diff --git a/src/infiniop/ops/topkrouter/cuda/kernel.cuh b/src/infiniop/ops/topkrouter/cuda/kernel.cuh
index 0832c5b93..0e1578b50 100644
--- a/src/infiniop/ops/topkrouter/cuda/kernel.cuh
+++ b/src/infiniop/ops/topkrouter/cuda/kernel.cuh
@@ -6,16 +6,16 @@
 #include <cub/block/block_reduce.cuh>
 #include <cub/block/block_store.cuh>
 #include <cub/cub.cuh>
-#include <cuda_bf16.h>
-#include <cuda_fp16.h>
-#include <cuda_runtime.h>
+// #include <cuda_bf16.h>
+// #include <cuda_fp16.h>
+// #include <cuda_runtime.h>
 
 template <typename T>
 inline __device__ float exp_func(T x) {
     float data;
     if constexpr (std::is_same_v<T, float>) {
         data = x;
-    } else if constexpr (std::is_same_v<T, __nv_bfloat16>) {
+    } else if constexpr (std::is_same_v<T, cuda_bfloat16>) {
         data = __bfloat162float(x);
     } else if constexpr (std::is_same_v<T, half>) {
         data = __half2float(x);
diff --git a/src/infiniop/ops/topkrouter/metax/topkrouter_metax.h b/src/infiniop/ops/topkrouter/metax/topkrouter_metax.h
new file mode 100644
index 000000000..62f17dc6c
--- /dev/null
+++ b/src/infiniop/ops/topkrouter/metax/topkrouter_metax.h
@@ -0,0 +1,8 @@
+#ifndef __TOPKROUTER_METAX_H__
+#define __TOPKROUTER_METAX_H__
+
+#include "../topkrouter.h"
+
+DESCRIPTOR(metax)
+
+#endif
diff --git a/src/infiniop/ops/topkrouter/metax/topkrouter_metax.maca b/src/infiniop/ops/topkrouter/metax/topkrouter_metax.maca
new file mode 100644
index 000000000..71c2d37d6
--- /dev/null
+++ b/src/infiniop/ops/topkrouter/metax/topkrouter_metax.maca
@@ -0,0 +1,93 @@
+#include "../../../devices/metax/metax_common.h"
+#include "../../../devices/metax/metax_kernel_common.h"
+#include "../cuda/kernel.cuh"
+#include "topkrouter_metax.h"
+#include <cub/block/block_reduce.cuh>
+
+namespace op::topkrouter::metax {
+
+struct Descriptor::Opaque {
+    std::shared_ptr<device::metax::Handle::Internal> internal;
+};
+
+Descriptor::~Descriptor() {
+    delete _opaque;
+}
+
+infiniStatus_t Descriptor::create(
+    infiniopHandle_t handle,
+    Descriptor **desc_ptr,
+    infiniopTensorDescriptor_t x_desc,
+    infiniopTensorDescriptor_t correction_bias_desc) {
+    auto result = TopkrouterInfo::create(x_desc);
+    CHECK_RESULT(result);
+    auto info = result.take();
+
+    if (info.x_strides[1] != 1) {
+        return INFINI_STATUS_BAD_TENSOR_STRIDES;
+    }
+
+    *desc_ptr = new Descriptor(
+        new Opaque{reinterpret_cast<device::metax::Handle *>(handle)->internal()},
+        std::move(info),
+        0,
+        handle->device, handle->device_id);
+    return INFINI_STATUS_SUCCESS;
+}
+
+namespace {
+
+template <int BLOCK_SIZE = 128>
+infiniStatus_t launch_topkrouter(float *d_values_out, int *d_indices_out, const void *d_input, const float *d_correction_bias,
+                                 const float routed_scaling_factor, const size_t N, const size_t width, const size_t topk, infiniDtype_t xtype,
+                                 hcStream_t stream) {
+    const int block_threads = BLOCK_SIZE;
+    dim3 blocks(N);
+    dim3 threads(block_threads);
+
+    if (xtype == INFINI_DTYPE_F32) {
+        topkrouter_kernel<float, BLOCK_SIZE><<<blocks, threads, 0, stream>>>(d_values_out, d_indices_out, (float *)d_input, d_correction_bias, routed_scaling_factor, N, width, topk);
+    } else if (xtype == INFINI_DTYPE_F16) {
+        topkrouter_kernel<half, BLOCK_SIZE><<<blocks, threads, 0, stream>>>(d_values_out, d_indices_out, (half *)d_input, d_correction_bias, routed_scaling_factor, N, width, topk);
+    } else if (xtype == INFINI_DTYPE_BF16) {
+        topkrouter_kernel<cuda_bfloat16, BLOCK_SIZE><<<blocks, threads, 0, stream>>>(d_values_out, d_indices_out, (cuda_bfloat16 *)d_input, d_correction_bias, routed_scaling_factor, N, width, topk);
+    } else {
+        return INFINI_STATUS_BAD_TENSOR_DTYPE;
+    }
+
+    return INFINI_STATUS_SUCCESS;
+}
+
+}; // namespace
+
+infiniStatus_t Descriptor::calculate(
+    void *workspace,
+    size_t workspace_size,
+    float *values,
+    int *indices,
+    const void *x,
+    const float *correction_bias,
+    const float routed_scaling_factor,
+    const size_t topk,
+    void *stream) const {
+    if (workspace_size < _workspace_size) {
+        return INFINI_STATUS_INSUFFICIENT_WORKSPACE;
+    }
+
+    size_t N = _info.N;
+    size_t width = _info.width; // 256
+
+    // size_t n_routed_experts = 256;
+    // size_t n_group = 8;
+    // size_t topk_group = 4;
+    auto cuda_stream = reinterpret_cast<hcStream_t>(stream);
+
+    if (256 == width) {
+        launch_topkrouter<256>(values, indices, x, correction_bias, routed_scaling_factor, N, width, topk, _info.xtype, cuda_stream);
+    } else {
+        return INFINI_STATUS_BAD_PARAM;
+    }
+
+    return INFINI_STATUS_SUCCESS;
+}
+} // namespace op::topkrouter::metax
diff --git a/src/infiniop/ops/topkrouter/operator.cc b/src/infiniop/ops/topkrouter/operator.cc
index 89555e9f9..73b6e9bcf 100644
--- a/src/infiniop/ops/topkrouter/operator.cc
+++ b/src/infiniop/ops/topkrouter/operator.cc
@@ -8,6 +8,9 @@
 #if defined(ENABLE_NVIDIA_API) || defined(ENABLE_QY_API)
 #include "nvidia/topkrouter_nvidia.cuh"
 #endif
+#ifdef ENABLE_METAX_API
+#include "metax/topkrouter_metax.h"
+#endif
 #ifdef ENABLE_KUNLUN_API
 #include "kunlun/topkrouter_kunlun.h"
 #endif
@@ -30,6 +33,9 @@ __C infiniStatus_t infiniopCreateTopkrouterDescriptor(infiniopHandle_t handle, i
 #ifdef ENABLE_QY_API
         CREATE(INFINI_DEVICE_QY, nvidia);
 #endif
+#ifdef ENABLE_METAX_API
+        CREATE(INFINI_DEVICE_METAX, metax);
+#endif
 #ifdef ENABLE_KUNLUN_API
         CREATE(INFINI_DEVICE_KUNLUN, kunlun);
 #endif
@@ -56,6 +62,9 @@ __C infiniStatus_t infiniopGetTopkrouterWorkspaceSize(infiniopTopkrouterDescript
 #ifdef ENABLE_QY_API
         GET(INFINI_DEVICE_QY, nvidia);
 #endif
+#ifdef ENABLE_METAX_API
+        GET(INFINI_DEVICE_METAX, metax);
+#endif
 #ifdef ENABLE_KUNLUN_API
         GET(INFINI_DEVICE_KUNLUN, kunlun);
 #endif
@@ -85,6 +94,9 @@ __C infiniStatus_t infiniopTopkrouter(infiniopTopkrouterDescriptor_t desc, void
 #ifdef ENABLE_QY_API
         CALCULATE(INFINI_DEVICE_QY, nvidia);
 #endif
+#ifdef ENABLE_METAX_API
+        CALCULATE(INFINI_DEVICE_METAX, metax);
+#endif
 #ifdef ENABLE_KUNLUN_API
         CALCULATE(INFINI_DEVICE_KUNLUN, kunlun);
 #endif
@@ -111,6 +123,9 @@ __C infiniStatus_t infiniopDestroyTopkrouterDescriptor(infiniopTopkrouterDescrip
 #ifdef ENABLE_QY_API
         DESTROY(INFINI_DEVICE_QY, nvidia);
 #endif
+#ifdef ENABLE_METAX_API
+        DESTROY(INFINI_DEVICE_METAX, metax);
+#endif
 #ifdef ENABLE_KUNLUN_API
         DESTROY(INFINI_DEVICE_KUNLUN, kunlun);
 #endif