# Model Configuration Nexu supports two model integration paths: **Nexu Official** (managed models, sign in and go) and **BYOK** (Bring Your Own Key). You can switch between them at any time without affecting existing conversations or channel connections. ## Step 1: Open Settings Click **Settings** in the left sidebar of the nexu client to open the AI Model Providers configuration page.  ## Step 2: Choose an Integration Mode ### Option A: Nexu Official Select **Nexu Official** from the provider list on the left, then click **Sign in to Nexu** to authenticate. Once signed in, no API key is needed. Managed models become available immediately.  ### Option B: Bring Your Own Key Select **Anthropic**, **OpenAI**, **Google AI**, or another provider from the list: 1. Paste your key into the **API Key** field. 2. Modify **API Proxy URL** if you need a custom proxy. 3. Click **Save**. nexu will verify the key and load the available model list automatically.  ## Step 3: Select the Active Model After a successful connection, use the **Nexu Bot Model** dropdown at the top of the Settings page to choose the model your Agent should use.  ## Supported Providers | Provider | Default Base URL | Key Format | | --- | --- | --- | | Anthropic | `https://api.anthropic.com` | `sk-ant-...` | | OpenAI | `https://api.openai.com/v1` | `sk-...` | | Google AI | `https://generativelanguage.googleapis.com/v1beta` | `AIza...` | | xAI | `https://api.x.ai/v1` | `xai-...` | | Custom | Your OpenAI-compatible endpoint | Depends on the provider | ## Best Practices - Use least-privilege API keys whenever possible. - Never expose keys in screenshots, tickets, or git history. - When adding a BYOK provider, verify connectivity before saving. - Use **Custom** if you need a proxy, self-hosted gateway, or another OpenAI-compatible inference service. ## FAQ **Q: Which mode should I start with?** Nexu Official is the easiest place to start: just sign in and begin using managed models. **Q: Can I configure multiple BYOK providers at the same time?** Yes. Providers can be configured independently, and you can switch between them through the model selector. **Q: Are API keys uploaded to nexu servers?** No. API keys are stored on your local device and are not uploaded to nexu servers.