diff --git a/src/memos/api/product_models.py b/src/memos/api/product_models.py
index 7ba31669c..e0f483e0a 100644
--- a/src/memos/api/product_models.py
+++ b/src/memos/api/product_models.py
@@ -328,7 +328,7 @@ class APISearchRequest(BaseRequest):
     )
 
     relativity: float = Field(
-        0.57,
+        0.0,
         ge=0,
         description=(
             "Relevance threshold for recalled memories. "