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v2026.1714 entries · CC-BY 4.0
Dictionary termTrack AStablev2026.2

Model versioning

The practice of identifying a specific revision of an AI model by name, version number, release date, or content hash, sufficient to uniquely distinguish it from earlier or later revisions that may behave differently on the same input.

ByCASRAI Editorial Board
· Last updated 21 May 2026

Examples

Worked examples

  • Is an instance

    Reporting 'gpt-4-0613 (OpenAI, accessed 2024-03-15)' rather than just 'GPT-4'

Counter-examples

Looks similar, but isn't

  • Not an instance

    Reporting only 'ChatGPT' without date or version is insufficient for reproducibility

Editorial commentary

Closed-API models can be silently updated by their providers; the same nominal model name (e.g., ‘gpt-4’) can refer to different underlying weights at different times. For scholarly reproducibility, the version (e.g., ‘gpt-4-0613’), the access date, and where possible the provider’s snapshot identifier should be recorded.

References

  • OpenAI API model versioning documentation (2024)
  • Anthropic model versioning guidance (2024)

Also known as

Model snapshot · Model release

Machine-readable encodings

Use in your systems

JATS XML <role> element
xml
<role vocab="credit"
      vocab-identifier="https://casrai.org/dictionary/"
      vocab-term="Model versioning"
      vocab-term-identifier="https://casrai.org/dictionary/term/model-versioning" />
Schema.org DefinedTerm (JSON-LD)
json
{
  "@context": "https://schema.org",
  "@type": "DefinedTerm",
  "name": "Model versioning",
  "identifier": "https://casrai.org/dictionary/term/model-versioning",
  "description": "The practice of identifying a specific revision of an AI model by name, version number, release date, or content hash, sufficient to uniquely distinguish it from earlier or later revisions that may behave differently on the same input.",
  "inDefinedTermSet": "https://casrai.org/dictionary/domain/generative-ai-use-and-disclosure/",
  "url": "https://casrai.org/dictionary/term/model-versioning",
  "sameAs": [
    "Model snapshot",
    "Model release"
  ],
  "license": "https://creativecommons.org/licenses/by/4.0/"
}

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