diff --git a/output/schema/schema.json b/output/schema/schema.json
index 4ce31fb384..467e46179c 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -127301,7 +127301,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L769-L784"
+      "specLocation": "cluster/stats/types.ts#L783-L798"
     },
     {
       "kind": "interface",
@@ -127347,7 +127347,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L855-L862"
+      "specLocation": "cluster/stats/types.ts#L869-L876"
     },
     {
       "kind": "interface",
@@ -127545,7 +127545,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L819-L844"
+      "specLocation": "cluster/stats/types.ts#L833-L858"
     },
     {
       "kind": "interface",
@@ -127618,7 +127618,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L846-L853"
+      "specLocation": "cluster/stats/types.ts#L860-L867"
     },
     {
       "kind": "interface",
@@ -127771,7 +127771,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L315-L352"
+      "specLocation": "cluster/stats/types.ts#L329-L366"
     },
     {
       "kind": "interface",
@@ -128307,7 +128307,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L367-L370"
+      "specLocation": "cluster/stats/types.ts#L381-L384"
     },
     {
       "kind": "interface",
@@ -128389,7 +128389,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L372-L393"
+      "specLocation": "cluster/stats/types.ts#L386-L407"
     },
     {
       "kind": "interface",
@@ -128447,7 +128447,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L395-L412"
+      "specLocation": "cluster/stats/types.ts#L409-L426"
     },
     {
       "kind": "interface",
@@ -128541,7 +128541,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L414-L444"
+      "specLocation": "cluster/stats/types.ts#L428-L458"
     },
     {
       "kind": "interface",
@@ -128597,7 +128597,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L446-L455"
+      "specLocation": "cluster/stats/types.ts#L460-L469"
     },
     {
       "kind": "interface",
@@ -128789,7 +128789,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L457-L478"
+      "specLocation": "cluster/stats/types.ts#L471-L492"
     },
     {
       "kind": "interface",
@@ -128969,7 +128969,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L480-L513"
+      "specLocation": "cluster/stats/types.ts#L494-L527"
     },
     {
       "kind": "interface",
@@ -129060,7 +129060,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L526-L553"
+      "specLocation": "cluster/stats/types.ts#L540-L567"
     },
     {
       "kind": "interface",
@@ -129094,7 +129094,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L515-L524"
+      "specLocation": "cluster/stats/types.ts#L529-L538"
     },
     {
       "kind": "interface",
@@ -129128,7 +129128,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L555-L564"
+      "specLocation": "cluster/stats/types.ts#L569-L578"
     },
     {
       "kind": "interface",
@@ -129162,7 +129162,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L566-L575"
+      "specLocation": "cluster/stats/types.ts#L580-L589"
     },
     {
       "kind": "interface",
@@ -129196,7 +129196,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L577-L586"
+      "specLocation": "cluster/stats/types.ts#L591-L600"
     },
     {
       "kind": "interface",
@@ -129218,7 +129218,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L588-L594"
+      "specLocation": "cluster/stats/types.ts#L602-L608"
     },
     {
       "kind": "interface",
@@ -129264,7 +129264,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L596-L612"
+      "specLocation": "cluster/stats/types.ts#L610-L626"
     },
     {
       "kind": "interface",
@@ -129338,7 +129338,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L614-L620"
+      "specLocation": "cluster/stats/types.ts#L628-L634"
     },
     {
       "kind": "interface",
@@ -129384,7 +129384,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L622-L635"
+      "specLocation": "cluster/stats/types.ts#L636-L649"
     },
     {
       "kind": "interface",
@@ -129427,7 +129427,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L637-L640"
+      "specLocation": "cluster/stats/types.ts#L651-L654"
     },
     {
       "kind": "interface",
@@ -129580,7 +129580,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L166-L178"
+      "specLocation": "cluster/stats/types.ts#L180-L192"
     },
     {
       "kind": "interface",
@@ -129612,7 +129612,70 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L157-L160"
+      "specLocation": "cluster/stats/types.ts#L171-L174"
+    },
+    {
+      "kind": "interface",
+      "name": {
+        "name": "ExtendedRetrieversSearchUsage",
+        "namespace": "cluster.stats"
+      },
+      "properties": [
+        {
+          "name": "text_similarity_reranker",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "ExtendedTextSimilarityRetrieverUsage",
+              "namespace": "cluster.stats"
+            }
+          }
+        }
+      ],
+      "specLocation": "cluster/stats/types.ts#L163-L165"
+    },
+    {
+      "kind": "interface",
+      "name": {
+        "name": "ExtendedSearchUsage",
+        "namespace": "cluster.stats"
+      },
+      "properties": [
+        {
+          "name": "retrievers",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "ExtendedRetrieversSearchUsage",
+              "namespace": "cluster.stats"
+            }
+          }
+        }
+      ],
+      "specLocation": "cluster/stats/types.ts#L159-L161"
+    },
+    {
+      "kind": "interface",
+      "name": {
+        "name": "ExtendedTextSimilarityRetrieverUsage",
+        "namespace": "cluster.stats"
+      },
+      "properties": [
+        {
+          "name": "chunk_rescorer",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "long",
+              "namespace": "_types"
+            }
+          }
+        }
+      ],
+      "specLocation": "cluster/stats/types.ts#L167-L169"
     },
     {
       "kind": "interface",
@@ -129781,7 +129844,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L211-L254"
+      "specLocation": "cluster/stats/types.ts#L225-L268"
     },
     {
       "kind": "interface",
@@ -129892,7 +129955,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L180-L209"
+      "specLocation": "cluster/stats/types.ts#L194-L223"
     },
     {
       "kind": "interface",
@@ -129913,7 +129976,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L765-L767"
+      "specLocation": "cluster/stats/types.ts#L779-L781"
     },
     {
       "kind": "interface",
@@ -129978,7 +130041,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L359-L365"
+      "specLocation": "cluster/stats/types.ts#L373-L379"
     },
     {
       "kind": "interface",
@@ -130024,7 +130087,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L700-L713"
+      "specLocation": "cluster/stats/types.ts#L714-L727"
     },
     {
       "kind": "interface",
@@ -130166,7 +130229,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L715-L763"
+      "specLocation": "cluster/stats/types.ts#L729-L777"
     },
     {
       "kind": "interface",
@@ -130220,7 +130283,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L665-L670"
+      "specLocation": "cluster/stats/types.ts#L679-L684"
     },
     {
       "kind": "interface",
@@ -130413,7 +130476,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L786-L817"
+      "specLocation": "cluster/stats/types.ts#L800-L831"
     },
     {
       "kind": "interface",
@@ -130500,7 +130563,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L672-L680"
+      "specLocation": "cluster/stats/types.ts#L686-L694"
     },
     {
       "kind": "interface",
@@ -130565,7 +130628,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L682-L687"
+      "specLocation": "cluster/stats/types.ts#L696-L701"
     },
     {
       "kind": "request",
@@ -130854,7 +130917,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L256-L313"
+      "specLocation": "cluster/stats/types.ts#L270-L327"
     },
     {
       "kind": "interface",
@@ -130961,9 +131024,31 @@
               }
             }
           }
+        },
+        {
+          "name": "extended",
+          "required": true,
+          "type": {
+            "kind": "dictionary_of",
+            "key": {
+              "kind": "instance_of",
+              "type": {
+                "name": "Name",
+                "namespace": "_types"
+              }
+            },
+            "singleKey": false,
+            "value": {
+              "kind": "instance_of",
+              "type": {
+                "name": "ExtendedSearchUsage",
+                "namespace": "cluster.stats"
+              }
+            }
+          }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L149-L155"
+      "specLocation": "cluster/stats/types.ts#L149-L157"
     },
     {
       "kind": "enum",
@@ -130997,7 +131082,7 @@
         "name": "ShardState",
         "namespace": "cluster.stats"
       },
-      "specLocation": "cluster/stats/types.ts#L689-L698"
+      "specLocation": "cluster/stats/types.ts#L703-L712"
     },
     {
       "kind": "interface",
@@ -131067,7 +131152,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L642-L663"
+      "specLocation": "cluster/stats/types.ts#L656-L677"
     },
     {
       "kind": "interface",
@@ -131088,7 +131173,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L162-L164"
+      "specLocation": "cluster/stats/types.ts#L176-L178"
     },
     {
       "kind": "interface",
@@ -131268,7 +131353,7 @@
           }
         }
       ],
-      "specLocation": "cluster/stats/types.ts#L354-L357"
+      "specLocation": "cluster/stats/types.ts#L368-L371"
     },
     {
       "kind": "interface",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index d1fe73230b..4d24bb2e5b 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -10106,6 +10106,18 @@ export interface ClusterStatsDenseVectorStats {
   off_heap?: ClusterStatsDenseVectorOffHeapStats
 }
 
+export interface ClusterStatsExtendedRetrieversSearchUsage {
+  text_similarity_reranker?: ClusterStatsExtendedTextSimilarityRetrieverUsage
+}
+
+export interface ClusterStatsExtendedSearchUsage {
+  retrievers?: ClusterStatsExtendedRetrieversSearchUsage
+}
+
+export interface ClusterStatsExtendedTextSimilarityRetrieverUsage {
+  chunk_rescorer?: long
+}
+
 export interface ClusterStatsFieldTypes {
   name: Name
   count: integer
@@ -10233,6 +10245,7 @@ export interface ClusterStatsSearchUsageStats {
   rescorers: Record<Name, long>
   sections: Record<Name, long>
   retrievers: Record<Name, long>
+  extended: Record<Name, ClusterStatsExtendedSearchUsage>
 }
 
 export type ClusterStatsShardState = 'INIT' | 'SUCCESS' | 'FAILED' | 'ABORTED' | 'MISSING' | 'WAITING' | 'QUEUED' | 'PAUSED_FOR_NODE_REMOVAL'
diff --git a/specification/cluster/stats/types.ts b/specification/cluster/stats/types.ts
index f4383ae99c..daac97b9d6 100644
--- a/specification/cluster/stats/types.ts
+++ b/specification/cluster/stats/types.ts
@@ -152,6 +152,20 @@ export class SearchUsageStats {
   rescorers: Dictionary<Name, long>
   sections: Dictionary<Name, long>
   retrievers: Dictionary<Name, long>
+  /* @availability stack since=9.2.0 */
+  extended: Dictionary<Name, ExtendedSearchUsage>
+}
+
+export class ExtendedSearchUsage {
+  retrievers?: ExtendedRetrieversSearchUsage
+}
+
+export class ExtendedRetrieversSearchUsage {
+  text_similarity_reranker?: ExtendedTextSimilarityRetrieverUsage
+}
+
+export class ExtendedTextSimilarityRetrieverUsage {
+  chunk_rescorer?: long
 }
 
 export class DenseVectorStats {