diff --git a/.generator/schemas/v2/openapi.yaml b/.generator/schemas/v2/openapi.yaml
index 035a0b32780..24530d7eac4 100644
--- a/.generator/schemas/v2/openapi.yaml
+++ b/.generator/schemas/v2/openapi.yaml
@@ -13765,6 +13765,13 @@ components:
         data:
           $ref: "#/components/schemas/ConvertJobResultsToSignalsData"
       type: object
+    CostAggregationType:
+      description: "Controls how costs are aggregated when using `start_date`. The `cumulative` option returns month-to-date running totals."
+      enum:
+        - cumulative
+      type: string
+      x-enum-varnames:
+        - CUMULATIVE
     CostAttributionAggregates:
       description: An array of available aggregates.
       items:
@@ -106713,6 +106720,12 @@ paths:
           schema:
             format: date-time
             type: string
+        - description: "Controls how costs are aggregated when using `start_date`. The `cumulative` option returns month-to-date running totals."
+          in: query
+          name: cost_aggregation
+          required: false
+          schema:
+            $ref: "#/components/schemas/CostAggregationType"
         - description: "Boolean to specify whether to include accounts connected to the current account as partner customers in the Datadog partner network program. Defaults to `false`."
           in: query
           name: include_connected_accounts
diff --git a/src/main/java/com/datadog/api/client/v2/api/UsageMeteringApi.java b/src/main/java/com/datadog/api/client/v2/api/UsageMeteringApi.java
index 38128cc383e..9e0179eea88 100644
--- a/src/main/java/com/datadog/api/client/v2/api/UsageMeteringApi.java
+++ b/src/main/java/com/datadog/api/client/v2/api/UsageMeteringApi.java
@@ -6,6 +6,7 @@
 import com.datadog.api.client.Pair;
 import com.datadog.api.client.v2.model.ActiveBillingDimensionsResponse;
 import com.datadog.api.client.v2.model.BillingDimensionsMappingResponse;
+import com.datadog.api.client.v2.model.CostAggregationType;
 import com.datadog.api.client.v2.model.CostByOrgResponse;
 import com.datadog.api.client.v2.model.HourlyUsageResponse;
 import com.datadog.api.client.v2.model.MonthlyCostAttributionResponse;
@@ -595,6 +596,7 @@ public static class GetEstimatedCostByOrgOptionalParameters {
     private OffsetDateTime endMonth;
     private OffsetDateTime startDate;
     private OffsetDateTime endDate;
+    private CostAggregationType costAggregation;
     private Boolean includeConnectedAccounts;
 
     /**
@@ -662,6 +664,19 @@ public GetEstimatedCostByOrgOptionalParameters endDate(OffsetDateTime endDate) {
       return this;
     }
 
+    /**
+     * Set costAggregation.
+     *
+     * @param costAggregation Controls how costs are aggregated when using <code>start_date</code>.
+     *     The <code>cumulative</code> option returns month-to-date running totals. (optional)
+     * @return GetEstimatedCostByOrgOptionalParameters
+     */
+    public GetEstimatedCostByOrgOptionalParameters costAggregation(
+        CostAggregationType costAggregation) {
+      this.costAggregation = costAggregation;
+      return this;
+    }
+
     /**
      * Set includeConnectedAccounts.
      *
@@ -767,6 +782,7 @@ public ApiResponse<CostByOrgResponse> getEstimatedCostByOrgWithHttpInfo(
     OffsetDateTime endMonth = parameters.endMonth;
     OffsetDateTime startDate = parameters.startDate;
     OffsetDateTime endDate = parameters.endDate;
+    CostAggregationType costAggregation = parameters.costAggregation;
     Boolean includeConnectedAccounts = parameters.includeConnectedAccounts;
     // create path and map variables
     String localVarPath = "/api/v2/usage/estimated_cost";
@@ -779,6 +795,7 @@ public ApiResponse<CostByOrgResponse> getEstimatedCostByOrgWithHttpInfo(
     localVarQueryParams.addAll(apiClient.parameterToPairs("", "end_month", endMonth));
     localVarQueryParams.addAll(apiClient.parameterToPairs("", "start_date", startDate));
     localVarQueryParams.addAll(apiClient.parameterToPairs("", "end_date", endDate));
+    localVarQueryParams.addAll(apiClient.parameterToPairs("", "cost_aggregation", costAggregation));
     localVarQueryParams.addAll(
         apiClient.parameterToPairs("", "include_connected_accounts", includeConnectedAccounts));
 
@@ -818,6 +835,7 @@ public CompletableFuture<ApiResponse<CostByOrgResponse>> getEstimatedCostByOrgWi
     OffsetDateTime endMonth = parameters.endMonth;
     OffsetDateTime startDate = parameters.startDate;
     OffsetDateTime endDate = parameters.endDate;
+    CostAggregationType costAggregation = parameters.costAggregation;
     Boolean includeConnectedAccounts = parameters.includeConnectedAccounts;
     // create path and map variables
     String localVarPath = "/api/v2/usage/estimated_cost";
@@ -830,6 +848,7 @@ public CompletableFuture<ApiResponse<CostByOrgResponse>> getEstimatedCostByOrgWi
     localVarQueryParams.addAll(apiClient.parameterToPairs("", "end_month", endMonth));
     localVarQueryParams.addAll(apiClient.parameterToPairs("", "start_date", startDate));
     localVarQueryParams.addAll(apiClient.parameterToPairs("", "end_date", endDate));
+    localVarQueryParams.addAll(apiClient.parameterToPairs("", "cost_aggregation", costAggregation));
     localVarQueryParams.addAll(
         apiClient.parameterToPairs("", "include_connected_accounts", includeConnectedAccounts));
 
diff --git a/src/main/java/com/datadog/api/client/v2/model/CostAggregationType.java b/src/main/java/com/datadog/api/client/v2/model/CostAggregationType.java
new file mode 100644
index 00000000000..e0b732a52bf
--- /dev/null
+++ b/src/main/java/com/datadog/api/client/v2/model/CostAggregationType.java
@@ -0,0 +1,57 @@
+/*
+ * Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ * This product includes software developed at Datadog (https://www.datadoghq.com/).
+ * Copyright 2019-Present Datadog, Inc.
+ */
+
+package com.datadog.api.client.v2.model;
+
+import com.datadog.api.client.ModelEnum;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Controls how costs are aggregated when using <code>start_date</code>. The <code>cumulative</code>
+ * option returns month-to-date running totals.
+ */
+@JsonSerialize(using = CostAggregationType.CostAggregationTypeSerializer.class)
+public class CostAggregationType extends ModelEnum<String> {
+
+  private static final Set<String> allowedValues = new HashSet<String>(Arrays.asList("cumulative"));
+
+  public static final CostAggregationType CUMULATIVE = new CostAggregationType("cumulative");
+
+  CostAggregationType(String value) {
+    super(value, allowedValues);
+  }
+
+  public static class CostAggregationTypeSerializer extends StdSerializer<CostAggregationType> {
+    public CostAggregationTypeSerializer(Class<CostAggregationType> t) {
+      super(t);
+    }
+
+    public CostAggregationTypeSerializer() {
+      this(null);
+    }
+
+    @Override
+    public void serialize(
+        CostAggregationType value, JsonGenerator jgen, SerializerProvider provider)
+        throws IOException, JsonProcessingException {
+      jgen.writeObject(value.value);
+    }
+  }
+
+  @JsonCreator
+  public static CostAggregationType fromValue(String value) {
+    return new CostAggregationType(value);
+  }
+}