Update app.py

app.py

@@ -1,4 +1,5 @@
 # Optimized RAG System with E5-Mistral Embeddings and Llama3-70B Generation
+
 import json
 import logging
 import re
@@ -23,8 +24,8 @@ from huggingface_hub import login
 FAISS_INDEX_PATH = "faiss_index"
 BM25_INDEX_PATH = "bm25_index.pkl"
 CACHE_VERSION = "v1"  # Increment when data format changes
-embedding_model_name = "intfloat/e5-mistral-7b-instruct"
-generation_model_name = "meta-llama/Meta-Llama-3-70B-Instruct"
+embedding_model_name = "sentence-transformers/all-MiniLM-L6-v2"
+generation_model_name = "mistralai/Mistral-7B-Instruct-v0.1"
 data_file_name = "AskNatureNet_data_enhanced.json"
 CHUNK_SIZE = 800
 OVERLAP = 200