diff --git a/src/Nest/XPack/MachineLearning/Job/Config/Job.cs b/src/Nest/XPack/MachineLearning/Job/Config/Job.cs
index 2886d1c03f5..42bca66fb0b 100644
--- a/src/Nest/XPack/MachineLearning/Job/Config/Job.cs
+++ b/src/Nest/XPack/MachineLearning/Job/Config/Job.cs
@@ -112,5 +112,16 @@ public class Job
 		/// </summary>
 		[DataMember(Name = "results_retention_days")]
 		public long? ResultsRetentionDays { get; set; }
+
+		/// <summary>
+		/// Advanced configuration option. Whether this job should be allowed to open when there is insufficient machine learning
+		/// node capacity for it to be immediately assigned to a node. The default is false, which means that the
+		/// machine learning open job will return an error if a machine learning node with capacity to run the job cannot immediately be found.
+		/// (However, this is also subject to the cluster-wide xpack.ml.max_lazy_ml_nodes setting.)
+		/// If this option is set to true then the machine learning open job will not return an error, and the job will wait in the opening
+		/// state until sufficient machine learning node capacity is available.
+		/// </summary>
+		[DataMember(Name ="allow_lazy_open")]
+		public bool? AllowLazyOpen { get; set; }
 	}
 }
diff --git a/src/Nest/XPack/MachineLearning/PutJob/PutJobRequest.cs b/src/Nest/XPack/MachineLearning/PutJob/PutJobRequest.cs
index e653332ce2b..774891d1680 100644
--- a/src/Nest/XPack/MachineLearning/PutJob/PutJobRequest.cs
+++ b/src/Nest/XPack/MachineLearning/PutJob/PutJobRequest.cs
@@ -55,6 +55,17 @@ public partial interface IPutJobRequest
 		/// </summary>
 		[DataMember(Name ="results_index_name")]
 		IndexName ResultsIndexName { get; set; }
+
+		/// <summary>
+		/// Advanced configuration option. Whether this job should be allowed to open when there is insufficient machine learning
+		/// node capacity for it to be immediately assigned to a node. The default is false, which means that the
+		/// machine learning open job will return an error if a machine learning node with capacity to run the job cannot immediately be found.
+		/// (However, this is also subject to the cluster-wide xpack.ml.max_lazy_ml_nodes setting.)
+		/// If this option is set to true then the machine learning open job will not return an error, and the job will wait in the opening
+		/// state until sufficient machine learning node capacity is available.
+		/// </summary>
+		[DataMember(Name ="allow_lazy_open")]
+		bool? AllowLazyOpen { get; set; }
 	}
 
 	/// <inheritdoc />
@@ -80,6 +91,9 @@ public partial class PutJobRequest
 
 		/// <inheritdoc />
 		public IndexName ResultsIndexName { get; set; }
+
+		/// <inheritdoc />
+		public bool? AllowLazyOpen { get; set; }
 	}
 
 	/// <inheritdoc />
@@ -92,6 +106,7 @@ public partial class PutJobDescriptor<TDocument> where TDocument : class
 		IModelPlotConfig IPutJobRequest.ModelPlotConfig { get; set; }
 		long? IPutJobRequest.ModelSnapshotRetentionDays { get; set; }
 		IndexName IPutJobRequest.ResultsIndexName { get; set; }
+		bool? IPutJobRequest.AllowLazyOpen { get; set; }
 
 		/// <inheritdoc />
 		public PutJobDescriptor<TDocument> AnalysisConfig(Func<AnalysisConfigDescriptor<TDocument>, IAnalysisConfig> selector) =>
@@ -123,6 +138,10 @@ public PutJobDescriptor<TDocument> ResultsIndexName(IndexName indexName) =>
 		/// <inheritdoc />
 		public PutJobDescriptor<TDocument> ResultsIndexName<TIndex>() =>
 			Assign(typeof(TIndex), (a, v) => a.ResultsIndexName = v);
+
+		/// <inheritdoc />
+		public PutJobDescriptor<TDocument> AllowLazyOpen(bool? allowLazyOpen = true) =>
+			Assign(allowLazyOpen, (a, v) => a.AllowLazyOpen = v);
 	}
 
 	[StringEnum]
diff --git a/src/Nest/XPack/MachineLearning/PutJob/PutJobResponse.cs b/src/Nest/XPack/MachineLearning/PutJob/PutJobResponse.cs
index 95c9f5d7ab1..d238d48c38a 100644
--- a/src/Nest/XPack/MachineLearning/PutJob/PutJobResponse.cs
+++ b/src/Nest/XPack/MachineLearning/PutJob/PutJobResponse.cs
@@ -105,6 +105,16 @@ public class PutJobResponse : ResponseBase
 		/// </summary>
 		[DataMember(Name ="results_retention_days")]
 		public long? ResultsRetentionDays { get; internal set; }
-	}
 
+		/// <summary>
+		/// Advanced configuration option. Whether this job should be allowed to open when there is insufficient machine learning
+		/// node capacity for it to be immediately assigned to a node. The default is false, which means that the
+		/// machine learning open job will return an error if a machine learning node with capacity to run the job cannot immediately be found.
+		/// (However, this is also subject to the cluster-wide xpack.ml.max_lazy_ml_nodes setting.)
+		/// If this option is set to true then the machine learning open job will not return an error, and the job will wait in the opening
+		/// state until sufficient machine learning node capacity is available.
+		/// </summary>
+		[DataMember(Name ="allow_lazy_open")]
+		public bool? AllowLazyOpen { get; set; }
+	}
 }
diff --git a/src/Nest/XPack/MachineLearning/UpdateJob/UpdateJobRequest.cs b/src/Nest/XPack/MachineLearning/UpdateJob/UpdateJobRequest.cs
index 1e551c9e51f..ce251da4310 100644
--- a/src/Nest/XPack/MachineLearning/UpdateJob/UpdateJobRequest.cs
+++ b/src/Nest/XPack/MachineLearning/UpdateJob/UpdateJobRequest.cs
@@ -66,19 +66,48 @@ public partial interface IUpdateJobRequest
 		/// </summary>
 		[DataMember(Name ="results_retention_days")]
 		long? ResultsRetentionDays { get; set; }
+
+		/// <summary>
+		/// Advanced configuration option. Whether this job should be allowed to open when there is insufficient machine learning
+		/// node capacity for it to be immediately assigned to a node. The default is false, which means that the
+		/// machine learning open job will return an error if a machine learning node with capacity to run the job cannot immediately be found.
+		/// (However, this is also subject to the cluster-wide xpack.ml.max_lazy_ml_nodes setting.)
+		/// If this option is set to true then the machine learning open job will not return an error, and the job will wait in the opening
+		/// state until sufficient machine learning node capacity is available.
+		/// </summary>
+		[DataMember(Name ="allow_lazy_open")]
+		bool? AllowLazyOpen { get; set; }
 	}
 
 	/// <inheritdoc />
 	public partial class UpdateJobRequest
 	{
+		/// <inheritdoc />
 		public IAnalysisMemoryLimit AnalysisLimits { get; set; }
+
+		/// <inheritdoc />
 		public Time BackgroundPersistInterval { get; set; }
+
+		/// <inheritdoc />
 		public Dictionary<string, object> CustomSettings { get; set; }
+
+		/// <inheritdoc />
 		public string Description { get; set; }
+
+		/// <inheritdoc />
 		public IModelPlotConfigEnabled ModelPlotConfig { get; set; }
+
+		/// <inheritdoc />
 		public long? ModelSnapshotRetentionDays { get; set; }
+
+		/// <inheritdoc />
 		public long? RenormalizationWindowDays { get; set; }
+
+		/// <inheritdoc />
 		public long? ResultsRetentionDays { get; set; }
+
+		/// <inheritdoc />
+		public bool? AllowLazyOpen { get; set; }
 	}
 
 	/// <inheritdoc />
@@ -93,6 +122,8 @@ public partial class UpdateJobDescriptor<TDocument> where TDocument : class
 		long? IUpdateJobRequest.RenormalizationWindowDays { get; set; }
 		long? IUpdateJobRequest.ResultsRetentionDays { get; set; }
 
+		bool? IUpdateJobRequest.AllowLazyOpen { get; set; }
+
 		/// <inheritdoc />
 		public UpdateJobDescriptor<TDocument> AnalysisLimits(Func<AnalysisMemoryLimitDescriptor, IAnalysisMemoryLimit> selector) =>
 			Assign(selector, (a, v) => a.AnalysisLimits = v?.Invoke(new AnalysisMemoryLimitDescriptor()));
@@ -123,5 +154,9 @@ public UpdateJobDescriptor<TDocument> RenormalizationWindowDays(long? renormaliz
 
 		/// <inheritdoc />
 		public UpdateJobDescriptor<TDocument> ResultsRetentionDays(long? resultsRetentionDays) => Assign(resultsRetentionDays, (a, v) => a.ResultsRetentionDays = v);
+
+		/// <inheritdoc />
+		public UpdateJobDescriptor<TDocument> AllowLazyOpen(bool? allowLazyOpen = true) =>
+			Assign(allowLazyOpen, (a, v) => a.AllowLazyOpen = v);
 	}
 }