diff --git a/vllm/model_executor/layers/fused_moe/experts/gpt_oss_triton_kernels_moe.py b/vllm/model_executor/layers/fused_moe/experts/gpt_oss_triton_kernels_moe.py
index ac317ac7762c..4584dfcc511b 100644
--- a/vllm/model_executor/layers/fused_moe/experts/gpt_oss_triton_kernels_moe.py
+++ b/vllm/model_executor/layers/fused_moe/experts/gpt_oss_triton_kernels_moe.py
@@ -651,11 +651,14 @@ def _supports_current_device() -> bool:
         cap = p.get_device_capability()
         if cap is None:
             return False
-        # (9,0) <= cap < (11,0) covers CUDA SM90 (Hopper), SM100+ (Blackwell)
-        # and ROCm gfx942/gfx950 (which map to 9.4/9.5).
+        # (9,0) <= cap < (13,0) covers CUDA SM90 (Hopper), SM100+ (datacenter
+        # Blackwell), SM120/SM121 (consumer Blackwell — RTX 50-series, GB10
+        # /DGX Spark) and ROCm gfx942/gfx950 (which map to 9.4/9.5). The lower
+        # bound is enforced because the Triton MXFP4 kernels rely on
+        # SM 9.0+ tensor-core / matmul instructions.
         if not has_triton_kernels():
             return False
-        return (9, 0) <= (cap.major, cap.minor) < (11, 0)
+        return (9, 0) <= (cap.major, cap.minor) < (13, 0)
 
     @staticmethod
     def _supports_no_act_and_mul() -> bool:
@@ -1065,11 +1068,14 @@ def _supports_current_device() -> bool:
         cap = p.get_device_capability()
         if cap is None:
             return False
-        # (9,0) <= cap < (11,0) covers CUDA SM90 (Hopper), SM100+ (Blackwell)
-        # and ROCm gfx942/gfx950 (which map to 9.4/9.5).
+        # (9,0) <= cap < (13,0) covers CUDA SM90 (Hopper), SM100+ (datacenter
+        # Blackwell), SM120/SM121 (consumer Blackwell — RTX 50-series, GB10
+        # /DGX Spark) and ROCm gfx942/gfx950 (which map to 9.4/9.5). The lower
+        # bound is enforced because the Triton MXFP4 kernels rely on
+        # SM 9.0+ tensor-core / matmul instructions.
         if not has_triton_kernels():
             return False
-        return (9, 0) <= (cap.major, cap.minor) < (11, 0)
+        return (9, 0) <= (cap.major, cap.minor) < (13, 0)
 
     @staticmethod
     def _supports_no_act_and_mul() -> bool: