diff --git a/packages/aws-cdk-lib/aws-ec2/lib/instance-types.ts b/packages/aws-cdk-lib/aws-ec2/lib/instance-types.ts
index 3c4612239ab02..a6077bfe7c7e3 100644
--- a/packages/aws-cdk-lib/aws-ec2/lib/instance-types.ts
+++ b/packages/aws-cdk-lib/aws-ec2/lib/instance-types.ts
@@ -674,6 +674,18 @@ export enum InstanceClass {
    */
   C7GN = 'c7gn',
 
+  /**
+   * Compute optimized instances for high performance computing, 8th generation with Graviton4 processors
+   * and high network bandwidth capabilities
+   */
+  COMPUTE8_GRAVITON4_HIGH_NETWORK_BANDWIDTH = 'compute8-graviton4-high-network-bandwidth',
+
+  /**
+   * Compute optimized instances for high performance computing, 8th generation with Graviton4 processors
+   * and high network bandwidth capabilities
+   */
+  C8GN = 'c8gn',
+
   /**
    * Compute optimized instances based on Intel Xeon Scalable (Sapphire Rapids) processors, 7th generation
    */
@@ -1827,6 +1839,8 @@ export class InstanceType {
       [InstanceClass.C8G]: 'c8g',
       [InstanceClass.COMPUTE8_GRAVITON4_NVME_DRIVE]: 'c8gd',
       [InstanceClass.C8GD]: 'c8gd',
+      [InstanceClass.COMPUTE8_GRAVITON4_HIGH_NETWORK_BANDWIDTH]: 'c8gn',
+      [InstanceClass.C8GN]: 'c8gn',
       [InstanceClass.STORAGE2]: 'd2',
       [InstanceClass.D2]: 'd2',
       [InstanceClass.STORAGE3]: 'd3',