Custom - Chatgpt On Wechat

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