# tinker_cookbook.checkpoint_utils

| Class                                                                                                                           | Description                                               |
| ------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------- |
| [`CheckpointRecord`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/checkpoint_utils/checkpointrecord/index.md) | A single checkpoint record stored in `checkpoints.jsonl`. |

| Function                                                                                                                                    | Description                                                                      |
| ------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
| [`load_checkpoints_file()`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/checkpoint_utils/load_checkpoints_file/index.md) | Load checkpoint records from a JSONL file.                                       |
| [`get_last_checkpoint()`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/checkpoint_utils/get_last_checkpoint/index.md)     | Get the last checkpoint from the checkpoints.jsonl file in the specified log dir |
| [`save_checkpoint()`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/checkpoint_utils/save_checkpoint/index.md)             | Save model checkpoint (synchronous wrapper around save_checkpoint_async).        |