diff --git a/eng/Packages.Data.props b/eng/Packages.Data.props
index 0c05bcc8f0eb..f3bba5adcdee 100644
--- a/eng/Packages.Data.props
+++ b/eng/Packages.Data.props
@@ -174,7 +174,7 @@
     All should have PrivateAssets="All" set so they don't become package dependencies
   -->
   <ItemGroup>
-    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-beta.20230920.3" PrivateAssets="All" />
+    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-alpha.20230921.10" PrivateAssets="All" />
     <PackageReference Update="Azure.ClientSdk.Analyzers" Version="0.1.1-dev.20230822.1" PrivateAssets="All" />
     <PackageReference Update="coverlet.collector" Version="3.2.0" PrivateAssets="All" />
     <PackageReference Update="Microsoft.CodeAnalysis.NetAnalyzers" Version="7.0.1" PrivateAssets="All" />
diff --git a/eng/emitter-package.json b/eng/emitter-package.json
index 8a24cf60b0fa..d6efb951d3f9 100644
--- a/eng/emitter-package.json
+++ b/eng/emitter-package.json
@@ -1,6 +1,6 @@
 {
     "main": "dist/src/index.js",
     "dependencies": {
-      "@azure-tools/typespec-csharp": "0.2.0-beta.20230920.3"
+      "@azure-tools/typespec-csharp": "0.2.0-alpha.20230921.10"
     }
 }
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchChatExtensionConfiguration.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchChatExtensionConfiguration.cs
new file mode 100644
index 000000000000..37a78605a28a
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchChatExtensionConfiguration.cs
@@ -0,0 +1,21 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+using System;
+using Azure;
+using Azure.Core;
+
+namespace Azure.AI.OpenAI
+{
+    /// <summary>
+    /// A specific representation of configurable options for Azure Cognitive Search when using it as an Azure OpenAI chat
+    /// extension.
+    /// </summary>
+    public partial class AzureCognitiveSearchChatExtensionConfiguration
+    {
+    }
+}
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchIndexFieldMappingOptions.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchIndexFieldMappingOptions.cs
new file mode 100644
index 000000000000..118fca80f2c4
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchIndexFieldMappingOptions.cs
@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+using System.Collections.Generic;
+using Azure.Core;
+
+namespace Azure.AI.OpenAI
+{
+    /// <summary> Optional settings to control how fields are processed when using a configured Azure Cognitive Search resource. </summary>
+    public partial class AzureCognitiveSearchIndexFieldMappingOptions
+    {
+    }
+}
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchQueryType.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchQueryType.cs
new file mode 100644
index 000000000000..cc8e6e9075b1
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureCognitiveSearchQueryType.cs
@@ -0,0 +1,23 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+using System;
+using System.ComponentModel;
+
+namespace Azure.AI.OpenAI
+{
+    /// <summary> The type of Azure Cognitive Search retrieval query that should be executed when using it as an Azure OpenAI chat extension. </summary>
+    public readonly partial struct AzureCognitiveSearchQueryType : IEquatable<AzureCognitiveSearchQueryType>
+    {
+        /// <summary> Determines if two <see cref="AzureCognitiveSearchQueryType"/> values are the same. </summary>
+        public static bool operator ==(AzureCognitiveSearchQueryType left, AzureCognitiveSearchQueryType right) => left.Equals(right);
+        /// <summary> Determines if two <see cref="AzureCognitiveSearchQueryType"/> values are not the same. </summary>
+        public static bool operator !=(AzureCognitiveSearchQueryType left, AzureCognitiveSearchQueryType right) => !left.Equals(right);
+        /// <summary> Converts a string to a <see cref="AzureCognitiveSearchQueryType"/>. </summary>
+        public static implicit operator AzureCognitiveSearchQueryType(string value) => new AzureCognitiveSearchQueryType(value);
+    }
+}