diff --git a/.generated-info b/.generated-info
index ea5e89e8c103..de1a0f4e8c20 100644
--- a/.generated-info
+++ b/.generated-info
@@ -1,4 +1,4 @@
 {
-  "spec_repo_commit": "205813d",
-  "generated": "2025-08-25 08:41:30.486"
+  "spec_repo_commit": "c3b2b7d",
+  "generated": "2025-08-25 10:18:04.330"
 }
diff --git a/.generator/schemas/v1/openapi.yaml b/.generator/schemas/v1/openapi.yaml
index f6e0e21ed71a..dacd4a02b1d9 100644
--- a/.generator/schemas/v1/openapi.yaml
+++ b/.generator/schemas/v1/openapi.yaml
@@ -5123,6 +5123,12 @@ components:
         error:
           $ref: '#/components/schemas/LogsAPIError'
       type: object
+    LogsAPILimitReachedResponse:
+      description: Response returned by the Logs API when the max limit has been reached.
+      properties:
+        error:
+          $ref: '#/components/schemas/LogsAPIError'
+      type: object
     LogsArithmeticProcessor:
       description: "Use the Arithmetic Processor to add a new attribute (without spaces
         or special characters\nin the new attribute name) to a log with the result
@@ -29444,6 +29450,12 @@ paths:
               schema:
                 $ref: '#/components/schemas/APIErrorResponse'
           description: Forbidden
+        '422':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/LogsAPILimitReachedResponse'
+          description: Unprocessable Entity
         '429':
           $ref: '#/components/responses/TooManyRequestsResponse'
       summary: Create an index
diff --git a/features/v1/logs_indexes.feature b/features/v1/logs_indexes.feature
index 635c2399c5bf..e94fea2c62f4 100644
--- a/features/v1/logs_indexes.feature
+++ b/features/v1/logs_indexes.feature
@@ -22,6 +22,13 @@ Feature: Logs Indexes
     When the request is sent
     Then the response status is 200 OK
 
+  @generated @skip @team:DataDog/logs-backend @team:DataDog/logs-core
+  Scenario: Create an index returns "Unprocessable Entity" 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_flex_logs_retention_days": 360, "num_retention_days": 15}
+    When the request is sent
+    Then the response status is 422 Unprocessable Entity
+
   @generated @skip @team:DataDog/logs-backend @team:DataDog/logs-core
   Scenario: Delete an index returns "Not Found" response
     Given new "DeleteLogsIndex" request
diff --git a/lib/datadog_api_client/inflector.rb b/lib/datadog_api_client/inflector.rb
index 9ec3071709b5..7d7d1985f89c 100644
--- a/lib/datadog_api_client/inflector.rb
+++ b/lib/datadog_api_client/inflector.rb
@@ -225,6 +225,7 @@ def overrides
           "v1.log_query_definition_search" => "LogQueryDefinitionSearch",
           "v1.logs_api_error" => "LogsAPIError",
           "v1.logs_api_error_response" => "LogsAPIErrorResponse",
+          "v1.logs_api_limit_reached_response" => "LogsAPILimitReachedResponse",
           "v1.logs_arithmetic_processor" => "LogsArithmeticProcessor",
           "v1.logs_arithmetic_processor_type" => "LogsArithmeticProcessorType",
           "v1.logs_array_processor" => "LogsArrayProcessor",
diff --git a/lib/datadog_api_client/v1/models/logs_api_limit_reached_response.rb b/lib/datadog_api_client/v1/models/logs_api_limit_reached_response.rb
new file mode 100644
index 000000000000..c8e3e29a88f0
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/logs_api_limit_reached_response.rb
@@ -0,0 +1,105 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ 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 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # Response returned by the Logs API when the max limit has been reached.
+  class LogsAPILimitReachedResponse
+    include BaseGenericModel
+
+    # Error returned by the Logs API
+    attr_accessor :error
+
+    attr_accessor :additional_properties
+
+    # Attribute mapping from ruby-style variable name to JSON key.
+    # @!visibility private
+    def self.attribute_map
+      {
+        :'error' => :'error'
+      }
+    end
+
+    # Attribute type mapping.
+    # @!visibility private
+    def self.openapi_types
+      {
+        :'error' => :'LogsAPIError'
+      }
+    end
+
+    # Initializes the object
+    # @param attributes [Hash] Model attributes in the form of hash
+    # @!visibility private
+    def initialize(attributes = {})
+      if (!attributes.is_a?(Hash))
+        fail ArgumentError, "The input argument (attributes) must be a hash in `DatadogAPIClient::V1::LogsAPILimitReachedResponse` initialize method"
+      end
+
+      self.additional_properties = {}
+      # check to see if the attribute exists and convert string to symbol for hash key
+      attributes = attributes.each_with_object({}) { |(k, v), h|
+        if (!self.class.attribute_map.key?(k.to_sym))
+          self.additional_properties[k.to_sym] = v
+        else
+          h[k.to_sym] = v
+        end
+      }
+
+      if attributes.key?(:'error')
+        self.error = attributes[:'error']
+      end
+    end
+
+    # Returns the object in the form of hash, with additionalProperties support.
+    # @return [Hash] Returns the object in the form of hash
+    # @!visibility private
+    def to_hash
+      hash = {}
+      self.class.attribute_map.each_pair do |attr, param|
+        value = self.send(attr)
+        if value.nil?
+          is_nullable = self.class.openapi_nullable.include?(attr)
+          next if !is_nullable || (is_nullable && !instance_variable_defined?(:"@#{attr}"))
+        end
+
+        hash[param] = _to_hash(value)
+      end
+      self.additional_properties.each_pair do |attr, value|
+        hash[attr] = value
+      end
+      hash
+    end
+
+    # Checks equality by comparing each attribute.
+    # @param o [Object] Object to be compared
+    # @!visibility private
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          error == o.error &&
+          additional_properties == o.additional_properties
+    end
+
+    # Calculates hash code according to all attributes.
+    # @return [Integer] Hash code
+    # @!visibility private
+    def hash
+      [error, additional_properties].hash
+    end
+  end
+end