# tinker_cookbook.preference.PreferenceModelBuilderFromChatRenderer

## *class* [**tinker_cookbook.preference.PreferenceModelBuilderFromChatRenderer**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/preference/types.py#L288)(*[PreferenceModelBuilder](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/preference/preferencemodelbuilder/index.md)*)

Builds a PreferenceModel that uses a chat renderer and a Tinker sampling client.

This is a `chz` dataclass that can be serialized and passed as configuration to training scripts.

```python
builder = PreferenceModelBuilderFromChatRenderer(
renderer_name="qwen3_5_disable_thinking",
model_name="Qwen/Qwen3.5-9B",
rm_weights_path="path/to/rm_weights",
)
pref_model = builder()
```

**Fields:**

- [**renderer_name**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/preference/types.py#L310) (*str*)
- [**model_name**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/preference/types.py#L311) (*str*)
- [**rm_weights_path**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/preference/types.py#L312) (*str*)
- [**base_url**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/preference/types.py#L313) (*str | None*, default: `None`)

### [**__call__**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/preference/types.py#L315)()

Create and return a [`PreferenceModelFromChatRenderer`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/preference/preferencemodelfromchatrenderer/index.md).

**Returns:** *[PreferenceModel](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/preference/preferencemodel/index.md)* – An initialized preference model backed by a Tinker sampling client.