# tinker_cookbook.distillation.PromptOnlyDatasetBuilder

## *class* [**tinker_cookbook.distillation.PromptOnlyDatasetBuilder**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L222)(*[RLDatasetBuilder](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/rl/rldatasetbuilder/index.md)*)

Builder for prompt-only datasets.

**Fields:**

- [**dataset_name**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L225) (*str*) – e.g., "deepmath"
- [**groups_per_batch**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L226) (*int*)
- [**group_size**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L227) (*int*)
- [**model_name_for_tokenizer**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L228) (*str*)
- [**renderer_name**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L229) (*str*)
- [**convo_prefix**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L230) (*list\[renderers.[Message](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/renderers/message/index.md)\] | None*, default: `None`)
- [**max_prompt_tokens**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/distillation/datasets.py#L231) (*int | None*, default: `1024`) – Maximum tokens per prompt (None = no truncation)