From a27b3c3e1e9e40767720a00c19d7c0f08329d537 Mon Sep 17 00:00:00 2001
From: Devanshu Rajesh Chicholikar <chicholikar.d@northeastern.edu>
Date: Sun, 4 Jan 2026 18:07:33 -0500
Subject: [PATCH] chore: upgrade rerank model to v4.0-fast

- Updated default model from rerank-v3.5 to rerank-v4.0-fast
- v4.0 is Cohere's latest reranking model (Dec 2024)
- Supports 100+ languages with better accuracy
- Alternative: rerank-v4.0-pro for max accuracy
---
 backend/services/search_v2/hybrid_searcher.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/services/search_v2/hybrid_searcher.py b/backend/services/search_v2/hybrid_searcher.py
index 01abf9d..db80363 100644
--- a/backend/services/search_v2/hybrid_searcher.py
+++ b/backend/services/search_v2/hybrid_searcher.py
@@ -28,7 +28,7 @@ def __init__(
         pinecone_index,
         embedding_fn,
         cohere_api_key: Optional[str] = None,
-        rerank_model: str = "rerank-v3.5",
+        rerank_model: str = "rerank-v4.0-fast",
     ):
         self.index = pinecone_index
         self.embed = embedding_fn