From 4605ee001f28203be2f6d68e4e4bd3db35891727 Mon Sep 17 00:00:00 2001
From: Raphael Malikian <rtmalikian@gmail.com>
Date: Sat, 10 Oct 2026 05:06:37 -0700
Subject: [PATCH] Fix LogOdds.calibrate to compute the mean once instead of per
 score (#1365)

---
 src/python/txtai/embeddings/search/hybrid.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/python/txtai/embeddings/search/hybrid.py b/src/python/txtai/embeddings/search/hybrid.py
index db36aeff..ee5c9c5c 100644
--- a/src/python/txtai/embeddings/search/hybrid.py
+++ b/src/python/txtai/embeddings/search/hybrid.py
@@ -194,7 +194,8 @@ class LogOdds:
         array = [s for s in raw if s > 0]
         if array:
             median = sorted(array)[len(array) // 2]
-            std = (sum((x - sum(array) / len(array)) ** 2 for x in array) / len(array)) ** 0.5
+            mean = sum(array) / len(array)
+            std = (sum((x - mean) ** 2 for x in array) / len(array)) ** 0.5
             alpha = 1.0 / std if std > 0 else 1.0
 
         return median, alpha