diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index f88d354873..b8234638b7 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -60813,6 +60813,10 @@
                 "description": "The number of nearest neighbor candidates to consider per shard",
                 "type": "number"
               },
+              "k": {
+                "description": "The final number of nearest neighbors to return as top hits",
+                "type": "number"
+              },
               "filter": {
                 "description": "Filters for the kNN search query",
                 "oneOf": [
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index c0ae885749..4d36a8160c 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -37343,6 +37343,10 @@
                 "description": "The number of nearest neighbor candidates to consider per shard",
                 "type": "number"
               },
+              "k": {
+                "description": "The final number of nearest neighbors to return as top hits",
+                "type": "number"
+              },
               "filter": {
                 "description": "Filters for the kNN search query",
                 "oneOf": [
diff --git a/output/schema/schema-serverless.json b/output/schema/schema-serverless.json
index b6d26d2a06..81efed3ac2 100644
--- a/output/schema/schema-serverless.json
+++ b/output/schema/schema-serverless.json
@@ -54825,6 +54825,18 @@
             }
           }
         },
+        {
+          "description": "The final number of nearest neighbors to return as top hits",
+          "name": "k",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "integer",
+              "namespace": "_types"
+            }
+          }
+        },
         {
           "description": "Filters for the kNN search query",
           "name": "filter",
@@ -54865,7 +54877,7 @@
           }
         }
       ],
-      "specLocation": "_types/Knn.ts#L54-L67"
+      "specLocation": "_types/Knn.ts#L54-L69"
     },
     {
       "kind": "type_alias",
@@ -54904,7 +54916,7 @@
           }
         }
       ],
-      "specLocation": "_types/Knn.ts#L69-L72",
+      "specLocation": "_types/Knn.ts#L71-L74",
       "variants": {
         "kind": "container"
       }
@@ -54939,7 +54951,7 @@
           }
         }
       ],
-      "specLocation": "_types/Knn.ts#L74-L77"
+      "specLocation": "_types/Knn.ts#L76-L79"
     },
     {
       "inherits": {
diff --git a/output/schema/schema.json b/output/schema/schema.json
index 58c12c21cf..eeb292f9fc 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -44317,6 +44317,18 @@
             }
           }
         },
+        {
+          "description": "The final number of nearest neighbors to return as top hits",
+          "name": "k",
+          "required": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "integer",
+              "namespace": "_types"
+            }
+          }
+        },
         {
           "description": "Filters for the kNN search query",
           "name": "filter",
@@ -44357,7 +44369,7 @@
           }
         }
       ],
-      "specLocation": "_types/Knn.ts#L54-L67"
+      "specLocation": "_types/Knn.ts#L54-L69"
     },
     {
       "inherits": {
@@ -45922,7 +45934,7 @@
           }
         }
       ],
-      "specLocation": "_types/Knn.ts#L69-L72",
+      "specLocation": "_types/Knn.ts#L71-L74",
       "variants": {
         "kind": "container"
       }
@@ -48403,7 +48415,7 @@
           }
         }
       ],
-      "specLocation": "_types/Knn.ts#L74-L77"
+      "specLocation": "_types/Knn.ts#L76-L79"
     },
     {
       "kind": "enum",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 47f10776c6..08b6dd051f 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -2363,6 +2363,7 @@ export interface KnnQuery extends QueryDslQueryBase {
   query_vector?: QueryVector
   query_vector_builder?: QueryVectorBuilder
   num_candidates?: integer
+  k?: integer
   filter?: QueryDslQueryContainer | QueryDslQueryContainer[]
   similarity?: float
 }
diff --git a/specification/_types/Knn.ts b/specification/_types/Knn.ts
index 461801bd31..cf9c71cfd7 100644
--- a/specification/_types/Knn.ts
+++ b/specification/_types/Knn.ts
@@ -60,6 +60,8 @@ export interface KnnQuery extends QueryBase {
   query_vector_builder?: QueryVectorBuilder
   /** The number of nearest neighbor candidates to consider per shard */
   num_candidates?: integer
+  /** The final number of nearest neighbors to return as top hits */
+  k?: integer
   /** Filters for the kNN search query */
   filter?: QueryContainer | QueryContainer[]
   /** The minimum similarity for a vector to be considered a match */