# merge_effort_model_params

> **Function** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/reasoning_effort/merge_effort_model_params)

Merge effort params into existing per-session model params.

## Signature

```python
merge_effort_model_params(
    existing: dict[str, Any] | None,
    effort_params: dict[str, Any],
) -> dict[str, Any]
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `existing` | `dict[str, Any] \| None` | Yes | Current per-session model params. |
| `effort_params` | `dict[str, Any]` | Yes | Params returned by `model_params_for_effort`. |

## Returns

`dict[str, Any]`

A new merged dictionary preserving unrelated nested config objects.

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[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/e14e0adcbe78565ed3650e7f24b2a775d5437d25/libs/code/deepagents_code/reasoning_effort.py#L571)