diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/indices/get_data_stream_settings.rb b/elasticsearch-api/lib/elasticsearch/api/actions/indices/get_data_stream_settings.rb
new file mode 100644
index 0000000000..ba3a43c132
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/indices/get_data_stream_settings.rb
@@ -0,0 +1,75 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# This code was automatically generated from the Elasticsearch Specification
+# See https://github.com/elastic/elasticsearch-specification
+# See Elasticsearch::ES_SPECIFICATION_COMMIT for commit hash.
+module Elasticsearch
+  module API
+    module Indices
+      module Actions
+        # Get data stream settings.
+        # Get setting information for one or more data streams.
+        #
+        # @option arguments [String, Array] :name A comma-separated list of data streams or data stream patterns. Supports wildcards (`*`). (*Required*)
+        # @option arguments [Time] :master_timeout The period to wait for a connection to the master node. If no response is
+        #  received before the timeout expires, the request fails and returns an
+        #  error. Server default: 30s.
+        # @option arguments [Boolean] :error_trace When set to `true` Elasticsearch will include the full stack trace of errors
+        #  when they occur.
+        # @option arguments [String] :filter_path Comma-separated list of filters in dot notation which reduce the response
+        #  returned by Elasticsearch.
+        # @option arguments [Boolean] :human When set to `true` will return statistics in a format suitable for humans.
+        #  For example `"exists_time": "1h"` for humans and
+        #  `"eixsts_time_in_millis": 3600000` for computers. When disabled the human
+        #  readable values will be omitted. This makes sense for responses being consumed
+        #  only by machines.
+        # @option arguments [Boolean] :pretty If set to `true` the returned JSON will be "pretty-formatted". Only use
+        #  this option for debugging only.
+        # @option arguments [Hash] :headers Custom HTTP headers
+        #
+        # @see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-indices-get-data-stream-settings
+        #
+        def get_data_stream_settings(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'indices.get_data_stream_settings' }
+
+          defined_params = [:name].each_with_object({}) do |variable, set_variables|
+            set_variables[variable] = arguments[variable] if arguments.key?(variable)
+          end
+          request_opts[:defined_params] = defined_params unless defined_params.empty?
+
+          raise ArgumentError, "Required argument 'name' missing" unless arguments[:name]
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body = nil
+
+          _name = arguments.delete(:name)
+
+          method = Elasticsearch::API::HTTP_GET
+          path   = "_data_stream/#{Utils.listify(_name)}/_settings"
+          params = Utils.process_params(arguments)
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/indices/put_data_stream_settings.rb b/elasticsearch-api/lib/elasticsearch/api/actions/indices/put_data_stream_settings.rb
new file mode 100644
index 0000000000..10964f912d
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/indices/put_data_stream_settings.rb
@@ -0,0 +1,85 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# This code was automatically generated from the Elasticsearch Specification
+# See https://github.com/elastic/elasticsearch-specification
+# See Elasticsearch::ES_SPECIFICATION_COMMIT for commit hash.
+module Elasticsearch
+  module API
+    module Indices
+      module Actions
+        # Update data stream settings.
+        # This API can be used to override settings on specific data streams. These overrides will take precedence over what
+        # is specified in the template that the data stream matches. To prevent your data stream from getting into an invalid state,
+        # only certain settings are allowed. If possible, the setting change is applied to all
+        # backing indices. Otherwise, it will be applied when the data stream is next rolled over.
+        #
+        # @option arguments [String, Array] :name A comma-separated list of data streams or data stream patterns. (*Required*)
+        # @option arguments [Boolean] :dry_run If `true`, the request does not actually change the settings on any data streams or indices. Instead, it
+        #  simulates changing the settings and reports back to the user what would have happened had these settings
+        #  actually been applied.
+        # @option arguments [Time] :master_timeout The period to wait for a connection to the master node. If no response is
+        #  received before the timeout expires, the request fails and returns an
+        #  error. Server default: 30s.
+        # @option arguments [Time] :timeout The period to wait for a response. If no response is received before the
+        #   timeout expires, the request fails and returns an error. Server default: 30s.
+        # @option arguments [Boolean] :error_trace When set to `true` Elasticsearch will include the full stack trace of errors
+        #  when they occur.
+        # @option arguments [String] :filter_path Comma-separated list of filters in dot notation which reduce the response
+        #  returned by Elasticsearch.
+        # @option arguments [Boolean] :human When set to `true` will return statistics in a format suitable for humans.
+        #  For example `"exists_time": "1h"` for humans and
+        #  `"eixsts_time_in_millis": 3600000` for computers. When disabled the human
+        #  readable values will be omitted. This makes sense for responses being consumed
+        #  only by machines.
+        # @option arguments [Boolean] :pretty If set to `true` the returned JSON will be "pretty-formatted". Only use
+        #  this option for debugging only.
+        # @option arguments [Hash] :headers Custom HTTP headers
+        # @option arguments [Hash] :body settings
+        #
+        # @see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-indices-put-data-stream-settings
+        #
+        def put_data_stream_settings(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'indices.put_data_stream_settings' }
+
+          defined_params = [:name].each_with_object({}) do |variable, set_variables|
+            set_variables[variable] = arguments[variable] if arguments.key?(variable)
+          end
+          request_opts[:defined_params] = defined_params unless defined_params.empty?
+
+          raise ArgumentError, "Required argument 'body' missing" unless arguments[:body]
+          raise ArgumentError, "Required argument 'name' missing" unless arguments[:name]
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body = arguments.delete(:body)
+
+          _name = arguments.delete(:name)
+
+          method = Elasticsearch::API::HTTP_PUT
+          path   = "_data_stream/#{Utils.listify(_name)}/_settings"
+          params = Utils.process_params(arguments)
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/inference/chat_completion_unified.rb b/elasticsearch-api/lib/elasticsearch/api/actions/inference/chat_completion_unified.rb
index a91666f15c..97ab9774a5 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/inference/chat_completion_unified.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/inference/chat_completion_unified.rb
@@ -25,8 +25,6 @@ module Actions
         # Perform chat completion inference
         # The chat completion inference API enables real-time responses for chat completion tasks by delivering answers incrementally, reducing response times during computation.
         # It only works with the `chat_completion` task type for `openai` and `elastic` inference services.
-        # IMPORTANT: The inference APIs enable you to use certain services, such as built-in machine learning models (ELSER, E5), models uploaded through Eland, Cohere, OpenAI, Azure, Google AI Studio, Google Vertex AI, Anthropic, Watsonx.ai, or Hugging Face.
-        # For built-in models and models uploaded through Eland, the inference APIs offer an alternative way to use and manage trained models. However, if you do not plan to use the inference APIs to use these models or if you want to use non-NLP models, use the machine learning trained model APIs.
         # NOTE: The `chat_completion` task type is only available within the _stream API and only supports streaming.
         # The Chat completion inference API and the Stream inference API differ in their response structure and capabilities.
         # The Chat completion inference API provides more comprehensive customization options through more fields and function calling support.
diff --git a/elasticsearch-api/lib/elasticsearch/api/version.rb b/elasticsearch-api/lib/elasticsearch/api/version.rb
index bb4120afd4..9cf550949a 100644
--- a/elasticsearch-api/lib/elasticsearch/api/version.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/version.rb
@@ -18,6 +18,6 @@
 module Elasticsearch
   module API
     VERSION = '9.0.0'.freeze
-    ES_SPECIFICATION_COMMIT = '00be10ac5ace4211ff41c0c640eb9b6ecaf10f07'.freeze
+    ES_SPECIFICATION_COMMIT = '0082673e9091ee92a3b7614c00dbfd9babd20b74'.freeze
   end
 end
diff --git a/elasticsearch-api/spec/unit/actions/indices/get_data_stream_settings_spec.rb b/elasticsearch-api/spec/unit/actions/indices/get_data_stream_settings_spec.rb
new file mode 100644
index 0000000000..4fa6057618
--- /dev/null
+++ b/elasticsearch-api/spec/unit/actions/indices/get_data_stream_settings_spec.rb
@@ -0,0 +1,37 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client.indices.get_data_stream_settings' do
+  let(:expected_args) do
+    [
+      'GET',
+      '_data_stream/foo/_settings',
+      {},
+      nil,
+      {},
+      { endpoint: 'indices.get_data_stream_settings', defined_params: { name: 'foo' } }
+    ]
+  end
+
+  let(:index) { 'foo' }
+
+  it 'performs the request' do
+    expect(client_double.indices.get_data_stream_settings(name: 'foo')).to be_a Elasticsearch::API::Response
+  end
+end
diff --git a/elasticsearch-api/spec/unit/actions/indices/put_data_stream_settings_spec.rb b/elasticsearch-api/spec/unit/actions/indices/put_data_stream_settings_spec.rb
new file mode 100644
index 0000000000..9d0990ae59
--- /dev/null
+++ b/elasticsearch-api/spec/unit/actions/indices/put_data_stream_settings_spec.rb
@@ -0,0 +1,35 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client.cluster#put_data_stream_settings' do
+  let(:expected_args) do
+    [
+      'PUT',
+      '_data_stream/foo/_settings',
+      {},
+      {},
+      {},
+      { endpoint: 'indices.put_data_stream_settings', defined_params: { name: 'foo' } }
+    ]
+  end
+
+  it 'performs the request' do
+    expect(client_double.indices.put_data_stream_settings(name: 'foo', body: {})).to be_a Elasticsearch::API::Response
+  end
+end