diff --git a/.github/scripts/pull-request-dashboard/dashboard.py b/.github/scripts/pull-request-dashboard/dashboard.py
index 93b3a0fe349..48652d7361e 100644
--- a/.github/scripts/pull-request-dashboard/dashboard.py
+++ b/.github/scripts/pull-request-dashboard/dashboard.py
@@ -323,7 +323,7 @@
 from utils import utc_now
 
 # --- CLI defaults ----------------------------------------------------------
-DEFAULT_MODEL = "gpt-5.4-mini"
+DEFAULT_MODEL = "gpt-5.6-luna"
 DEFAULT_BACKFILL_MAX_PRS = 50
 BACKFILL_RECORDED_FAILURE_STATUS = 2