> For the complete documentation index, see [llms.txt](https://docs.bito.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bito.ai/ai-architect/installation/install-ai-architect-self-hosted/custom-llm-configuration.md).

# Custom LLM configuration

By default, AI Architect uses Bito's LLM, covered by your Bito API key. To bring your own key (BYOK), point AI Architect at a supported provider.

Configure a provider during installation, or at any time with:

```shellscript
bitoarch update-llm-config
```

## Supported providers

<table data-search="false"><thead><tr><th>Provider</th><th>Credentials required</th><th>Model</th></tr></thead><tbody><tr><td><a href="https://console.anthropic.com/settings/keys">Anthropic</a></td><td>API key</td><td>Provider default</td></tr><tr><td><a href="https://platform.openai.com/api-keys">OpenAI</a></td><td>API key</td><td>Provider default</td></tr><tr><td><a href="https://aistudio.google.com/apikey">Google Gemini</a></td><td>API key</td><td>Optional (workspace default if omitted)</td></tr><tr><td><a href="https://portal.azure.com">Azure AI</a></td><td>API key + endpoint URL</td><td>Deployment name</td></tr><tr><td><a href="https://console.aws.amazon.com/iam/">AWS Bedrock</a></td><td>Access key ID + secret + region</td><td>Provider default</td></tr><tr><td><a href="https://console.cloud.google.com/iam-admin/serviceaccounts">Google Vertex AI</a></td><td>Service-account JSON + project ID + region</td><td>Optional (workspace default if omitted)</td></tr><tr><td><a href="https://app.portkey.ai">Portkey</a></td><td>API token (+ optional gateway URL)</td><td>Required, as <code>@provider/model</code></td></tr></tbody></table>

* **Portkey is an exclusive gateway.** When configured, it routes all requests, and other providers are not used.
* Where the model is optional, leaving it blank uses the current workspace default managed by AI Architect.
* With an Anthropic key, indexing costs approximately **$1 per MB** of indexable code.

{% hint style="info" %}
**Model format notes.** Portkey requires the `@provider/model-name` format (for example `@openai/gpt-4o`). Azure AI uses your **deployment name** rather than a base model name. Vertex AI and Gemini accept an optional model; leave it blank to use the workspace default.
{% endhint %}

## Change the provider later

```shellscript
bitoarch update-llm-config   # reconfigure the provider or model
bitoarch show-config         # confirm the active configuration
```

Changing the provider or model does not re-index automatically. Run `bitoarch index-repos` if you want existing repositories re-indexed with the new model.


---

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