longformer entered the documented public record in 2020. This event is retained at the precision supported by the Entry’s reviewed source history.

Capabilities

Documented AI capabilityResearch or product source anchorModel or system lineageRelationship mapping

Known limitations

Capabilities depend on version, training data, deployment configuration and evaluation setting.The record documents public identity and source context rather than private implementation details.
Technical and structured detail

Technical description

Structured LXKeys.world registry record for Longformer. Entity type: AI Model; classification: Foundation / Language Model; creator/organization context: Allen Institute for AI. Canonical source anchor: https://github.com/allenai/longformer. The record tracks source authority, first public appearance, timeline, capabilities, limitations, registry status and graph relationships. Automatic refresh is limited to sources explicitly classified as OFFICIAL and enabled for updates; documentary and research references remain non-authoritative unless reviewed.

Controlled tags

Foundation ModelDocumented EntityContemporaryBatch 03 Candidate
Relationship graph

Longformer

Open in full graph
Longformer
Created or maintained byOutgoing
Allen Institute for AI

Longformer is associated with Allen Institute for AI.

Machine readable layer

Structured entry data for human tools, AI systems and machine clients.

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    "creator": "Allen Institute for AI",
    "url": "https://lxkeys.world/entry.php?id=ENT-00001417&lang=en",
    "sameAs": "https://github.com/allenai/longformer",
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        "originContext": "AI model, architecture and research record",
        "firstPublicAppearance": "2020",
        "currentStatus": "Active",
        "documentationStatus": "Documented",
        "documentationIndex": {
            "total": 74,
            "documentation": 25,
            "evidence": 13,
            "structure": 25,
            "relationships": 11,
            "level": "Level IV Connected"
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            "created_utc": "2026-06-16T23:59:14+00:00",
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