---
title: Custom
description: Custom vendor configuration for third-party API proxies and local models
---

For model services accessed via the OpenAI-compatible protocol or locally deployed models, such as:

- **Third-party API proxies**: call multiple models through a unified API base
- **Local models**: models deployed locally with tools like Ollama, vLLM, LocalAI
- **Private deployments**: model services deployed inside an enterprise

<Note>
  Difference from the `openai` vendor: when a custom vendor is selected, switching models via `/config model` does not automatically switch the vendor type — the custom API address is always used.
</Note>

## Text Chat

### Third-party API proxy

```json
{
  "bot_type": "custom",
  "model": "",
  "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 name supported by the proxy service |
| `custom_api_key` | API key provided by the proxy service |
| `custom_api_base` | API endpoint provided by the proxy service; must be OpenAI-compatible |

### Local models

Local models usually do not require an API key — only the API base needs to be filled in:

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

Common local deployment tools and their default endpoints:

| 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

Switching models under a custom vendor only changes `model` — `bot_type` and the API endpoint remain unchanged:

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