diff --git a/firebaseai/ChatExample/ViewModels/ConversationViewModel.swift b/firebaseai/ChatExample/ViewModels/ConversationViewModel.swift
index 29cc06db4..7487efd7e 100644
--- a/firebaseai/ChatExample/ViewModels/ConversationViewModel.swift
+++ b/firebaseai/ChatExample/ViewModels/ConversationViewModel.swift
@@ -36,7 +36,7 @@ class ConversationViewModel: ObservableObject {
   private var chatTask: Task<Void, Never>?
 
   init(firebaseService: FirebaseAI) {
-    model = firebaseService.generativeModel(modelName: "gemini-2.0-flash-001")
+    model = firebaseService.generativeModel(modelName: ModelNames.geminiFlash)
     chat = model.startChat()
   }
 
diff --git a/firebaseai/Constants/ModelNames.swift b/firebaseai/Constants/ModelNames.swift
new file mode 100644
index 000000000..a2841ee4b
--- /dev/null
+++ b/firebaseai/Constants/ModelNames.swift
@@ -0,0 +1,18 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+enum ModelNames {
+    static let geminiFlash = "gemini-2.5-flash"
+    static let imagenGenerate = "imagen-3.0-generate-002"
+}
\ No newline at end of file
diff --git a/firebaseai/FirebaseAIExample.xcodeproj/project.pbxproj b/firebaseai/FirebaseAIExample.xcodeproj/project.pbxproj
index e7ef45bc0..110544703 100644
--- a/firebaseai/FirebaseAIExample.xcodeproj/project.pbxproj
+++ b/firebaseai/FirebaseAIExample.xcodeproj/project.pbxproj
@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 56;
+	objectVersion = 70;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -63,6 +63,10 @@
 		DEFECAA72D7B4CCD00EF9621 /* ImagenViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ImagenViewModel.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
+/* Begin PBXFileSystemSynchronizedRootGroup section */
+		119154B72E12FA4B006C75E6 /* Constants */ = {isa = PBXFileSystemSynchronizedRootGroup; explicitFileTypes = {}; explicitFolders = (); path = Constants; sourceTree = "<group>"; };
+/* End PBXFileSystemSynchronizedRootGroup section */
+
 /* Begin PBXFrameworksBuildPhase section */
 		8848C82C2B0D04BC007B434F /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
@@ -144,6 +148,7 @@
 		8848C8262B0D04BC007B434F = {
 			isa = PBXGroup;
 			children = (
+				119154B72E12FA4B006C75E6 /* Constants */,
 				DEFECAA82D7B4CCD00EF9621 /* ImagenScreen */,
 				88B8A9352B0FCBA700424728 /* GenerativeAIUIComponents */,
 				869200B22B879C4F00482873 /* GoogleService-Info.plist */,
@@ -302,6 +307,9 @@
 			);
 			dependencies = (
 			);
+			fileSystemSynchronizedGroups = (
+				119154B72E12FA4B006C75E6 /* Constants */,
+			);
 			name = FirebaseAIExample;
 			packageProductDependencies = (
 				886F95D72B17BA420036F07A /* MarkdownUI */,
diff --git a/firebaseai/FunctionCallingExample/ViewModels/FunctionCallingViewModel.swift b/firebaseai/FunctionCallingExample/ViewModels/FunctionCallingViewModel.swift
index 8bd7f90ef..ce3093412 100644
--- a/firebaseai/FunctionCallingExample/ViewModels/FunctionCallingViewModel.swift
+++ b/firebaseai/FunctionCallingExample/ViewModels/FunctionCallingViewModel.swift
@@ -39,7 +39,7 @@ class FunctionCallingViewModel: ObservableObject {
 
   init(firebaseService: FirebaseAI) { // Accept FirebaseAI instance
       model = firebaseService.generativeModel(
-          modelName: "gemini-2.0-flash-001",
+          modelName: ModelNames.geminiFlash,
           tools: [.functionDeclarations([
               FunctionDeclaration(
           name: "get_exchange_rate",
diff --git a/firebaseai/GenerativeAIMultimodalExample/ViewModels/PhotoReasoningViewModel.swift b/firebaseai/GenerativeAIMultimodalExample/ViewModels/PhotoReasoningViewModel.swift
index 24a2e96e2..d5b96e7e4 100644
--- a/firebaseai/GenerativeAIMultimodalExample/ViewModels/PhotoReasoningViewModel.swift
+++ b/firebaseai/GenerativeAIMultimodalExample/ViewModels/PhotoReasoningViewModel.swift
@@ -44,7 +44,7 @@ class PhotoReasoningViewModel: ObservableObject {
   private var model: GenerativeModel?
 
   init(firebaseService: FirebaseAI) {
-    model = firebaseService.generativeModel(modelName: "gemini-2.0-flash-001")
+    model = firebaseService.generativeModel(modelName: ModelNames.geminiFlash)
   }
 
   func reason() async {
diff --git a/firebaseai/GenerativeAITextExample/ViewModels/GenerateContentViewModel.swift b/firebaseai/GenerativeAITextExample/ViewModels/GenerateContentViewModel.swift
index a9272ef5b..2f5f3f069 100644
--- a/firebaseai/GenerativeAITextExample/ViewModels/GenerateContentViewModel.swift
+++ b/firebaseai/GenerativeAITextExample/ViewModels/GenerateContentViewModel.swift
@@ -32,7 +32,7 @@ class GenerateContentViewModel: ObservableObject {
   private var model: GenerativeModel?
 
   init(firebaseService: FirebaseAI) {
-    model = firebaseService.generativeModel(modelName: "gemini-2.0-flash-001")
+    model = firebaseService.generativeModel(modelName: ModelNames.geminiFlash)
   }
 
   func generateContent(inputText: String) async {
diff --git a/firebaseai/ImagenScreen/ImagenViewModel.swift b/firebaseai/ImagenScreen/ImagenViewModel.swift
index d4fc2b43f..38e737431 100644
--- a/firebaseai/ImagenScreen/ImagenViewModel.swift
+++ b/firebaseai/ImagenScreen/ImagenViewModel.swift
@@ -38,7 +38,7 @@ class ImagenViewModel: ObservableObject {
   private var generateImagesTask: Task<Void, Never>?
 
   init(firebaseService: FirebaseAI) {
-    let modelName = "imagen-3.0-generate-002"
+    let modelName = ModelNames.imagenGenerate
     let safetySettings = ImagenSafetySettings(
       safetyFilterLevel: .blockLowAndAbove
     )