Update app.py

app.py

@@ -1,11 +1,6 @@
 import os
 import logging
 from dotenv import load_dotenv
-import subprocess
-
-# Force reinstall Gradio
-subprocess.run(["pip", "install", "--upgrade", "gradio==4.44.1"])
-
 import gradio as gr
 import threading
 import time
@@ -292,7 +287,7 @@ def get_history_by_session_id(session_id):
 def get_llm(model: str):
     """Retrieve the specified language model based on the model name."""
     model = model.lower().strip()
-    env_key = f"LLM_MODEL_CONFIG_{model}"
+    env_key = f"LLM_MODEL_CONFIG_{model.replace('-', '_')}"
     env_value = os.environ.get(env_key)
 
     if not env_value: