diff --git a/vllm/model_executor/layers/fused_moe/oracle/unquantized.py b/vllm/model_executor/layers/fused_moe/oracle/unquantized.py
index 4a9b190335..8e4012d3ec 100644
--- a/vllm/model_executor/layers/fused_moe/oracle/unquantized.py
+++ b/vllm/model_executor/layers/fused_moe/oracle/unquantized.py
@@ -68,6 +68,12 @@ def _get_priority_backends(moe_config: FusedMoEConfig) -> list[UnquantizedMoeBac
             UnquantizedMoeBackend.BATCHED_TRITON,
         ]
 
+        # On Hopper (SM90), the FlashInfer unquantized MoE kernels are slower
+        # than Triton, so prefer Triton by default.
+        if current_platform.is_device_capability_family(90):
+            _move_to_back(_AVAILABLE_BACKENDS, UnquantizedMoeBackend.FLASHINFER_TRTLLM)
+            _move_to_back(_AVAILABLE_BACKENDS, UnquantizedMoeBackend.FLASHINFER_CUTLASS)
+
         # HACK: Qwen3.5 has crash with FLASHINFER_CUTLASS BF16 if DEP.
         # Updating the oracle querying logic is out of the scope of this
         # PR. Need to fix the kernel or update structure in follow up.