Custom - Chatgpt On Wechat

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	`http://localhost:11434/v1`
vLLM	`http://localhost:8000/v1`
LocalAI	`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