Update app.py

app.py

@@ -29,7 +29,7 @@ from llama_index.core.schema import ImageNode
 from langchain_core.prompts import ChatPromptTemplate
 from langchain_core.prompts import HumanMessagePromptTemplate
 from langchain_core.messages import SystemMessage
-
+from llama_index.embeddings.huggingface import HuggingFaceEmbedding
 nest_asyncio.apply()
 
 # Setting API keys
@@ -123,8 +123,8 @@ else:
     text_nodes = []
 
 # Setup index and LLM
-embed_model = OpenAIEmbedding(model="text-embedding-3-large")
-llm = OpenAI("gpt-4o-mini-2024-07-18")
+embed_model = HuggingFaceEmbedding(model="neuml/pubmedbert-base-embeddings")
+llm = OpenAI(model="gpt-4o-mini-2024-07-18", temperature=0.1)
 Settings.llm = llm
 Settings.embed_model = embed_model