diff --git a/qwen3_6_scripts/qwen3_5.py b/qwen3_6_scripts/qwen3_5.py
index eeda4793..9ce48a76 100644
--- a/qwen3_6_scripts/qwen3_5.py
+++ b/qwen3_6_scripts/qwen3_5.py
@@ -186,7 +186,7 @@ _USE_COREX_MOE_DIRECT_ROUTED = (
     and env_bool("BI100_MOE_COREX_DIRECT_ROUTED", False))
 _USE_COREX_MOE_TOPK_SOFTMAX = (
     _corex_moe_topk_softmax is not None
-    and env_bool("BI100_MOE_COREX_TOPK_SOFTMAX", True))
+    and env_bool("BI100_MOE_COREX_TOPK_SOFTMAX", False))
 _USE_FUSED_MOE_ACTIVATION = env_bool("BI100_MOE_FUSED_ACTIVATION", True)