diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index 9471d313bb..e5fd612da2 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -55450,6 +55450,9 @@
           "_source": {
             "type": "object"
           },
+          "_rank": {
+            "type": "number"
+          },
           "_seq_no": {
             "$ref": "#/components/schemas/_types:SequenceNumber"
           },
@@ -94667,7 +94670,7 @@
                 "description": "How much influence documents in individual result sets per query have over the final ranked result set",
                 "type": "number"
               },
-              "window_size": {
+              "rank_window_size": {
                 "description": "Size of the individual result sets per query",
                 "type": "number"
               }
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index 623caeee81..5d19bc6cd8 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -32388,6 +32388,9 @@
           "_source": {
             "type": "object"
           },
+          "_rank": {
+            "type": "number"
+          },
           "_seq_no": {
             "$ref": "#/components/schemas/_types:SequenceNumber"
           },
@@ -60464,7 +60467,7 @@
                 "description": "How much influence documents in individual result sets per query have over the final ranked result set",
                 "type": "number"
               },
-              "window_size": {
+              "rank_window_size": {
                 "description": "Size of the individual result sets per query",
                 "type": "number"
               }
diff --git a/output/schema/schema-serverless.json b/output/schema/schema-serverless.json
index 870569c69d..f4333ede28 100644
--- a/output/schema/schema-serverless.json
+++ b/output/schema/schema-serverless.json
@@ -52085,7 +52085,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L106-L140"
+      "specLocation": "_global/search/_types/hits.ts#L107-L141"
     },
     {
       "kind": "type_alias",
@@ -67710,7 +67710,7 @@
         "name": "TrackHits",
         "namespace": "_global.search._types"
       },
-      "specLocation": "_global/search/_types/hits.ts#L142-L150",
+      "specLocation": "_global/search/_types/hits.ts#L143-L151",
       "type": {
         "items": [
           {
@@ -69834,7 +69834,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L66-L72"
+      "specLocation": "_global/search/_types/hits.ts#L67-L73"
     },
     {
       "kind": "interface",
@@ -69866,7 +69866,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L94-L97"
+      "specLocation": "_global/search/_types/hits.ts#L95-L98"
     },
     {
       "kind": "enum",
@@ -69884,7 +69884,7 @@
         "name": "TotalHitsRelation",
         "namespace": "_global.search._types"
       },
-      "specLocation": "_global/search/_types/hits.ts#L99-L104"
+      "specLocation": "_global/search/_types/hits.ts#L100-L105"
     },
     {
       "generics": [
@@ -70129,6 +70129,17 @@
             }
           }
         },
+        {
+          "name": "_rank",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "integer",
+              "namespace": "_types"
+            }
+          }
+        },
         {
           "name": "_seq_no",
           "required": false,
@@ -70174,7 +70185,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L40-L64"
+      "specLocation": "_global/search/_types/hits.ts#L40-L65"
     },
     {
       "kind": "interface",
@@ -70292,7 +70303,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L84-L86"
+      "specLocation": "_global/search/_types/hits.ts#L85-L87"
     },
     {
       "kind": "interface",
@@ -70335,7 +70346,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L88-L92"
+      "specLocation": "_global/search/_types/hits.ts#L89-L93"
     },
     {
       "description": "The aggregation name as returned from the server. Depending whether typed_keys is specified this could come back\nin the form of `name#type` instead of simply `name`",
@@ -133938,7 +133949,7 @@
         },
         {
           "description": "Size of the individual result sets per query",
-          "name": "window_size",
+          "name": "rank_window_size",
           "required": false,
           "type": {
             "kind": "instance_of",
diff --git a/output/schema/schema.json b/output/schema/schema.json
index 91247c35e2..5be395eb30 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -36742,6 +36742,17 @@
             }
           }
         },
+        {
+          "name": "_rank",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "integer",
+              "namespace": "_types"
+            }
+          }
+        },
         {
           "name": "_seq_no",
           "required": false,
@@ -36787,7 +36798,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L40-L64"
+      "specLocation": "_global/search/_types/hits.ts#L40-L65"
     },
     {
       "generics": [
@@ -36873,7 +36884,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L66-L72"
+      "specLocation": "_global/search/_types/hits.ts#L67-L73"
     },
     {
       "kind": "interface",
@@ -37080,7 +37091,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L106-L140"
+      "specLocation": "_global/search/_types/hits.ts#L107-L141"
     },
     {
       "kind": "interface",
@@ -37106,7 +37117,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L84-L86"
+      "specLocation": "_global/search/_types/hits.ts#L85-L87"
     },
     {
       "kind": "interface",
@@ -37255,7 +37266,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L88-L92"
+      "specLocation": "_global/search/_types/hits.ts#L89-L93"
     },
     {
       "inherits": {
@@ -39088,7 +39099,7 @@
           }
         }
       ],
-      "specLocation": "_global/search/_types/hits.ts#L94-L97"
+      "specLocation": "_global/search/_types/hits.ts#L95-L98"
     },
     {
       "kind": "enum",
@@ -39106,7 +39117,7 @@
         "name": "TotalHitsRelation",
         "namespace": "_global.search._types"
       },
-      "specLocation": "_global/search/_types/hits.ts#L99-L104"
+      "specLocation": "_global/search/_types/hits.ts#L100-L105"
     },
     {
       "codegenNames": [
@@ -39119,7 +39130,7 @@
         "name": "TrackHits",
         "namespace": "_global.search._types"
       },
-      "specLocation": "_global/search/_types/hits.ts#L142-L150",
+      "specLocation": "_global/search/_types/hits.ts#L143-L151",
       "type": {
         "items": [
           {
@@ -47981,7 +47992,7 @@
         },
         {
           "description": "Size of the individual result sets per query",
-          "name": "window_size",
+          "name": "rank_window_size",
           "required": false,
           "type": {
             "kind": "instance_of",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index e753836395..c7619ceb75 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -1469,6 +1469,7 @@ export interface SearchHit<TDocument = unknown> {
   _node?: string
   _routing?: string
   _source?: TDocument
+  _rank?: integer
   _seq_no?: SequenceNumber
   _primary_term?: long
   _version?: VersionNumber
@@ -2586,7 +2587,7 @@ export type Routing = string
 
 export interface RrfRank {
   rank_constant?: long
-  window_size?: long
+  rank_window_size?: long
 }
 
 export type ScalarValue = long | double | string | boolean | null
diff --git a/specification/_global/search/_types/hits.ts b/specification/_global/search/_types/hits.ts
index a4300dd5c1..c98adbdd69 100644
--- a/specification/_global/search/_types/hits.ts
+++ b/specification/_global/search/_types/hits.ts
@@ -57,6 +57,7 @@ export class Hit<TDocument> {
   _node?: string
   _routing?: string
   _source?: TDocument
+  _rank?: integer
   _seq_no?: SequenceNumber
   _primary_term?: long
   _version?: VersionNumber
diff --git a/specification/_types/Rank.ts b/specification/_types/Rank.ts
index c19e3f5de4..c24bbf11da 100644
--- a/specification/_types/Rank.ts
+++ b/specification/_types/Rank.ts
@@ -33,5 +33,5 @@ export class RrfRank extends RankBase {
   /** How much influence documents in individual result sets per query have over the final ranked result set  */
   rank_constant?: long
   /** Size of the individual result sets per query */
-  window_size?: long
+  rank_window_size?: long
 }