---
title: 'Model family, checkpoint, and version: keep the record precise'
slug: model-family-checkpoint-version
date: '2026-10-27'
description: How to avoid mixing facts from related model names, weights, releases,
  and hosted endpoints.
author_type: Organization
author_url: /editorial-method/
category: library
---
The useful unit of a model fact is a specific artifact or documented endpoint at a specific point in time. A family name alone is too broad for a performance or compatibility statement.

## Use a compact identity record

For a local checkpoint, save the repository, revision, weight variant, tokenizer or processor, runtime version, and configuration. For a hosted endpoint, save the provider, model identifier, documented version if available, request settings, and test date. Mark a provider-controlled version as unspecified when you cannot pin it.

## Avoid accidental transfers

A claim about one checkpoint does not automatically apply to a smaller variant, quantized copy, fine-tune, API endpoint, or later release. A shared name also does not establish that two organizations have identical responsibilities.

When sources disagree, retain both statements with their URLs and dates. Look for a release note or explicit owner clarification. Until that resolves the difference, label it as an open question rather than silently choosing the more favorable description.

## A useful change log

| Changed item | Follow-up |
| --- | --- |
| Weights or revision | Recheck task results and compatibility |
| Runtime or processor | Recheck output format and reproducibility |
| API alias | Record the date and check version documentation |
| Model card or license | Preserve the updated source and review affected claims |

Read [the model-card guide](/how-to-read-a-model-card/) for the fields behind this record. This is a documentation method, not a claim about any particular model.