diff --git a/.xgopilot.yml b/.xgopilot.yml
new file mode 100644
index 00000000..b625e31f
--- /dev/null
+++ b/.xgopilot.yml
@@ -0,0 +1,2 @@
+codex:
+  model: "gpt-5.3-codex"
\ No newline at end of file