Update app.py

app.py

@@ -17,12 +17,11 @@ from langchain_openai import OpenAIEmbeddings, ChatOpenAI
 import faiss
 
 # Load environment variables
-load_dotenv()
 os.environ["OPENAI_API_KEY"] = os.getenv("OPENAI_API_KEY")
 
 # Global settings for LlamaIndex
 EMBED_DIMENSION = 512
-Settings.llm = OpenAI(model="gpt-3.5-turbo")
+Settings.llm = OpenAI(model="gpt-4o")
 Settings.embed_model = OpenAIEmbedding(model="text-embedding-3-small", dimensions=EMBED_DIMENSION)
 
 # Streamlit app