diff --git a/sample/sagemaker/2017-07-24/service-2.json b/sample/sagemaker/2017-07-24/service-2.json
index 95be304..26c2fb3 100644
--- a/sample/sagemaker/2017-07-24/service-2.json
+++ b/sample/sagemaker/2017-07-24/service-2.json
@@ -9447,7 +9447,8 @@
         "ml.r7i.12xlarge",
         "ml.r7i.16xlarge",
         "ml.r7i.24xlarge",
-        "ml.r7i.48xlarge"
+        "ml.r7i.48xlarge",
+        "ml.p6-b300.48xlarge"
       ]
     },
     "ClusterKubernetesConfig":{
@@ -9815,7 +9816,6 @@
     },
     "ClusterOrchestrator":{
       "type":"structure",
-      "required":["Eks"],
       "members":{
         "Eks":{
           "shape":"ClusterOrchestratorEksConfig",
@@ -27014,7 +27014,7 @@
       "type":"integer",
       "documentation":"<p>Optional. Customer requested period in seconds for which the Training cluster is kept alive after the job is finished.</p>",
       "box":true,
-      "max":3600,
+      "max":21600,
       "min":0
     },
     "KendraSettings":{
@@ -39781,7 +39781,8 @@
         "ml.p6-b200.48xlarge",
         "ml.p4de.24xlarge",
         "ml.p6e-gb200.36xlarge",
-        "ml.p5.4xlarge"
+        "ml.p5.4xlarge",
+        "ml.p6-b300.48xlarge"
       ]
     },
     "ReservedCapacityOffering":{
@@ -43475,7 +43476,8 @@
         "ml.r7i.24xlarge",
         "ml.r7i.48xlarge",
         "ml.p6e-gb200.36xlarge",
-        "ml.p5.4xlarge"
+        "ml.p5.4xlarge",
+        "ml.p6-b300.48xlarge"
       ]
     },
     "TrainingInstanceTypes":{
diff --git a/src/sagemaker_core/main/shapes.py b/src/sagemaker_core/main/shapes.py
index fc3f9f4..482f601 100644
--- a/src/sagemaker_core/main/shapes.py
+++ b/src/sagemaker_core/main/shapes.py
@@ -4254,7 +4254,7 @@ class ClusterOrchestrator(Base):
     eks: The Amazon EKS cluster used as the orchestrator for the SageMaker HyperPod cluster.
     """
 
-    eks: ClusterOrchestratorEksConfig
+    eks: Optional[ClusterOrchestratorEksConfig] = Unassigned()
 
 
 class FSxLustreConfig(Base):