diff --git a/src/cpu/x64/matmul/brgemm_matmul_copy_utils.cpp b/src/cpu/x64/matmul/brgemm_matmul_copy_utils.cpp
index 41826a9253e..2882dd52316 100644
--- a/src/cpu/x64/matmul/brgemm_matmul_copy_utils.cpp
+++ b/src/cpu/x64/matmul/brgemm_matmul_copy_utils.cpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
-* Copyright 2021-2024 Intel Corporation
+* Copyright 2021-2025 Intel Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -151,7 +151,10 @@ struct jit_brgemm_matmul_copy_a_impl_t : public jit_brgemm_matmul_copy_a_t,
 template <>
 void jit_brgemm_matmul_copy_a_impl_t<Zmm>::load_vmm(int idx, int offset) {
     const auto addr = EVEX_compress_addr(reg_src, offset);
-    if (conf_->isa == avx512_core_fp16) {
+    if (conf_->isa == avx512_core_fp16
+            && conf_->orig_wei_dt == data_type::f16) {
+        // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt`
+        // is used.
         vcvtph2psx(get_vmm_copy(idx), addr);
     } else
         vmovdqu8(get_vmm_copy(idx), addr);
@@ -186,8 +189,12 @@ void jit_brgemm_matmul_copy_a_impl_t<Zmm>::load_tail(
         }
     };
 
-    const size_t dt_step
-            = conf_->is_bf32 || conf_->isa == avx512_core_fp16 ? 1 : typesize_;
+    // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt` is used.
+    const size_t dt_step = conf_->is_bf32
+                    || (conf_->isa == avx512_core_fp16
+                            && conf_->orig_wei_dt == data_type::f16)
+            ? 1
+            : typesize_;
     const size_t tail_mask_load = size_t(((size_t)1 << (dt_step * k_tail)) - 1);
     kmovx(kTail_load, tail_mask_load);
     const int k_tail_st = rnd_up(k_tail, vnni_granularity_);
@@ -202,7 +209,10 @@ void jit_brgemm_matmul_copy_a_impl_t<Zmm>::load_tail(
     auto load_addr = EVEX_compress_addr(reg_src, offset * typesize_);
     if (conf_->is_bf32)
         vmovups(zmm_tail, load_addr);
-    else if (conf_->isa == avx512_core_fp16)
+    else if (conf_->isa == avx512_core_fp16
+            && conf_->orig_wei_dt == data_type::f16)
+        // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt`
+        // is used.
         vcvtph2psx(zmm_tail, load_addr);
     else
         vmovdqu8(zmm_tail, load_addr);
@@ -223,7 +233,10 @@ void jit_brgemm_matmul_copy_a_impl_t<Zmm>::store_tail(
         Ymm ymm_downcvt_bf16 = Ymm(get_vmm_copy(0).getIdx());
         vcvtneps2bf16(ymm_downcvt_bf16, get_vmm_copy(0));
         vmovdqu16(tr_src_addr, ymm_downcvt_bf16 | kTail_store);
-    } else if (conf_->isa == avx512_core_fp16) {
+    } else if (conf_->isa == avx512_core_fp16
+            && conf_->orig_wei_dt == data_type::f16) {
+        // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt`
+        // is used.
         vmovups(tr_src_addr, get_vmm_copy(0) | kTail_store);
     } else
         vmovdqu8(tr_src_addr, get_vmm_copy(0) | kTail_store);
@@ -943,13 +956,17 @@ void jit_brgemm_matmul_copy_a_transposed_impl_t<Xbyak::Zmm>::transpose_f32(
         const auto addr = is_dynamic_src_ld
                 ? ptr[i % 2 == 0 ? reg_aux_src0 : reg_aux_src1]
                 : EVEX_compress_addr(src, i * src_stride);
-        if (i < nrows)
-            if (conf_->isa == avx512_core_fp16)
+        if (i < nrows) {
+            if (conf_->isa == avx512_core_fp16
+                    && conf_->orig_wei_dt == data_type::f16)
+                // See the note in `create_brgemm_matmul_copy_b` why
+                // `orig_wei_dt` is used.
                 vcvtph2psx(src_zmm(i) | kTail | T_z, addr);
             else
                 vmovups(src_zmm(i) | kTail | T_z, addr);
-        else
+        } else {
             vpxord(src_zmm(i), src_zmm(i), src_zmm(i));
+        }
     };
 
     auto store = [this, dst](Zmm r, int i) {
@@ -1075,7 +1092,11 @@ void jit_brgemm_matmul_copy_a_transposed_impl_t<Xbyak::Zmm>::transpose_f32(
 template <typename Vmm>
 void jit_brgemm_matmul_copy_a_transposed_impl_t<Vmm>::deploy_transpose(
         reg64_t dst, reg64_t src, int nrows, int ncolumns) {
-    if (is_f32 || conf_->isa == avx512_core_fp16)
+    if (is_f32
+            || (conf_->isa == avx512_core_fp16
+                    && conf_->orig_wei_dt == data_type::f16))
+        // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt`
+        // is used.
         transpose_f32(dst, src, nrows, ncolumns);
     else
         transpose_bf16(dst, src, nrows, ncolumns);
@@ -3714,7 +3735,12 @@ void jit_brgemm_matmul_copy_b_transposed_t<Vmm>::init_tail_mask(
         const int columns_tail, const bool use_int4_mask) {
     assert(IMPLICATION(use_int4_mask, is_src_int4_));
     if (columns_tail > 0) {
-        const int dt_step = req_cvtps2bf16_ || conf_->isa == avx512_core_fp16
+
+        const int dt_step = req_cvtps2bf16_
+                        || (conf_->isa == avx512_core_fp16
+                                && conf_->orig_wei_dt == data_type::f16)
+                // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt`
+                // is used.
                 ? 1
                 : typesize_;
         const auto tail_mask = use_int4_mask
@@ -3870,11 +3896,14 @@ void jit_brgemm_matmul_copy_b_transposed_t<Vmm>::copy_row_x_col(
 
         auto src_load = columns_tail > 0 ? src_reg | kTail | T_z : src_reg;
         const auto addr = EVEX_compress_addr(reg_src, i * src_stride_);
-        if (conf_->isa == avx512_core_fp16)
+        if (conf_->isa == avx512_core_fp16
+                && conf_->orig_wei_dt == data_type::f16) {
+            // See the note in `create_brgemm_matmul_copy_b` why `orig_wei_dt`
+            // is used.
             vcvtph2psx(src_load, addr);
-        else
+        } else {
             vmovdqu8(src_load, addr);
-
+        }
         L(load_done);
     };
 
@@ -4687,7 +4716,10 @@ status_t create_brgemm_matmul_copy_b(
             else
                 CHECK(safe_ptr_assign(copy_ker,
                         new jit_brgemm_matmul_copy_b_bf16_t<Ymm>(conf)));
-        } else if (is_f32 || conf->isa == avx512_core_fp16) {
+        } else if (is_f32
+                || (conf->isa == avx512_core_fp16
+                        && conf->orig_wei_dt == data_type::f16)) {
+            // See the note above why `orig_wei_dt` is used.
             if (is_superset(conf->isa, avx512_core))
                 CHECK(safe_ptr_assign(copy_ker,
                         new jit_brgemm_matmul_copy_b_f32_t<Zmm>(conf)));