Hi I think I you case you have set api url to what looks like a openai compatable endpoint.
My suggestion would be:
Set LLLM_NAME=openai
Then inside application/llm/openai.py

self.client = OpenAI(
 api_key=api_key,
 base_url="http://open.bigmodel.cn/api/paas/v4", 
 )

Alse in your env variables set MODEL_NAME to glm-4

API_URL should point to docsgpt backend.
Configuration of LLM endpoint is separate

Hope this helps