> ## Documentation index
> Fetch the complete documentation index at: https://dify-docs.docs7.io/llms.txt
> Ask it with GET https://dify-docs.docs7.io/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# Model Providers

> Add model providers to your workspace so your apps can use LLMs, embedding models, and other AI services

Every Dify app needs at least one model provider. Install a provider, add your API key, and all apps in the workspace can use its models.

<Warning>
API keys grant workspace-wide model access and trigger direct billing through each provider's account. Only the workspace owner and admins can manage providers.
</Warning>

## Add a Provider

1. In **Integrations** > **Model Provider**, browse the **Install model providers** section or visit the [Marketplace](https://marketplace.dify.ai/) for more options.

2. After installing, click **Setup** on the provider card and enter your API key (and any other required credentials, such as a custom endpoint URL or organization ID). Dify validates the credentials before making the provider available.

## Add a Custom Model

A provider's models are ready as soon as you connect it, so you only add one by hand when the model you need isn't listed, such as a brand-new or fine-tuned model.

Click **Add Model** on the provider's card, then give the model a name and its credentials. Providers that serve only a fixed set of models don't offer this option.

<Info>
If the model you add matches the name and type of an existing one, Dify attaches the new key to that model instead of creating a duplicate.
</Info>

## Manage Your Keys

Add more than one key to a provider when you want to keep development and production apart or spread usage across several accounts.

- For a provider's own models, click **Configure** on its card to manage the keys they share.
  <Frame>
  ![Manage Credentials for a Provider's Models](/images/use-dify/workspace/predefined-model-credential.png)
  </Frame>
- For a custom model you added, click **Configure** on that model to manage its own keys.
    <Columns cols={2}>
      <Frame>
      ![Custom Model Configuration](/images/use-dify/workspace/custom-model-config.png)
      </Frame>
      <Frame>
      ![Custom Model Credentials](/images/use-dify/workspace/custom-model-credential.png)
      </Frame>
    </Columns>

    <Warning>
    A custom model relies on its own keys. Deleting its only key removes the model too.
    </Warning>

    To view every custom model's keys in one place, click **Manage Credentials** on the provider card.

    <Frame>
      ![Manage Credentials for All Custom Models](/images/use-dify/workspace/custom-model-credential-list.png)
    </Frame>

    Keys stay here even after the custom model is removed, so you can re-add the model later without re-entering its keys.

    <Frame>
      ![Re-add a Removed Model](/images/use-dify/workspace/removed-custom-model-re-add.png)
    </Frame>

## Choose the Models Apps Use by Default

Apps and nodes that don't pick a model fall back to your workspace defaults. Click **Default Models** at the top-right corner to set one for each job:

- **System Reasoning Model**: the default for general LLM tasks.
- **Embedding Model**: indexes and retrieves knowledge base content.
- **Rerank Model**: reorders retrieval results by relevance.
- **Speech-to-Text Model**: turns audio into text.
- **Text-to-Speech Model**: turns text into audio.