Update app.py

app.py

@@ -78,6 +78,14 @@ def main():
         options=list(range(2, 16)), 
         value=4  
     )
+
+    llm = ChatGroq(
+    model="gemma2-9b-it",  # Specify the Gemma2 9B model
+    temperature=0.0,
+    max_tokens=400,
+    max_retries=3
+    )
+    
     retriever = create_retriever_from_chroma(vectorstore_path="docs/chroma/", search_type=search_type, k=k, chunk_size=350, chunk_overlap=30)