ENT-00001138 · Dataset

C4

C4 is a colossal clean crawled corpus associated with Google Research.

Level IV — ConnectedActiveStructured

Human readable record

Overview

C4 is a documented colossal clean crawled corpus used in artificial-intelligence research, evaluation or dataset construction. Its record captures the task context, public source, evaluation role and relationships to models, agents or research systems that rely on comparable measurements.

Timeline

2020C4 public release or documentation
C4 appears in public documentation as a colossal clean crawled corpus associated with Google Research.

Capabilities

Evaluation referenceComparable measurementResearch reproducibilityModel documentation support

Known limitations

Benchmark interpretation depends on task design, data quality and contamination controls.Scores should not be treated as a complete measure of intelligence.

Technical and registry detail

Technical description

Structured reference record for C4. The technical layer captures source URL, creator, first-public year, evaluation or dataset role, measurable task family and relationships to model testing, retrieval, safety, coding, reasoning or multimodal assessment.

Controlled tags

DatasetEvaluationDocumentationContemporaryBatch 03 Candidate

Relationship graph

Created or maintained byGoogle Research

C4 is associated with Google Research.

Machine readable layer

Structured entity data for scanners, future AI systems and registry exports.

{
    "@context": "https://schema.org",
    "@type": "Thing",
    "identifier": "ENT-00001138",
    "name": "C4",
    "alternateName": [],
    "additionalType": "Dataset",
    "description": "C4 is a colossal clean crawled corpus associated with Google Research.",
    "creator": "Google Research",
    "url": "entity.php?id=ENT-00001138",
    "sameAs": "https://www.tensorflow.org/datasets/catalog/c4",
    "lxkeysWorld": {
        "classification": "Colossal Clean Crawled Corpus",
        "organization": "Google Research",
        "originContext": "AI evaluation and dataset record",
        "firstPublicAppearance": "2020",
        "currentStatus": "Active",
        "registryStatus": "Structured",
        "spatiumIndex": {
            "total": 74,
            "documentation": 25,
            "evidence": 13,
            "structure": 25,
            "relationships": 11,
            "level": "Level IV — Connected"
        },
        "lxCalendarium": {
            "start_date_utc": "2023-04-01",
            "created_utc": "2026-06-16T23:59:14+00:00",
            "created_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3",
            "updated_utc": "2026-06-16T23:59:14+00:00",
            "updated_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3",
            "reviewed_utc": "2026-06-16T23:59:14+00:00",
            "reviewed_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3"
        },
        "capabilities": [
            "Evaluation reference",
            "Comparable measurement",
            "Research reproducibility",
            "Model documentation support"
        ],
        "limitations": [
            "Benchmark interpretation depends on task design, data quality and contamination controls.",
            "Scores should not be treated as a complete measure of intelligence."
        ],
        "tags": [
            "Dataset",
            "Evaluation",
            "Documentation",
            "Contemporary",
            "Batch 03 Candidate"
        ],
        "timeline": [
            {
                "date": "2020",
                "title": "C4 public release or documentation",
                "description": "C4 appears in public documentation as a colossal clean crawled corpus associated with Google Research."
            }
        ],
        "relationships": [
            {
                "target": "Google Research",
                "type": "Created or maintained by",
                "description": "C4 is associated with Google Research.",
                "evidence_level": "documentary"
            }
        ],
        "sources": [
            {
                "label": "C4 public reference",
                "url": "https://www.tensorflow.org/datasets/catalog/c4",
                "source_type": "Primary or Research Source",
                "verification_status": "verified"
            }
        ]
    }
}

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