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

# Which Key is Used Where

> How OCCode decides which API key and model to use for each interaction.

## How key routing works

When your agent processes a request, OCCode follows a priority chain to decide which model and API key to use:

***

## Routing table

| Scenario                                   | Key used                     | Billed to              |
| ------------------------------------------ | ---------------------------- | ---------------------- |
| No custom keys configured                  | OCC Legacy key               | Your OCCode credits    |
| Anthropic key added, Claude set as default | Your Anthropic key           | Your Anthropic account |
| OpenAI key added for image generation      | Your OpenAI key (for images) | Your OpenAI account    |
| Custom key fails or is invalid             | Falls back to OCC Legacy     | Your OCCode credits    |
| Specific agent set to use Gemini           | Your Google key              | Your Google account    |

***

## Key types

<CardGroup cols={2}>
  <Card title="Inference keys" icon="brain">
    Used for text generation — conversations, tasks, reasoning. This is your main AI model key (Anthropic, OpenAI, Google, etc.).
  </Card>

  <Card title="Image generation keys" icon="image">
    Used for generating images. Typically an OpenAI (DALL-E) or other image model key.
  </Card>
</CardGroup>

***

## Fallback behavior

OCCode is designed to **never leave you stuck**:

1. If your primary model is unavailable → tries your fallback model
2. If your fallback model fails → uses OCC Legacy
3. If credits are depleted → prompts you to top up or add a BYOK key

<Info>You can configure fallback chains in the **Models** app — set a primary model and one or more fallbacks.</Info>

***

## Checking which key is active

In the **Models** app, each configured provider shows:

* ✅ **Active** — currently being used
* ⏸️ **Fallback** — will be used if the primary fails
* ❌ **Invalid** — key needs to be updated