diff --git a/.generator/schemas/v1/openapi.yaml b/.generator/schemas/v1/openapi.yaml
index 48f45d0bc2b..10bb80eaa96 100644
--- a/.generator/schemas/v1/openapi.yaml
+++ b/.generator/schemas/v1/openapi.yaml
@@ -20015,7 +20015,8 @@ components:
           description: The account public ID.
           type: string
         billing_plan:
-          description: The billing plan.
+          deprecated: true
+          description: The billing plan (metadata). (Deprecated from May 2026)
           type: string
         end_date:
           description: Shows the last date of usage.
diff --git a/lib/datadog_api_client/v1/models/usage_billable_summary_hour.rb b/lib/datadog_api_client/v1/models/usage_billable_summary_hour.rb
index 99a9730144a..42e0883e462 100644
--- a/lib/datadog_api_client/v1/models/usage_billable_summary_hour.rb
+++ b/lib/datadog_api_client/v1/models/usage_billable_summary_hour.rb
@@ -27,7 +27,7 @@ class UsageBillableSummaryHour
     # The account public ID.
     attr_accessor :account_public_id
 
-    # The billing plan.
+    # The billing plan (metadata). (Deprecated from May 2026)
     attr_accessor :billing_plan
 
     # Shows the last date of usage.