diff --git a/output/schema/schema.json b/output/schema/schema.json
index 1e19f5ddd3..fbc6096674 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -149419,9 +149419,9 @@
             }
           },
           {
-            "description": "The default configuration for inference. This can be either a regression\nor classification configuration. It must match the underlying\ndefinition.trained_model's target_type.",
+            "description": "The default configuration for inference. This can be either a regression\nor classification configuration. It must match the underlying\ndefinition.trained_model's target_type. For pre-packaged models such as\nELSER the config is not required.",
             "name": "inference_config",
-            "required": true,
+            "required": false,
             "type": {
               "kind": "instance_of",
               "type": {
@@ -149539,7 +149539,7 @@
           }
         }
       ],
-      "specLocation": "ml/put_trained_model/MlPutTrainedModelRequest.ts#L28-L95"
+      "specLocation": "ml/put_trained_model/MlPutTrainedModelRequest.ts#L28-L96"
     },
     {
       "body": {
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 8420415c8e..739eafd1d8 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -14135,7 +14135,7 @@ export interface MlPutTrainedModelRequest extends RequestBase {
     compressed_definition?: string
     definition?: MlPutTrainedModelDefinition
     description?: string
-    inference_config: MlInferenceConfigCreateContainer
+    inference_config?: MlInferenceConfigCreateContainer
     input?: MlPutTrainedModelInput
     metadata?: any
     model_type?: MlTrainedModelType
diff --git a/specification/ml/put_trained_model/MlPutTrainedModelRequest.ts b/specification/ml/put_trained_model/MlPutTrainedModelRequest.ts
index db8eb4bd26..8374b81ccd 100644
--- a/specification/ml/put_trained_model/MlPutTrainedModelRequest.ts
+++ b/specification/ml/put_trained_model/MlPutTrainedModelRequest.ts
@@ -65,9 +65,10 @@ export interface Request extends RequestBase {
     /**
      * The default configuration for inference. This can be either a regression
      * or classification configuration. It must match the underlying
-     * definition.trained_model's target_type.
+     * definition.trained_model's target_type. For pre-packaged models such as
+     * ELSER the config is not required.
      */
-    inference_config: InferenceConfigCreateContainer
+    inference_config?: InferenceConfigCreateContainer
     /**
      * The input field names for the model definition.
      */