# tinker.types.Checkpoint

## *class* [**tinker.types.Checkpoint**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L11)(*[BaseModel](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/_models.py#L88)*)

**Fields:**

- [**checkpoint_id**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L12) (*str*) – The checkpoint ID
- [**checkpoint_type**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L15) (*[CheckpointType](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L8)*) – The type of checkpoint (training or sampler)
- [**time**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L18) (*datetime*) – The time when the checkpoint was created
- [**tinker_path**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L21) (*str*) – The tinker path to the checkpoint
- [**size_bytes**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L24) (*int | None*) – The size of the checkpoint in bytes
- [**public**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L27) (*bool*) – Whether the checkpoint is publicly accessible
- [**expires_at**](https://github.com/thinking-machines-lab/tinker/blob/main/src/tinker/types/checkpoint.py#L30) (*datetime | None*) – When this checkpoint expires (None = never expires)

## Referenced by

- [tinker.types.CheckpointsListResponse](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/types/checkpointslistresponse/index.md)
- [tinker.types.TrainingRun](https://tinker-docs.thinkingmachines.ai/tinker/api-reference/types/trainingrun/index.md)