---
title: Custom
description: Custom provider for third-party APIs and local models
---

For models accessed via OpenAI-compatible APIs, such as:

- **Third-party API proxies**: Use a unified API Base to call multiple models
- **Local models**: Models deployed locally via Ollama, vLLM, LocalAI, etc.
- **Private deployments**: Self-hosted model services within your organization

<Note>
  Unlike the `openai` provider, switching models under the Custom provider will not auto-switch the provider type. Your custom API address is always preserved.
</Note>

## Configuration

### Third-party API Proxy

```json
{
  "bot_type": "custom",
  "model": "deepseek-v4-flash",
  "custom_api_key": "YOUR_API_KEY",
  "custom_api_base": "https://{your-proxy.com}/v1"
}
```

| Parameter | Description |
| --- | --- |
| `bot_type` | Must be set to `custom` |
| `model` | Model name, any model supported by your proxy service |
| `custom_api_key` | API key provided by your proxy service |
| `custom_api_base` | API base URL, must be OpenAI-compatible |

### Local Models

Local models typically don't require an API key — just set the API base:

```json
{
  "bot_type": "custom",
  "model": "qwen3.5:27b",
  "custom_api_base": "http://localhost:11434/v1"
}
```

Common local deployment tools and their default addresses:

| Tool | Default API Base |
| --- | --- |
| [Ollama](https://ollama.com) | `http://localhost:11434/v1` |
| [vLLM](https://docs.vllm.ai) | `http://localhost:8000/v1` |
| [LocalAI](https://localai.io) | `http://localhost:8080/v1` |

## Switching Models

Under the Custom provider, switching models only changes `model` without affecting `bot_type` or the API address:

```
/config model qwen3.5:27b
```