diff --git a/.apigentools-info b/.apigentools-info
index 40ed234683..9f8fba1102 100644
--- a/.apigentools-info
+++ b/.apigentools-info
@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-08-26 18:14:51.589283",
-            "spec_repo_commit": "0857d88a"
+            "regenerated": "2024-08-27 12:12:27.969266",
+            "spec_repo_commit": "09daef2e"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2024-08-26 18:14:51.607938",
-            "spec_repo_commit": "0857d88a"
+            "regenerated": "2024-08-27 12:12:27.987178",
+            "spec_repo_commit": "09daef2e"
         }
     }
 }
\ No newline at end of file
diff --git a/.generator/schemas/v1/openapi.yaml b/.generator/schemas/v1/openapi.yaml
index d0a4c167da..8942f45728 100644
--- a/.generator/schemas/v1/openapi.yaml
+++ b/.generator/schemas/v1/openapi.yaml
@@ -5576,11 +5576,27 @@ components:
           description: The name of the index.
           example: main
           type: string
+        num_flex_logs_retention_days:
+          description: 'The total number of days logs are stored in Standard and Flex
+            Tier before being deleted from the index.
+
+            If Standard Tier is enabled on this index, logs are first retained in
+            Standard Tier for the number of days specified through `num_retention_days`,
+
+            and then stored in Flex Tier until the number of days specified in `num_flex_logs_retention_days`
+            is reached.
+
+            The available values depend on retention plans specified in your organization''s
+            contract/subscriptions.'
+          example: 360
+          format: int64
+          type: integer
         num_retention_days:
-          description: 'The number of days before logs are deleted from this index.
-            Available values depend on
+          description: 'The number of days logs are stored in Standard Tier before
+            aging into the Flex Tier or being deleted from the index.
 
-            retention plans specified in your organization''s contract/subscriptions.'
+            The available values depend on retention plans specified in your organization''s
+            contract/subscriptions.'
           example: 15
           format: int64
           type: integer
@@ -5639,17 +5655,35 @@ components:
           type: array
         filter:
           $ref: '#/components/schemas/LogsFilter'
-        num_retention_days:
-          description: 'The number of days before logs are deleted from this index.
-            Available values depend on
+        num_flex_logs_retention_days:
+          description: 'The total number of days logs are stored in Standard and Flex
+            Tier before being deleted from the index.
+
+            If Standard Tier is enabled on this index, logs are first retained in
+            Standard Tier for the number of days specified through `num_retention_days`,
 
-            retention plans specified in your organization''s contract/subscriptions.
+            and then stored in Flex Tier until the number of days specified in `num_flex_logs_retention_days`
+            is reached.
+
+            The available values depend on retention plans specified in your organization''s
+            contract/subscriptions.
+
+
+            **Note**: Changing this value affects all logs already in this index.
+            It may also affect billing.'
+          example: 360
+          format: int64
+          type: integer
+        num_retention_days:
+          description: 'The number of days logs are stored in Standard Tier before
+            aging into the Flex Tier or being deleted from the index.
 
+            The available values depend on retention plans specified in your organization''s
+            contract/subscriptions.
 
-            **Note:** Changing the retention for an index adjusts the length of retention
-            for all logs
 
-            already in this index. It may also affect billing.'
+            **Note**: Changing this value affects all logs already in this index.
+            It may also affect billing.'
           example: 15
           format: int64
           type: integer
diff --git a/examples/v1/logs-indexes/CreateLogsIndex.py b/examples/v1/logs-indexes/CreateLogsIndex.py
index 5dbcaac11b..c6d18c4c03 100644
--- a/examples/v1/logs-indexes/CreateLogsIndex.py
+++ b/examples/v1/logs-indexes/CreateLogsIndex.py
@@ -30,6 +30,7 @@
         query="source:python",
     ),
     name="main",
+    num_flex_logs_retention_days=360,
     num_retention_days=15,
 )
 
diff --git a/examples/v1/logs-indexes/UpdateLogsIndex.py b/examples/v1/logs-indexes/UpdateLogsIndex.py
index e0c3104fde..85d58bdaf7 100644
--- a/examples/v1/logs-indexes/UpdateLogsIndex.py
+++ b/examples/v1/logs-indexes/UpdateLogsIndex.py
@@ -30,6 +30,7 @@
     filter=LogsFilter(
         query="source:python",
     ),
+    num_flex_logs_retention_days=360,
     num_retention_days=15,
 )
 
diff --git a/src/datadog_api_client/v1/model/logs_index.py b/src/datadog_api_client/v1/model/logs_index.py
index 59368cad9e..07f210be98 100644
--- a/src/datadog_api_client/v1/model/logs_index.py
+++ b/src/datadog_api_client/v1/model/logs_index.py
@@ -41,6 +41,7 @@ def openapi_types(_):
             "filter": (LogsFilter,),
             "is_rate_limited": (bool,),
             "name": (str,),
+            "num_flex_logs_retention_days": (int,),
             "num_retention_days": (int,),
         }
 
@@ -52,6 +53,7 @@ def openapi_types(_):
         "filter": "filter",
         "is_rate_limited": "is_rate_limited",
         "name": "name",
+        "num_flex_logs_retention_days": "num_flex_logs_retention_days",
         "num_retention_days": "num_retention_days",
     }
     read_only_vars = {
@@ -67,6 +69,7 @@ def __init__(
         daily_limit_warning_threshold_percentage: Union[float, UnsetType] = unset,
         exclusion_filters: Union[List[LogsExclusion], UnsetType] = unset,
         is_rate_limited: Union[bool, UnsetType] = unset,
+        num_flex_logs_retention_days: Union[int, UnsetType] = unset,
         num_retention_days: Union[int, UnsetType] = unset,
         **kwargs,
     ):
@@ -97,8 +100,14 @@ def __init__(
         :param name: The name of the index.
         :type name: str
 
-        :param num_retention_days: The number of days before logs are deleted from this index. Available values depend on
-            retention plans specified in your organization's contract/subscriptions.
+        :param num_flex_logs_retention_days: The total number of days logs are stored in Standard and Flex Tier before being deleted from the index.
+            If Standard Tier is enabled on this index, logs are first retained in Standard Tier for the number of days specified through ``num_retention_days`` ,
+            and then stored in Flex Tier until the number of days specified in ``num_flex_logs_retention_days`` is reached.
+            The available values depend on retention plans specified in your organization's contract/subscriptions.
+        :type num_flex_logs_retention_days: int, optional
+
+        :param num_retention_days: The number of days logs are stored in Standard Tier before aging into the Flex Tier or being deleted from the index.
+            The available values depend on retention plans specified in your organization's contract/subscriptions.
         :type num_retention_days: int, optional
         """
         if daily_limit is not unset:
@@ -111,6 +120,8 @@ def __init__(
             kwargs["exclusion_filters"] = exclusion_filters
         if is_rate_limited is not unset:
             kwargs["is_rate_limited"] = is_rate_limited
+        if num_flex_logs_retention_days is not unset:
+            kwargs["num_flex_logs_retention_days"] = num_flex_logs_retention_days
         if num_retention_days is not unset:
             kwargs["num_retention_days"] = num_retention_days
         super().__init__(kwargs)
diff --git a/src/datadog_api_client/v1/model/logs_index_update_request.py b/src/datadog_api_client/v1/model/logs_index_update_request.py
index c435ee46d4..5e91b459dd 100644
--- a/src/datadog_api_client/v1/model/logs_index_update_request.py
+++ b/src/datadog_api_client/v1/model/logs_index_update_request.py
@@ -40,6 +40,7 @@ def openapi_types(_):
             "disable_daily_limit": (bool,),
             "exclusion_filters": ([LogsExclusion],),
             "filter": (LogsFilter,),
+            "num_flex_logs_retention_days": (int,),
             "num_retention_days": (int,),
         }
 
@@ -50,6 +51,7 @@ def openapi_types(_):
         "disable_daily_limit": "disable_daily_limit",
         "exclusion_filters": "exclusion_filters",
         "filter": "filter",
+        "num_flex_logs_retention_days": "num_flex_logs_retention_days",
         "num_retention_days": "num_retention_days",
     }
 
@@ -61,6 +63,7 @@ def __init__(
         daily_limit_warning_threshold_percentage: Union[float, UnsetType] = unset,
         disable_daily_limit: Union[bool, UnsetType] = unset,
         exclusion_filters: Union[List[LogsExclusion], UnsetType] = unset,
+        num_flex_logs_retention_days: Union[int, UnsetType] = unset,
         num_retention_days: Union[int, UnsetType] = unset,
         **kwargs,
     ):
@@ -89,11 +92,18 @@ def __init__(
         :param filter: Filter for logs.
         :type filter: LogsFilter
 
-        :param num_retention_days: The number of days before logs are deleted from this index. Available values depend on
-            retention plans specified in your organization's contract/subscriptions.
+        :param num_flex_logs_retention_days: The total number of days logs are stored in Standard and Flex Tier before being deleted from the index.
+            If Standard Tier is enabled on this index, logs are first retained in Standard Tier for the number of days specified through ``num_retention_days`` ,
+            and then stored in Flex Tier until the number of days specified in ``num_flex_logs_retention_days`` is reached.
+            The available values depend on retention plans specified in your organization's contract/subscriptions.
 
-            **Note:** Changing the retention for an index adjusts the length of retention for all logs
-            already in this index. It may also affect billing.
+            **Note** : Changing this value affects all logs already in this index. It may also affect billing.
+        :type num_flex_logs_retention_days: int, optional
+
+        :param num_retention_days: The number of days logs are stored in Standard Tier before aging into the Flex Tier or being deleted from the index.
+            The available values depend on retention plans specified in your organization's contract/subscriptions.
+
+            **Note** : Changing this value affects all logs already in this index. It may also affect billing.
         :type num_retention_days: int, optional
         """
         if daily_limit is not unset:
@@ -106,6 +116,8 @@ def __init__(
             kwargs["disable_daily_limit"] = disable_daily_limit
         if exclusion_filters is not unset:
             kwargs["exclusion_filters"] = exclusion_filters
+        if num_flex_logs_retention_days is not unset:
+            kwargs["num_flex_logs_retention_days"] = num_flex_logs_retention_days
         if num_retention_days is not unset:
             kwargs["num_retention_days"] = num_retention_days
         super().__init__(kwargs)
diff --git a/tests/v1/features/logs_indexes.feature b/tests/v1/features/logs_indexes.feature
index 8d982e9546..76b2d87a49 100644
--- a/tests/v1/features/logs_indexes.feature
+++ b/tests/v1/features/logs_indexes.feature
@@ -12,14 +12,14 @@ Feature: Logs Indexes
   @generated @skip @team:DataDog/logs-backend
   Scenario: Create an index returns "Invalid Parameter Error" response
     Given new "CreateLogsIndex" request
-    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "name": "main", "num_retention_days": 15}
+    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "name": "main", "num_flex_logs_retention_days": 360, "num_retention_days": 15}
     When the request is sent
     Then the response status is 400 Invalid Parameter Error
 
   @generated @skip @team:DataDog/logs-backend
   Scenario: Create an index returns "OK" response
     Given new "CreateLogsIndex" request
-    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "name": "main", "num_retention_days": 15}
+    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "name": "main", "num_flex_logs_retention_days": 360, "num_retention_days": 15}
     When the request is sent
     Then the response status is 200 OK
 
@@ -53,7 +53,7 @@ Feature: Logs Indexes
   Scenario: Update an index returns "Invalid Parameter Error" response
     Given new "UpdateLogsIndex" request
     And request contains "name" parameter from "REPLACE.ME"
-    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "disable_daily_limit": false, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "num_retention_days": 15}
+    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "disable_daily_limit": false, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "num_flex_logs_retention_days": 360, "num_retention_days": 15}
     When the request is sent
     Then the response status is 400 Invalid Parameter Error
 
@@ -61,7 +61,7 @@ Feature: Logs Indexes
   Scenario: Update an index returns "OK" response
     Given new "UpdateLogsIndex" request
     And request contains "name" parameter from "REPLACE.ME"
-    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "disable_daily_limit": false, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "num_retention_days": 15}
+    And body with value {"daily_limit": 300000000, "daily_limit_reset": {"reset_time": "14:00", "reset_utc_offset": "+02:00"}, "daily_limit_warning_threshold_percentage": 70, "disable_daily_limit": false, "exclusion_filters": [{"filter": {"query": "*", "sample_rate": 1.0}, "name": "payment"}], "filter": {"query": "source:python"}, "num_flex_logs_retention_days": 360, "num_retention_days": 15}
     When the request is sent
     Then the response status is 200 OK