diff --git a/codex-rs/file-search/src/lib.rs b/codex-rs/file-search/src/lib.rs
index 8754181670..0b0c3949ec 100644
--- a/codex-rs/file-search/src/lib.rs
+++ b/codex-rs/file-search/src/lib.rs
@@ -183,7 +183,13 @@ pub async fn run(
     }
 
     let mut matches: Vec<(u32, String)> = global_heap.into_iter().map(|r| r.0).collect();
-    matches.sort_by(|a, b| b.0.partial_cmp(&a.0).unwrap_or(std::cmp::Ordering::Equal));
+    // Sort by descending score, then ascending path for deterministic ordering.
+    matches.sort_by(|a, b| {
+        match b.0.cmp(&a.0) {
+            std::cmp::Ordering::Equal => a.1.cmp(&b.1),
+            other => other,
+        }
+    });
 
     Ok(FileSearchResults {
         matches,
@@ -281,4 +287,28 @@ mod tests {
         let score = pattern.score(haystack, &mut matcher);
         assert_eq!(score, None);
     }
+
+    #[test]
+    fn tie_breakers_sort_by_path_when_scores_equal() {
+        let mut matches = vec![
+            (100, "b_path".to_string()),
+            (100, "a_path".to_string()),
+            (90, "zzz".to_string()),
+        ];
+
+        // Sort using the same comparator as production code.
+        matches.sort_by(|a, b| match b.0.cmp(&a.0) {
+            std::cmp::Ordering::Equal => a.1.cmp(&b.1),
+            other => other,
+        });
+
+        // Highest score first; ties broken alphabetically.
+        let expected = vec![
+            (100, "a_path".to_string()),
+            (100, "b_path".to_string()),
+            (90, "zzz".to_string()),
+        ];
+
+        assert_eq!(matches, expected);
+    }
 }