# What Is Checkpoint?

> A checkpoint is a snapshot of model state saved to storage at intervals during training, used for failure recovery and for keeping results. Training usually pauses while it is written, so the slower the write, the longer the GPUs sit idle.

URL: https://vuke.top/en/glossary/checkpoint · Updated November 12, 2026

A checkpoint is a snapshot of model state saved to storage at intervals during training, used for failure recovery and for keeping results. Training usually pauses while it is written, so the slower the write, the longer the GPUs sit idle.

## In the measurements

In measurements, saving a 65.6 GB full-model snapshot takes 94 s instead of 178 s (1.9×) [R1](https://vuke.top/en/evidence/R1).

Source: [R1](https://vuke.top/en/evidence/R1)