Update reranker.py

reranker.py

@@ -12,8 +12,9 @@ pip install sentence-transformers
 from sentence_transformers import CrossEncoder
 
 # Best model for semantic relevance matching
-# Best model for semantic relevance matching (Upgraded to L-12 for maximum accuracy)
-RERANK_MODEL = "cross-encoder/ms-marco-MiniLM-L-12-v2"
+# UPGRADE: Using BAAI/bge-reranker-base for State-of-the-Art Accuracy
+# This model outperforms MS-MARCO MiniLM significantly
+RERANK_MODEL = "BAAI/bge-reranker-base"
 
 class Reranker: