diff --git a/cub/cub/device/dispatch/tuning/tuning_reduce_by_key.cuh b/cub/cub/device/dispatch/tuning/tuning_reduce_by_key.cuh
index a5ad19df8cc..db56906e314 100644
--- a/cub/cub/device/dispatch/tuning/tuning_reduce_by_key.cuh
+++ b/cub/cub/device/dispatch/tuning/tuning_reduce_by_key.cuh
@@ -607,6 +607,252 @@ struct sm90_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::no, primitive
   using delay_constructor                            = detail::no_delay_constructor_t<1150>;
 };
 
+template <class KeyT,
+          class AccumT,
+          primitive_op PrimitiveOp,
+          primitive_key PrimitiveKey     = is_primitive_key<KeyT>(),
+          primitive_accum PrimitiveAccum = is_primitive_accum<AccumT>(),
+          key_size KeySize               = classify_key_size<KeyT>(),
+          accum_size AccumSize           = classify_accum_size<AccumT>()>
+struct sm100_tuning;
+
+// 8-bit key
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_1, accum_size::_1>
+{
+  // ipt_13.tpb_576.trp_0.ld_1.ns_2044.dcid_5.l2w_240 1.161888  0.848558  1.134941  1.299109
+  static constexpr int items                         = 13;
+  static constexpr int threads                       = 576;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_DIRECT;
+  using delay_constructor                            = exponential_backon_jitter_window_constructor_t<2044, 240>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_CA;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_1, accum_size::_2>
+{
+  // ipt_10.tpb_224.trp_0.ld_0.ns_244.dcid_4.l2w_390 1.313932  1.260540  1.319588  1.427374
+  static constexpr int items                         = 10;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_DIRECT;
+  using delay_constructor                            = exponential_backoff_jitter_window_constructor_t<224, 390>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_1, accum_size::_4>
+{
+  // ipt_14.tpb_128.trp_0.ld_0.ns_248.dcid_2.l2w_285  1.118109  1.051534  1.134336  1.326788
+  static constexpr int items                         = 14;
+  static constexpr int threads                       = 128;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_DIRECT;
+  using delay_constructor                            = exponential_backoff_constructor_t<248, 285>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_1, accum_size::_8>
+{
+  // ipt_19.tpb_128.trp_1.ld_0.ns_132.dcid_1.l2w_540 1.113820  1.002404  1.105014  1.202296
+  static constexpr int items                         = 19;
+  static constexpr int threads                       = 128;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = fixed_delay_constructor_t<132, 540>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+// todo(gonidelis): Add tunings for I128.
+// template <class KeyT, class AccumT>
+// struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::no, key_size::_1,
+// accum_size::_16>
+// {
+// static constexpr int threads                       = 128;
+// static constexpr int items                         = 11;
+// static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+// using delay_constructor                            = detail::no_delay_constructor_t<1100>;
+// };
+
+// 16-bit key
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_2, accum_size::_1>
+{
+  // ipt_14.tpb_128.trp_1.ld_0.ns_164.dcid_2.l2w_290 1.239579  1.119705  1.239111  1.313112
+  static constexpr int items                         = 14;
+  static constexpr int threads                       = 128;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = detail::exponential_backoff_constructor_t<164, 290>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_2, accum_size::_2>
+{
+  // ipt_14.tpb_256.trp_1.ld_0.ns_180.dcid_2.l2w_975 1.145635  1.012658  1.139956  1.251546
+  static constexpr int items                         = 14;
+  static constexpr int threads                       = 256;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backoff_constructor_t<180, 975>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_2, accum_size::_4>
+{
+  // ipt_11.tpb_256.trp_0.ld_0.ns_224.dcid_2.l2w_550 1.066293  1.000109  1.073092  1.181818
+  static constexpr int items                         = 11;
+  static constexpr int threads                       = 256;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_DIRECT;
+  using delay_constructor                            = exponential_backoff_constructor_t<224, 550>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_2, accum_size::_8>
+{
+  // ipt_10.tpb_160.trp_1.ld_0.ns_156.dcid_1.l2w_725 1.045007  1.002105  1.049690  1.141827
+  static constexpr int items                         = 10;
+  static constexpr int threads                       = 160;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = fixed_delay_constructor_t<156, 725>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+// todo(gonidelis): Add tunings for I128.
+// template <class KeyT, class AccumT>
+// struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::no, key_size::_2,
+// accum_size::_16>
+// {
+// static constexpr int threads                       = 128;
+// static constexpr int items                         = 11;
+// static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+// using delay_constructor                            = detail::no_delay_constructor_t<1100>;
+// };
+
+// 32-bit key
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_4, accum_size::_1>
+{
+  // ipt_10.tpb_224.trp_0.ld_0.ns_324.dcid_2.l2w_285 1.157217  1.073724  1.166510  1.356940
+  static constexpr int items                         = 10;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_DIRECT;
+  using delay_constructor                            = exponential_backoff_constructor_t<324, 285>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_4, accum_size::_2>
+{
+  // ipt_11.tpb_256.trp_0.ld_0.ns_1984.dcid_5.l2w_115 1.214155  1.128842  1.214093  1.364476
+  static constexpr int items                         = 11;
+  static constexpr int threads                       = 256;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_DIRECT;
+  using delay_constructor                            = exponential_backon_jitter_window_constructor_t<1984, 115>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_4, accum_size::_4>
+{
+  // ipt_14.tpb_224.trp_1.ld_0.ns_476.dcid_5.l2w_1005 1.187378  1.119705  1.185397  1.258420
+
+  static constexpr int items                         = 14;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backon_jitter_window_constructor_t<476, 1005>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_4, accum_size::_8>
+{
+  // ipt_10.tpb_256.trp_1.ld_0.ns_1868.dcid_7.l2w_145 1.142915  1.020581  1.137459  1.237913
+  static constexpr int items                         = 10;
+  static constexpr int threads                       = 256;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backon_constructor_t<1868, 145>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+// todo(gonidelis): Add tunings for I128.
+// template <class KeyT, class AccumT>
+// struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::no, key_size::_4,
+// accum_size::_16>
+// {
+// static constexpr int threads                       = 128;
+// static constexpr int items                         = 11;
+// static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+// using delay_constructor                            = detail::no_delay_constructor_t<1100>;
+// };
+
+// 64-bit key
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_8, accum_size::_1>
+{
+  // ipt_9.tpb_224.trp_1.ld_0.ns_1940.dcid_5.l2w_460 1.157294  1.075650  1.153566  1.250729
+  static constexpr int items                         = 9;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backon_jitter_window_constructor_t<1940, 460>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_8, accum_size::_2>
+{
+  // ipt_11.tpb_224.trp_1.ld_1.ns_392.dcid_2.l2w_550 1.104034  1.007212  1.099543  1.220401
+  static constexpr int items                         = 11;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backoff_constructor_t<392, 550>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_CA;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_8, accum_size::_4>
+{
+  // ipt_9.tpb_224.trp_1.ld_0.ns_244.dcid_2.l2w_475 1.130098  1.000000  1.130661  1.215722
+  static constexpr int items                         = 9;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backoff_constructor_t<244, 475>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+template <class KeyT, class AccumT>
+struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::yes, key_size::_8, accum_size::_8>
+{
+  // ipt_9.tpb_224.trp_1.ld_0.ns_196.dcid_2.l2w_340 1.272056  1.142857  1.262499  1.352941
+  static constexpr int items                         = 9;
+  static constexpr int threads                       = 224;
+  static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+  using delay_constructor                            = exponential_backoff_constructor_t<196, 340>;
+  static constexpr CacheLoadModifier load_modifier   = LOAD_DEFAULT;
+};
+
+// todo(gonidelis): Add tunings for I128.
+// template <class KeyT, class AccumT>
+// struct sm100_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::no, key_size::_8,
+// accum_size::_16>
+// {
+//   static constexpr int threads                       = 128;
+//   static constexpr int items                         = 11;
+//   static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+//   using delay_constructor                            = detail::no_delay_constructor_t<1125>;
+// };
+
+// todo(gonidelis): Add tunings for 128-bit key.
+// 128-bit key
+// template <class KeyT, class AccumT>
+// struct sm90_tuning<KeyT, AccumT, primitive_op::yes, primitive_key::yes, primitive_accum::no, key_size::_16,
+// accum_size::_1>
+// {
+//   static constexpr int threads                       = 128;
+//   static constexpr int items                         = 11;
+//   static constexpr BlockLoadAlgorithm load_algorithm = BLOCK_LOAD_WARP_TRANSPOSE;
+//   using delay_constructor                            = detail::no_delay_constructor_t<1125>;
+// };
+
 template <class ReductionOpT, class AccumT, class KeyT>
 struct policy_hub
 {
@@ -668,7 +914,25 @@ struct policy_hub
       decltype(select_agent_policy<sm90_tuning<KeyT, AccumT, is_primitive_op<ReductionOpT>()>>(0));
   };
 
-  using MaxPolicy = Policy900;
+  struct Policy1000 : ChainedPolicy<1000, Policy1000, Policy900>
+  {
+    // Use values from tuning if a specialization exists, otherwise pick the default
+    template <typename Tuning>
+    static auto select_agent_policy(int)
+      -> AgentReduceByKeyPolicy<Tuning::threads,
+                                Tuning::items,
+                                Tuning::load_algorithm,
+                                Tuning::load_modifier,
+                                BLOCK_SCAN_WARP_SCANS,
+                                typename Tuning::delay_constructor>;
+
+    template <typename Tuning>
+    static auto select_agent_policy(long) -> typename Policy900::ReduceByKeyPolicyT;
+
+    using ReduceByKeyPolicyT =
+      decltype(select_agent_policy<sm100_tuning<KeyT, AccumT, is_primitive_op<ReductionOpT>()>>(0));
+  };
+  using MaxPolicy = Policy1000;
 };
 } // namespace reduce_by_key
 } // namespace detail