> ## Documentation Index
> Fetch the complete documentation index at: https://docs.langchain.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Manage model configurations

> Manage model configurations and control their availability across LangSmith features.

Model configurations define the model and parameters that LangSmith features use when calling an AI provider. A single shared library of configurations spans your entire [workspace](/langsmith/administration-overview#workspaces), so any configuration you create is available across the following features without duplication:

* [**Playground**](/langsmith/prompt-engineering-concepts)
* [**Evaluators**](/langsmith/evaluation)
* [**Fleet**](/langsmith/fleet/index)
* [**Polly**](/langsmith/polly)
* [**Insights**](/langsmith/insights)

[Workspace admins](/langsmith/rbac#workspace-admin) can create, edit, and delete configurations and control which providers and models are available per feature. Non-admin members can view configurations but cannot modify them.

## Feature Access

The **Feature Access** table controls provider and model availability independently for each LangSmith feature.

| **Feature**              | **Model selection experience**                                                                                                                                   |
| ------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Playground               | Full model controls—view and adjust all parameters. No built-in models; relies on workspace configurations.                                                      |
| Evaluators               | Full model controls—view and adjust all parameters. No built-in models; relies on workspace configurations.                                                      |
| Fleet                    | Choose from a curated list by default. You can also add custom workspace configurations.                                                                         |
| Polly                    | Choose from a curated list by default. You can also add custom workspace configurations.                                                                         |
| Insights (Thinking)      | Model used for deep analysis. Choose from a curated list with provider recommendations by default. You can also add custom workspace configurations.             |
| Insights (Summarization) | Model used for lightweight summarization. Choose from a curated list with provider recommendations by default. You can also add custom workspace configurations. |

All features support custom workspace configurations, so you can use any provider or model—even for features that show a curated list by default.

<Note>
  **Insights** uses two separate rows—one for analysis and one for summarization. The UI displays a warning if you select incompatible providers or non-recommended models for either row.
</Note>

### Configure feature access

To configure feature access in the [UI](https://smith.langchain.com?utm_source=docs\&utm_medium=cta\&utm_campaign=langsmith-signup\&utm_content=langsmith-model-configurations):

1. Navigate to **Settings** > **Model configurations**.
2. In the **Feature Access** table, find the feature you want to configure.
3. Click **Enabled Providers** and toggle providers on or off for that feature.
4. Click **Available Models** and select which models users can choose from.
5. Use the **Default Model** dropdown to set the model preselected when users open the feature.

## Configurations

The **Configurations** table is a shared library of named model configurations for your workspace. Configurations you create in LangSmith (including from the [Playground](/langsmith/managing-model-configurations)) appear here and you can reuse them across all features.

### Create a configuration

1. Navigate to **Settings** > **Model configurations**.
2. Under **Configurations**, click **+ Create**.
3. Select a **Provider** and **Model**.
4. Enter the **API Key Name**—the name of the secret in your workspace that stores the provider API key.
5. Adjust parameters as needed. Parameters are grouped into sections for:

   * **Standard sampling settings**: temperature, top P, top K, presence penalty, frequency penalty, max output tokens
   * **Reasoning**: reasoning effort, service tier
   * **Provider config**: provider API, base URL
   * **Options**: stop sequences, seed, JSON mode, extra headers, requests per second, extra parameters

   Available parameters vary by provider—refer to your provider's documentation for details.
6. Click **Save**.

### Edit a configuration

1. In the **Configurations** table, click the overflow menu <Icon icon="dots-vertical" iconType="regular" /> next to the configuration.
2. Select **Edit**.
3. Update the configuration and click **Save**.

### Delete a configuration

1. In the **Configurations** table, click the overflow menu <Icon icon="dots-vertical" iconType="regular" /> next to the configuration.
2. Select <Icon icon="trash" iconType="regular" /> **Delete** and confirm.

***

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