Update backend/app.py

backend/app.py

@@ -23,7 +23,16 @@ import chainlit as cl
 
 @cl.on_chat_start
 async def on_chat_start():
-    lm_config = lm.OpenAIGPTConfig(chat_model="default")
+    lm_config = lm.OpenAIGPTConfig(
+    chat_model=models['phi3'],
+    chat_context_length=4000,  # set this based on model
+    max_output_tokens=4096,
+    temperature=0.2,
+    stream=True,
+    timeout=45,
+)
+
+
     agent = lr.ChatAgent(lr.ChatAgentConfig(llm=lm_config))
     task = lr.Task(agent, interactive=True)