diff --git a/eng/Packages.Data.props b/eng/Packages.Data.props
index 9b6b35f5afac..fb01d2819cdf 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.20230824.1" PrivateAssets="All" />
+    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-alpha.20230824.5" 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 ab43d2d8f420..29a7cd892e83 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.20230824.1"
+      "@azure-tools/typespec-csharp": "0.2.0-alpha.20230824.5"
     }
 }
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureOpenAIModelFactory.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureOpenAIModelFactory.cs
index f10cb319f22e..bcfd74d73699 100644
--- a/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureOpenAIModelFactory.cs
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/AzureOpenAIModelFactory.cs
@@ -8,7 +8,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using Azure;
 
 namespace Azure.AI.OpenAI
 {
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/Error.Serialization.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/Error.Serialization.cs
new file mode 100644
index 000000000000..24fa8217d51e
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/Error.Serialization.cs
@@ -0,0 +1,80 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+using System.Collections.Generic;
+using System.Text.Json;
+using Azure;
+using Azure.Core;
+
+namespace Azure.AI.OpenAI
+{
+    internal partial class Error
+    {
+        internal static Error DeserializeError(JsonElement element)
+        {
+            if (element.ValueKind == JsonValueKind.Null)
+            {
+                return null;
+            }
+            string code = default;
+            string message = default;
+            Optional<string> target = default;
+            Optional<IReadOnlyList<ResponseError>> details = default;
+            Optional<InnerError> innererror = default;
+            foreach (var property in element.EnumerateObject())
+            {
+                if (property.NameEquals("code"u8))
+                {
+                    code = property.Value.GetString();
+                    continue;
+                }
+                if (property.NameEquals("message"u8))
+                {
+                    message = property.Value.GetString();
+                    continue;
+                }
+                if (property.NameEquals("target"u8))
+                {
+                    target = property.Value.GetString();
+                    continue;
+                }
+                if (property.NameEquals("details"u8))
+                {
+                    if (property.Value.ValueKind == JsonValueKind.Null)
+                    {
+                        continue;
+                    }
+                    List<ResponseError> array = new List<ResponseError>();
+                    foreach (var item in property.Value.EnumerateArray())
+                    {
+                        array.Add(JsonSerializer.Deserialize<ResponseError>(item.GetRawText()));
+                    }
+                    details = array;
+                    continue;
+                }
+                if (property.NameEquals("innererror"u8))
+                {
+                    if (property.Value.ValueKind == JsonValueKind.Null)
+                    {
+                        continue;
+                    }
+                    innererror = InnerError.DeserializeInnerError(property.Value);
+                    continue;
+                }
+            }
+            return new Error(code, message, target.Value, Optional.ToList(details), innererror.Value);
+        }
+
+        /// <summary> Deserializes the model from a raw response. </summary>
+        /// <param name="response"> The response to deserialize the model from. </param>
+        internal static Error FromResponse(Response response)
+        {
+            using var document = JsonDocument.Parse(response.Content);
+            return DeserializeError(document.RootElement);
+        }
+    }
+}
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/Error.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/Error.cs
new file mode 100644
index 000000000000..628deaa5620e
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/Error.cs
@@ -0,0 +1,58 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+using System;
+using System.Collections.Generic;
+using Azure;
+using Azure.Core;
+
+namespace Azure.AI.OpenAI
+{
+    /// <summary> The error object. </summary>
+    internal partial class Error
+    {
+        /// <summary> Initializes a new instance of Error. </summary>
+        /// <param name="code"> One of a server-defined set of error codes. </param>
+        /// <param name="message"> A human-readable representation of the error. </param>
+        /// <exception cref="ArgumentNullException"> <paramref name="code"/> or <paramref name="message"/> is null. </exception>
+        internal Error(string code, string message)
+        {
+            Argument.AssertNotNull(code, nameof(code));
+            Argument.AssertNotNull(message, nameof(message));
+
+            Code = code;
+            Message = message;
+            Details = new ChangeTrackingList<ResponseError>();
+        }
+
+        /// <summary> Initializes a new instance of Error. </summary>
+        /// <param name="code"> One of a server-defined set of error codes. </param>
+        /// <param name="message"> A human-readable representation of the error. </param>
+        /// <param name="target"> The target of the error. </param>
+        /// <param name="details"> An array of details about specific errors that led to this reported error. </param>
+        /// <param name="innererror"> An object containing more specific information than the current object about the error. </param>
+        internal Error(string code, string message, string target, IReadOnlyList<ResponseError> details, InnerError innererror)
+        {
+            Code = code;
+            Message = message;
+            Target = target;
+            Details = details;
+            Innererror = innererror;
+        }
+
+        /// <summary> One of a server-defined set of error codes. </summary>
+        public string Code { get; }
+        /// <summary> A human-readable representation of the error. </summary>
+        public string Message { get; }
+        /// <summary> The target of the error. </summary>
+        public string Target { get; }
+        /// <summary> An array of details about specific errors that led to this reported error. </summary>
+        public IReadOnlyList<ResponseError> Details { get; }
+        /// <summary> An object containing more specific information than the current object about the error. </summary>
+        public InnerError Innererror { get; }
+    }
+}
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/InnerError.Serialization.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/InnerError.Serialization.cs
new file mode 100644
index 000000000000..ae30ef9d4133
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/InnerError.Serialization.cs
@@ -0,0 +1,52 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+using System.Text.Json;
+using Azure;
+using Azure.Core;
+
+namespace Azure.AI.OpenAI
+{
+    internal partial class InnerError
+    {
+        internal static InnerError DeserializeInnerError(JsonElement element)
+        {
+            if (element.ValueKind == JsonValueKind.Null)
+            {
+                return null;
+            }
+            Optional<string> code = default;
+            Optional<InnerError> innererror = default;
+            foreach (var property in element.EnumerateObject())
+            {
+                if (property.NameEquals("code"u8))
+                {
+                    code = property.Value.GetString();
+                    continue;
+                }
+                if (property.NameEquals("innererror"u8))
+                {
+                    if (property.Value.ValueKind == JsonValueKind.Null)
+                    {
+                        continue;
+                    }
+                    innererror = DeserializeInnerError(property.Value);
+                    continue;
+                }
+            }
+            return new InnerError(code.Value, innererror.Value);
+        }
+
+        /// <summary> Deserializes the model from a raw response. </summary>
+        /// <param name="response"> The response to deserialize the model from. </param>
+        internal static InnerError FromResponse(Response response)
+        {
+            using var document = JsonDocument.Parse(response.Content);
+            return DeserializeInnerError(document.RootElement);
+        }
+    }
+}
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/InnerError.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/InnerError.cs
new file mode 100644
index 000000000000..a31235eb6783
--- /dev/null
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/InnerError.cs
@@ -0,0 +1,32 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// <auto-generated/>
+
+#nullable disable
+
+namespace Azure.AI.OpenAI
+{
+    /// <summary> An object containing more specific information about the error. As per Microsoft One API guidelines - https://github.com/Microsoft/api-guidelines/blob/vNext/Guidelines.md#7102-error-condition-responses. </summary>
+    internal partial class InnerError
+    {
+        /// <summary> Initializes a new instance of InnerError. </summary>
+        internal InnerError()
+        {
+        }
+
+        /// <summary> Initializes a new instance of InnerError. </summary>
+        /// <param name="code"> One of a server-defined set of error codes. </param>
+        /// <param name="innerErrorObject"> Inner error. </param>
+        internal InnerError(string code, InnerError innerErrorObject)
+        {
+            Code = code;
+            InnerErrorObject = innerErrorObject;
+        }
+
+        /// <summary> One of a server-defined set of error codes. </summary>
+        public string Code { get; }
+        /// <summary> Inner error. </summary>
+        public InnerError InnerErrorObject { get; }
+    }
+}