diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index edb393bddc..3984e8348e 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -86329,6 +86329,13 @@
                 "$ref": "#/components/schemas/_types.mapping.ChunkingSettings"
               }
             ]
+          },
+          "fields": {
+            "description": "Multi-fields allow the same string value to be indexed in multiple ways for different purposes, such as one\nfield for search and a multi-field for sorting and aggregations, or the same string value analyzed by different analyzers.",
+            "type": "object",
+            "additionalProperties": {
+              "$ref": "#/components/schemas/_types.mapping.Property"
+            }
           }
         },
         "required": [
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index 286c5c17d8..4f03b57ab3 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -57999,6 +57999,13 @@
                 "$ref": "#/components/schemas/_types.mapping.ChunkingSettings"
               }
             ]
+          },
+          "fields": {
+            "description": "Multi-fields allow the same string value to be indexed in multiple ways for different purposes, such as one\nfield for search and a multi-field for sorting and aggregations, or the same string value analyzed by different analyzers.",
+            "type": "object",
+            "additionalProperties": {
+              "$ref": "#/components/schemas/_types.mapping.Property"
+            }
           }
         },
         "required": [
diff --git a/output/schema/schema.json b/output/schema/schema.json
index dc4ce6863a..54a4ba7e49 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -83555,7 +83555,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L353-L384"
+      "specLocation": "_types/mapping/core.ts#L359-L390"
     },
     {
       "kind": "interface",
@@ -84783,7 +84783,7 @@
         "name": "IndexOptions",
         "namespace": "_types.mapping"
       },
-      "specLocation": "_types/mapping/core.ts#L309-L314"
+      "specLocation": "_types/mapping/core.ts#L315-L320"
     },
     {
       "kind": "interface",
@@ -85365,7 +85365,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L282-L307"
+      "specLocation": "_types/mapping/core.ts#L288-L313"
     },
     {
       "kind": "enum",
@@ -86418,7 +86418,7 @@
         "name": "RankVectorElementType",
         "namespace": "_types.mapping"
       },
-      "specLocation": "_types/mapping/core.ts#L386-L390"
+      "specLocation": "_types/mapping/core.ts#L392-L396"
     },
     {
       "kind": "interface",
@@ -86888,7 +86888,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L263-L274"
+      "specLocation": "_types/mapping/core.ts#L269-L280"
     },
     {
       "kind": "interface",
@@ -86963,9 +86963,34 @@
               "namespace": "_types.mapping"
             }
           }
+        },
+        {
+          "description": "Multi-fields allow the same string value to be indexed in multiple ways for different purposes, such as one\nfield for search and a multi-field for sorting and aggregations, or the same string value analyzed by different analyzers.",
+          "docId": "multi-fields",
+          "docUrl": "https://www.elastic.co/docs/reference/elasticsearch/mapping-reference/multi-fields",
+          "name": "fields",
+          "required": false,
+          "type": {
+            "kind": "dictionary_of",
+            "key": {
+              "kind": "instance_of",
+              "type": {
+                "name": "PropertyName",
+                "namespace": "_types"
+              }
+            },
+            "singleKey": false,
+            "value": {
+              "kind": "instance_of",
+              "type": {
+                "name": "Property",
+                "namespace": "_types.mapping"
+              }
+            }
+          }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L238-L261"
+      "specLocation": "_types/mapping/core.ts#L238-L267"
     },
     {
       "kind": "interface",
@@ -87473,7 +87498,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L316-L319"
+      "specLocation": "_types/mapping/core.ts#L322-L325"
     },
     {
       "kind": "interface",
@@ -87686,7 +87711,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L321-L338"
+      "specLocation": "_types/mapping/core.ts#L327-L344"
     },
     {
       "kind": "enum",
@@ -88093,7 +88118,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L340-L342"
+      "specLocation": "_types/mapping/core.ts#L346-L348"
     },
     {
       "kind": "interface",
@@ -88134,7 +88159,7 @@
           }
         }
       ],
-      "specLocation": "_types/mapping/core.ts#L344-L351"
+      "specLocation": "_types/mapping/core.ts#L350-L357"
     },
     {
       "kind": "interface",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index c4171edd29..ee15776942 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -6026,6 +6026,7 @@ export interface MappingSemanticTextProperty {
   inference_id?: Id
   search_inference_id?: Id
   chunking_settings?: MappingChunkingSettings
+  fields?: Record<PropertyName, MappingProperty>
 }
 
 export interface MappingShapeProperty extends MappingDocValuesPropertyBase {
diff --git a/specification/_types/mapping/core.ts b/specification/_types/mapping/core.ts
index 33377fce93..6ec2e97510 100644
--- a/specification/_types/mapping/core.ts
+++ b/specification/_types/mapping/core.ts
@@ -258,6 +258,12 @@ export class SemanticTextProperty {
    * they will not be applied to existing documents until they are reindexed.
    */
   chunking_settings?: ChunkingSettings
+  /**
+   * Multi-fields allow the same string value to be indexed in multiple ways for different purposes, such as one
+   * field for search and a multi-field for sorting and aggregations, or the same string value analyzed by different analyzers.
+   * @doc_id multi-fields
+   */
+  fields?: Dictionary<PropertyName, Property>
 }
 
 export class SearchAsYouTypeProperty extends CorePropertyBase {