diff --git a/codegen/generator/src/OpenAI.Library.Plugin.csproj b/codegen/generator/src/OpenAI.Library.Plugin.csproj
index d7c4a67a9..0787f02b9 100644
--- a/codegen/generator/src/OpenAI.Library.Plugin.csproj
+++ b/codegen/generator/src/OpenAI.Library.Plugin.csproj
@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="Microsoft.TypeSpec.Generator.ClientModel" Version="1.0.0-alpha.20250929.2" />
+      <PackageReference Include="Microsoft.TypeSpec.Generator.ClientModel" Version="1.0.0-alpha.20251001.2" />
     </ItemGroup>
 
   <!-- Copy output to package dist path for local execution and  -->
@@ -26,3 +26,4 @@
 
 
 
+
diff --git a/codegen/package.json b/codegen/package.json
index 9d2001319..bbeb2c0a4 100644
--- a/codegen/package.json
+++ b/codegen/package.json
@@ -30,7 +30,7 @@
   "dependencies": {
     "@open-ai/plugin": "file:",
     "@azure-tools/typespec-client-generator-core": "0.60.0",
-    "@typespec/http-client-csharp": "1.0.0-alpha.20250929.2",
+    "@typespec/http-client-csharp": "1.0.0-alpha.20251001.2",
     "@typespec/http": "1.4.0",
     "@typespec/openapi": "1.4.0"
   },
diff --git a/package-lock.json b/package-lock.json
index cd2fa1cb0..6038d79d4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "@azure-tools/typespec-client-generator-core": "0.60.0",
         "@open-ai/plugin": "file:",
         "@typespec/http": "1.4.0",
-        "@typespec/http-client-csharp": "1.0.0-alpha.20250929.2",
+        "@typespec/http-client-csharp": "1.0.0-alpha.20251001.2",
         "@typespec/openapi": "1.4.0"
       },
       "devDependencies": {
@@ -1481,9 +1481,9 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "22.18.7",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.18.7.tgz",
-      "integrity": "sha512-3E97nlWEVp2V6J7aMkR8eOnw/w0pArPwf/5/W0865f+xzBoGL/ZuHkTAKAGN7cOWNwd+sG+hZOqj+fjzeHS75g==",
+      "version": "22.18.8",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.18.8.tgz",
+      "integrity": "sha512-pAZSHMiagDR7cARo/cch1f3rXy0AEXwsVsVH09FcyeJVAzCnGgmYis7P3JidtTUjyadhTeSo8TgRPswstghDaw==",
       "devOptional": true,
       "license": "MIT",
       "dependencies": {
@@ -1555,9 +1555,9 @@
       }
     },
     "node_modules/@typespec/http-client-csharp": {
-      "version": "1.0.0-alpha.20250929.2",
-      "resolved": "https://registry.npmjs.org/@typespec/http-client-csharp/-/http-client-csharp-1.0.0-alpha.20250929.2.tgz",
-      "integrity": "sha512-kZgVEJd4CXYfdVDTjtp1SaFRElVyW8PNIUxDcxui8dzeR0JtMny3QuW82sGmWjQCdZClLeQdqzPWesRFM12tlw==",
+      "version": "1.0.0-alpha.20251001.2",
+      "resolved": "https://registry.npmjs.org/@typespec/http-client-csharp/-/http-client-csharp-1.0.0-alpha.20251001.2.tgz",
+      "integrity": "sha512-gyS/jJUpJbZbYnIJOKhxPn4N++mZnuvcKqJU601+dev30lTL1ekhBV8AcnXpkNUyeqpNj3a+RcYz7Cwo9y9JDg==",
       "license": "MIT",
       "peerDependencies": {
         "@azure-tools/typespec-client-generator-core": ">=0.60.0 < 0.61.0 || ~0.61.0-0",
@@ -4079,9 +4079,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.9.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
-      "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/src/Generated/Internal/MultiPartFormDataBinaryContent.cs b/src/Generated/Internal/MultiPartFormDataBinaryContent.cs
index 945fc05aa..e9ef267f5 100644
--- a/src/Generated/Internal/MultiPartFormDataBinaryContent.cs
+++ b/src/Generated/Internal/MultiPartFormDataBinaryContent.cs
@@ -181,7 +181,7 @@ public override void WriteTo(Stream stream, CancellationToken cancellationToken
         public override async Task WriteToAsync(Stream stream, CancellationToken cancellationToken = default)
         {
 #if NET6_0_OR_GREATER
-            await _multipartContent.CopyToAsync(stream).ConfigureAwait(false);
+            await _multipartContent.CopyToAsync(stream, cancellationToken).ConfigureAwait(false);
 #else
             await _multipartContent.CopyToAsync(stream).ConfigureAwait(false);
 #endif