diff --git a/pandas/core/reshape/reshape.py b/pandas/core/reshape/reshape.py
index accb577d5345c..1842e50c9ba7f 100644
--- a/pandas/core/reshape/reshape.py
+++ b/pandas/core/reshape/reshape.py
@@ -234,7 +234,17 @@ def _make_selectors(self) -> None:
         self.group_index = comp_index
         self.mask = mask
         if self.sort:
-            self.compressor = comp_index.searchsorted(np.arange(ngroups))
+            import sys
+
+            # GH 63314: avoid searchsorted bug with py3.14 + numpy < 2.0
+            numpy_major = int(np.__version__.split(".")[0])
+            has_searchsorted_bug = sys.version_info >= (3, 14) and numpy_major < 2
+
+            if has_searchsorted_bug:
+                # use manual approach instead of buggy searchsorted
+                self.compressor = np.sort(np.unique(comp_index, return_index=True)[1])
+            else:
+                self.compressor = comp_index.searchsorted(np.arange(ngroups))
         else:
             self.compressor = np.sort(np.unique(comp_index, return_index=True)[1])