diff --git a/packages/firebase_ai/firebase_ai/example/lib/main.dart b/packages/firebase_ai/firebase_ai/example/lib/main.dart
index 133f2c6ec257..69f37490f6ba 100644
--- a/packages/firebase_ai/firebase_ai/example/lib/main.dart
+++ b/packages/firebase_ai/firebase_ai/example/lib/main.dart
@@ -26,7 +26,6 @@ import 'pages/chat_page.dart';
 import 'pages/document.dart';
 import 'pages/function_calling_page.dart';
 import 'pages/image_prompt_page.dart';
-import 'pages/imagen_page.dart';
 import 'pages/json_schema_page.dart';
 import 'pages/schema_page.dart';
 import 'pages/token_count_page.dart';
@@ -53,7 +52,6 @@ class GenerativeAISample extends StatefulWidget {
 class _GenerativeAISampleState extends State<GenerativeAISample> {
   bool _useVertexBackend = false;
   late GenerativeModel _currentModel;
-  late ImagenModel _currentImagenModel;
 
   static final ThemeData _darkTheme = ThemeData(
     colorScheme: ColorScheme.fromSeed(
@@ -74,30 +72,12 @@ class _GenerativeAISampleState extends State<GenerativeAISample> {
     if (useVertexBackend) {
       final vertexInstance = FirebaseAI.vertexAI(auth: FirebaseAuth.instance);
       _currentModel = vertexInstance.generativeModel(model: 'gemini-2.5-flash');
-      _currentImagenModel = _initializeImagenModel(vertexInstance);
     } else {
       final googleAI = FirebaseAI.googleAI(auth: FirebaseAuth.instance);
       _currentModel = googleAI.generativeModel(model: 'gemini-2.5-flash');
-      _currentImagenModel = _initializeImagenModel(googleAI);
     }
   }
 
-  ImagenModel _initializeImagenModel(FirebaseAI instance) {
-    var generationConfig = ImagenGenerationConfig(
-      numberOfImages: 1,
-      aspectRatio: ImagenAspectRatio.square1x1,
-      imageFormat: ImagenFormat.jpeg(compressionQuality: 75),
-    );
-    return instance.imagenModel(
-      model: 'imagen-3.0-capability-001',
-      generationConfig: generationConfig,
-      safetySettings: ImagenSafetySettings(
-        ImagenSafetyFilterLevel.blockLowAndAbove,
-        ImagenPersonFilterLevel.allowAdult,
-      ),
-    );
-  }
-
   void _toggleBackend(bool value) {
     setState(() {
       _useVertexBackend = value;
@@ -117,7 +97,6 @@ class _GenerativeAISampleState extends State<GenerativeAISample> {
           '${_useVertexBackend}_${_currentModel.hashCode}',
         ),
         model: _currentModel,
-        imagenModel: _currentImagenModel,
         useVertexBackend: _useVertexBackend,
         onBackendChanged: _toggleBackend,
       ),
@@ -127,14 +106,12 @@ class _GenerativeAISampleState extends State<GenerativeAISample> {
 
 class HomeScreen extends StatefulWidget {
   final GenerativeModel model;
-  final ImagenModel imagenModel;
   final bool useVertexBackend;
   final ValueChanged<bool> onBackendChanged;
 
   const HomeScreen({
     super.key,
     required this.model,
-    required this.imagenModel,
     required this.useVertexBackend,
     required this.onBackendChanged,
   });
@@ -156,7 +133,6 @@ class _HomeScreenState extends State<HomeScreen> {
   Widget _buildSelectedPage(
     int index,
     GenerativeModel currentModel,
-    ImagenModel currentImagenModel,
     bool useVertexBackend,
   ) {
     switch (index) {
@@ -178,22 +154,20 @@ class _HomeScreenState extends State<HomeScreen> {
       case 4:
         return ImagePromptPage(title: 'Image Prompt', model: currentModel);
       case 5:
-        return ImagenPage(title: 'Imagen Model', model: currentImagenModel);
-      case 6:
         return SchemaPromptPage(title: 'Schema Prompt', model: currentModel);
-      case 7:
+      case 6:
         return JsonSchemaPage(title: 'JSON Schema', model: currentModel);
-      case 8:
+      case 7:
         return DocumentPage(title: 'Document Prompt', model: currentModel);
-      case 9:
+      case 8:
         return VideoPage(title: 'Video Prompt', model: currentModel);
-      case 10:
+      case 9:
         return BidiPage(
           title: 'Live Stream',
           model: currentModel,
           useVertexBackend: useVertexBackend,
         );
-      case 11:
+      case 10:
         return ServerTemplatePage(
           title: 'Server Template',
           useVertexBackend: useVertexBackend,
@@ -259,7 +233,6 @@ class _HomeScreenState extends State<HomeScreen> {
         child: _buildSelectedPage(
           _selectedIndex,
           widget.model,
-          widget.imagenModel,
           widget.useVertexBackend,
         ),
       ),
@@ -297,11 +270,6 @@ class _HomeScreenState extends State<HomeScreen> {
             label: 'Image',
             tooltip: 'Image Prompt',
           ),
-          BottomNavigationBarItem(
-            icon: Icon(Icons.image_search),
-            label: 'Imagen',
-            tooltip: 'Imagen Model',
-          ),
           BottomNavigationBarItem(
             icon: Icon(Icons.schema),
             label: 'Schema',
diff --git a/packages/firebase_ai/firebase_ai/example/lib/pages/imagen_page.dart b/packages/firebase_ai/firebase_ai/example/lib/pages/imagen_page.dart
deleted file mode 100644
index 390279c1ffd2..000000000000
--- a/packages/firebase_ai/firebase_ai/example/lib/pages/imagen_page.dart
+++ /dev/null
@@ -1,544 +0,0 @@
-// 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.
-
-import 'dart:typed_data';
-
-import 'package:image_picker/image_picker.dart';
-import 'package:firebase_ai/firebase_ai.dart';
-
-import 'package:flutter/material.dart';
-//import 'package:firebase_storage/firebase_storage.dart';
-import '../widgets/message_widget.dart';
-import '../utils/image_utils.dart';
-
-class ImagenPage extends StatefulWidget {
-  const ImagenPage({
-    super.key,
-    required this.title,
-    required this.model,
-  });
-
-  final String title;
-  final ImagenModel model;
-
-  @override
-  State<ImagenPage> createState() => _ImagenPageState();
-}
-
-class _ImagenPageState extends State<ImagenPage> {
-  final ScrollController _scrollController = ScrollController();
-  final TextEditingController _textController = TextEditingController();
-  final FocusNode _textFieldFocus = FocusNode();
-  final List<MessageData> _generatedContent = <MessageData>[];
-  bool _loading = false;
-
-  // For image picking
-  ImagenInlineImage? _sourceImage;
-  ImagenInlineImage? _maskImageForEditing;
-
-  void _scrollDown() {
-    WidgetsBinding.instance.addPostFrameCallback(
-      (_) => _scrollController.animateTo(
-        _scrollController.position.maxScrollExtent,
-        duration: const Duration(
-          milliseconds: 750,
-        ),
-        curve: Curves.easeOutCirc,
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: Text(widget.title),
-      ),
-      body: Padding(
-        padding: const EdgeInsets.all(8),
-        child: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Expanded(
-              child: ListView.builder(
-                controller: _scrollController,
-                itemBuilder: (context, idx) {
-                  return MessageWidget(
-                    text: _generatedContent[idx].text,
-                    image: Image.memory(
-                      _generatedContent[idx].imageBytes!,
-                      cacheWidth: 400,
-                      cacheHeight: 400,
-                    ),
-                    isFromUser: _generatedContent[idx].fromUser ?? false,
-                  );
-                },
-                itemCount: _generatedContent.length,
-              ),
-            ),
-            Padding(
-              padding: const EdgeInsets.symmetric(
-                vertical: 25,
-                horizontal: 15,
-              ),
-              child: Column(
-                children: [
-                  // Generate Image Row
-                  Row(
-                    children: [
-                      Expanded(
-                        child: TextField(
-                          autofocus: true,
-                          focusNode: _textFieldFocus,
-                          decoration: const InputDecoration(
-                            hintText: 'Enter a prompt...',
-                          ),
-                          controller: _textController,
-                        ),
-                      ),
-                      const SizedBox.square(dimension: 15),
-                      IconButton(
-                        onPressed: () async {
-                          await _pickSourceImage();
-                        },
-                        icon: Icon(
-                          Icons.add_a_photo,
-                          color: Theme.of(context).colorScheme.primary,
-                        ),
-                        tooltip: 'Pick Source Image',
-                      ),
-                      IconButton(
-                        onPressed: () async {
-                          await _pickMaskImage();
-                        },
-                        icon: Icon(
-                          Icons.add_to_photos,
-                          color: Theme.of(context).colorScheme.primary,
-                        ),
-                        tooltip: 'Pick mask',
-                      ),
-                      IconButton(
-                        onPressed: () async {
-                          await _editWithMask();
-                        },
-                        icon: Icon(
-                          Icons.brush,
-                          color: Theme.of(context).colorScheme.primary,
-                        ),
-                        tooltip: 'Edit with Mask',
-                      ),
-                      IconButton(
-                        onPressed: () async {
-                          await _editWithStyle();
-                        },
-                        icon: Icon(
-                          Icons.edit,
-                          color: Theme.of(context).colorScheme.primary,
-                        ),
-                        tooltip: 'Edit with Style',
-                      ),
-                      IconButton(
-                        onPressed: () async {
-                          await _outpaintImage();
-                        },
-                        icon: Icon(
-                          Icons.masks,
-                          color: Theme.of(context).colorScheme.primary,
-                        ),
-                        tooltip: 'Outpaint',
-                      ),
-                      IconButton(
-                        onPressed: () async {
-                          await _inpaintImageHappyPath();
-                        },
-                        icon: Icon(
-                          Icons.plus_one,
-                          color: Theme.of(context).colorScheme.primary,
-                        ),
-                        tooltip: 'Inpaint',
-                      ),
-                      if (!_loading)
-                        IconButton(
-                          onPressed: () async {
-                            await _generateImageFromPrompt(
-                              _textController.text,
-                            );
-                          },
-                          icon: Icon(
-                            Icons.image_search,
-                            color: Theme.of(context).colorScheme.primary,
-                          ),
-                          tooltip: 'Generate Image',
-                        )
-                      else
-                        const CircularProgressIndicator(),
-                    ],
-                  ),
-                ],
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Future<ImagenInlineImage?> _pickImage() async {
-    final ImagePicker picker = ImagePicker();
-    try {
-      final XFile? imageFile =
-          await picker.pickImage(source: ImageSource.gallery);
-      if (imageFile != null) {
-        // Attempt to get mimeType, default if null.
-        // Note: imageFile.mimeType might be null on some platforms or for some files.
-        final String mimeType = imageFile.mimeType ?? 'image/jpeg';
-        final Uint8List imageBytes = await imageFile.readAsBytes();
-        return ImagenInlineImage(
-          bytesBase64Encoded: imageBytes,
-          mimeType: mimeType,
-        );
-      }
-    } catch (e) {
-      _showError('Error picking image: $e');
-    }
-    return null;
-  }
-
-  Future<void> _pickSourceImage() async {
-    final pickedImage = await _pickImage();
-    if (pickedImage != null) {
-      setState(() {
-        _sourceImage = pickedImage;
-      });
-    }
-  }
-
-  Future<void> _pickMaskImage() async {
-    final pickedImage = await _pickImage();
-    if (pickedImage != null) {
-      setState(() {
-        _maskImageForEditing = pickedImage;
-      });
-    }
-  }
-
-  Future<void> _inpaintImageHappyPath() async {
-    if (_sourceImage == null) {
-      _showError('Please pick a source image for inpaint insertion.');
-      return;
-    }
-    setState(() {
-      _loading = true;
-    });
-
-    final String prompt = _textController.text;
-    final promptMessage = MessageData(
-      imageBytes: _sourceImage!.bytesBase64Encoded,
-      text: 'Try to inpaint image with prompt: $prompt',
-      fromUser: true,
-    );
-
-    MessageData? resultMessage;
-
-    try {
-      // ignore: experimental_member_use
-      final response = await widget.model.inpaintImage(
-        _sourceImage!,
-        prompt,
-        // ignore: experimental_member_use
-        ImagenBackgroundMask(),
-        // ignore: experimental_member_use
-        config: ImagenEditingConfig(editMode: ImagenEditMode.inpaintInsertion),
-      );
-      if (response.images.isNotEmpty) {
-        final inpaintImage = response.images[0];
-        resultMessage = MessageData(
-          imageBytes: inpaintImage.bytesBase64Encoded,
-          text: 'Inpaint image result with prompt: $prompt',
-          fromUser: false,
-        );
-      } else {
-        _showError('No image was returned from inpaint.');
-      }
-    } catch (e) {
-      _showError('Error inpaint image: $e');
-    }
-
-    setState(() {
-      _generatedContent.add(promptMessage);
-      if (resultMessage != null) {
-        _generatedContent.add(resultMessage);
-      }
-      _loading = false;
-      _scrollDown();
-    });
-  }
-
-  Future<void> _editWithMask() async {
-    if (_sourceImage == null) {
-      _showError('Please pick a source image for editing.');
-      return;
-    }
-    if (_maskImageForEditing == null) {
-      _showError('Please pick a mask image for editing.');
-      return;
-    }
-
-    setState(() {
-      _loading = true;
-    });
-
-    final String prompt = _textController.text;
-    // Create a message to show what we are doing
-    final promptMessage = MessageData(
-      imageBytes: _sourceImage!.bytesBase64Encoded,
-      text: 'Editing image with mask and prompt: $prompt',
-      fromUser: true,
-    );
-
-    MessageData? resultMessage;
-
-    try {
-      // ignore: experimental_member_use
-      final response = await widget.model.editImage(
-        [
-          // ignore: experimental_member_use
-          ImagenRawImage(image: _sourceImage!),
-          // ignore: experimental_member_use
-          ImagenRawMask(mask: _maskImageForEditing!),
-        ],
-        prompt,
-      );
-
-      if (response.images.isNotEmpty) {
-        final editedImage = response.images[0];
-        resultMessage = MessageData(
-          imageBytes: editedImage.bytesBase64Encoded,
-          text: 'Edited image result with prompt: $prompt',
-          fromUser: false,
-        );
-      } else {
-        _showError('No image was returned from editing with mask.');
-      }
-    } catch (e) {
-      _showError('Error editing image with mask: $e');
-    }
-
-    setState(() {
-      _generatedContent.add(promptMessage);
-      if (resultMessage != null) {
-        _generatedContent.add(resultMessage);
-      }
-      _loading = false;
-      _scrollDown();
-    });
-  }
-
-  Future<void> _outpaintImage() async {
-    if (_sourceImage == null) {
-      _showError('Please pick a source image for outpainting.');
-      return;
-    }
-    setState(() {
-      _loading = true;
-    });
-
-    final promptMessage = MessageData(
-      imageBytes: _sourceImage!.bytesBase64Encoded,
-      text: 'Outpaint the picture to 1400*1400',
-      fromUser: true,
-    );
-
-    MessageData? resultMessage;
-    try {
-      final referenceImages = await generateMaskAndPadForOutpainting(
-        image: _sourceImage!,
-        // ignore: experimental_member_use
-        newDimensions: ImagenDimensions(width: 1400, height: 1400),
-      );
-      // ignore: experimental_member_use
-      final response = await widget.model.editImage(
-        referenceImages,
-        '',
-        // ignore: experimental_member_use
-        config: ImagenEditingConfig(editMode: ImagenEditMode.outpaint),
-      );
-      if (response.images.isNotEmpty) {
-        final editedImage = response.images[0];
-        resultMessage = MessageData(
-          imageBytes: editedImage.bytesBase64Encoded,
-          text: 'Edited image Outpaint 1400*1400',
-          fromUser: false,
-        );
-      } else {
-        _showError('No image was returned from editing.');
-      }
-    } catch (e) {
-      _showError('Error editing image: $e');
-    }
-
-    setState(() {
-      _generatedContent.add(promptMessage);
-      if (resultMessage != null) {
-        _generatedContent.add(resultMessage);
-      }
-      _loading = false;
-      _scrollDown();
-    });
-  }
-
-  Future<void> _editWithStyle() async {
-    if (_sourceImage == null) {
-      _showError('Please pick a source image for style editing.');
-      return;
-    }
-    setState(() {
-      _loading = true;
-    });
-
-    final String prompt = _textController.text;
-    final promptMessage = MessageData(
-      imageBytes: _sourceImage!.bytesBase64Encoded,
-      text: prompt,
-      fromUser: true,
-    );
-    MessageData? resultMessage;
-    try {
-      // ignore: experimental_member_use
-      final response = await widget.model.editImage(
-        [
-          // ignore: experimental_member_use
-          ImagenStyleReference(
-            image: _sourceImage!,
-            description: 'van goh style',
-            referenceId: 1,
-          ),
-        ],
-        prompt,
-        // ignore: experimental_member_use
-        config: ImagenEditingConfig(editSteps: 50),
-      );
-      if (response.images.isNotEmpty) {
-        final editedImage = response.images[0];
-
-        resultMessage = MessageData(
-          imageBytes: editedImage.bytesBase64Encoded,
-          text: 'Edited image with style: $prompt',
-          fromUser: false,
-        );
-      } else {
-        _showError('No image was returned from style editing.');
-      }
-    } catch (e) {
-      _showError('Error performing style edit: $e');
-    }
-
-    setState(() {
-      _generatedContent.add(promptMessage);
-      if (resultMessage != null) {
-        _generatedContent.add(resultMessage);
-      }
-
-      _loading = false;
-      _scrollDown();
-    });
-  }
-
-  Future<void> _generateImageFromPrompt(String prompt) async {
-    setState(() {
-      _loading = true;
-    });
-    MessageData? resultMessage;
-    try {
-      var response = await widget.model.generateImages(prompt);
-
-      if (response.images.isNotEmpty) {
-        var imagenImage = response.images[0];
-
-        resultMessage = MessageData(
-          imageBytes: imagenImage.bytesBase64Encoded,
-          text: prompt,
-          fromUser: false,
-        );
-      } else {
-        // Handle the case where no images were generated
-        _showError('Error: No images were generated.');
-      }
-    } catch (e) {
-      _showError(e.toString());
-    }
-
-    setState(() {
-      if (resultMessage != null) {
-        _generatedContent.add(resultMessage);
-      }
-
-      _loading = false;
-      _scrollDown();
-    });
-  }
-  // NOTE: Keep this API private until future release.
-  // Future<void> _testImagenGCS(String prompt) async {
-  //   setState(() {
-  //     _loading = true;
-  //   });
-  //   var gcsUrl = 'gs://vertex-ai-example-ef5a2.appspot.com/imagen';
-
-  //   var response = await widget.model.generateImagesGCS(prompt, gcsUrl);
-
-  //   if (response.images.isNotEmpty) {
-  //     var imagenImage = response.images[0];
-  //     final returnImageUri = imagenImage.gcsUri;
-  //     final reference = FirebaseStorage.instance.refFromURL(returnImageUri);
-  //     final downloadUrl = await reference.getDownloadURL();
-  //     // Process the image
-  //     _generatedContent.add(
-  //       MessageData(
-  //         image: Image(image: NetworkImage(downloadUrl)),
-  //         text: prompt,
-  //         fromUser: false,
-  //       ),
-  //     );
-  //   } else {
-  //     // Handle the case where no images were generated
-  //     _showError('Error: No images were generated.');
-  //   }
-  //   setState(() {
-  //     _loading = false;
-  //   });
-  // }
-
-  void _showError(String message) {
-    showDialog<void>(
-      context: context,
-      builder: (context) {
-        return AlertDialog(
-          title: const Text('Something went wrong'),
-          content: SingleChildScrollView(
-            child: SelectableText(message),
-          ),
-          actions: [
-            TextButton(
-              onPressed: () {
-                Navigator.of(context).pop();
-              },
-              child: const Text('OK'),
-            ),
-          ],
-        );
-      },
-    );
-  }
-}
diff --git a/packages/firebase_ai/firebase_ai/example/lib/pages/server_template_page.dart b/packages/firebase_ai/firebase_ai/example/lib/pages/server_template_page.dart
index 1be4e6d11ffe..10386f3e4d7b 100644
--- a/packages/firebase_ai/firebase_ai/example/lib/pages/server_template_page.dart
+++ b/packages/firebase_ai/firebase_ai/example/lib/pages/server_template_page.dart
@@ -40,8 +40,6 @@ class _ServerTemplatePageState extends State<ServerTemplatePage> {
 
   // ignore: experimental_member_use
   TemplateGenerativeModel? _templateGenerativeModel;
-  // ignore: experimental_member_use
-  TemplateImagenModel? _templateImagenModel;
 
   @override
   void initState() {
@@ -54,16 +52,10 @@ class _ServerTemplatePageState extends State<ServerTemplatePage> {
       _templateGenerativeModel =
           // ignore: experimental_member_use
           FirebaseAI.vertexAI(location: 'global').templateGenerativeModel();
-      _templateImagenModel =
-          // ignore: experimental_member_use
-          FirebaseAI.vertexAI(location: 'global').templateImagenModel();
     } else {
       _templateGenerativeModel =
           // ignore: experimental_member_use
           FirebaseAI.googleAI().templateGenerativeModel();
-      _templateImagenModel =
-          // ignore: experimental_member_use
-          FirebaseAI.googleAI().templateImagenModel();
     }
   }
 
@@ -130,16 +122,6 @@ class _ServerTemplatePageState extends State<ServerTemplatePage> {
                     dimension: 15,
                   ),
                   if (!_loading) ...[
-                    IconButton(
-                      onPressed: () async {
-                        await _serverTemplateImagen(_textController.text);
-                      },
-                      icon: Icon(
-                        Icons.image_search,
-                        color: Theme.of(context).colorScheme.primary,
-                      ),
-                      tooltip: 'Imagen',
-                    ),
                     IconButton(
                       onPressed: () async {
                         await _serverTemplateImageInput(_textController.text);
@@ -254,55 +236,6 @@ class _ServerTemplatePageState extends State<ServerTemplatePage> {
     }
   }
 
-  Future<void> _serverTemplateImagen(String message) async {
-    setState(() {
-      _loading = true;
-    });
-    MessageData? resultMessage;
-    try {
-      _messages.add(MessageData(text: message, fromUser: true));
-      // ignore: experimental_member_use
-      var response = await _templateImagenModel?.generateImages(
-        'portrait-googleai',
-        inputs: {
-          'animal': message,
-        },
-      );
-
-      if (response!.images.isNotEmpty) {
-        var imagenImage = response.images[0];
-
-        resultMessage = MessageData(
-          imageBytes: imagenImage.bytesBase64Encoded,
-          text: message,
-          fromUser: false,
-        );
-      } else {
-        // Handle the case where no images were generated
-        _showError('Error: No images were generated.');
-      }
-
-      setState(() {
-        if (resultMessage != null) {
-          _messages.add(resultMessage);
-        }
-        _loading = false;
-        _scrollDown();
-      });
-    } catch (e) {
-      _showError(e.toString());
-      setState(() {
-        _loading = false;
-      });
-    } finally {
-      _textController.clear();
-      setState(() {
-        _loading = false;
-      });
-      _textFieldFocus.requestFocus();
-    }
-  }
-
   Future<void> _serverTemplateImageInput(String message) async {
     setState(() {
       _loading = true;
diff --git a/packages/firebase_ai/firebase_ai/example/lib/utils/image_utils.dart b/packages/firebase_ai/firebase_ai/example/lib/utils/image_utils.dart
deleted file mode 100644
index f297c9b25e66..000000000000
--- a/packages/firebase_ai/firebase_ai/example/lib/utils/image_utils.dart
+++ /dev/null
@@ -1,150 +0,0 @@
-// 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.
-import 'package:firebase_ai/firebase_ai.dart';
-import 'package:image/image.dart' as img;
-import 'package:flutter/foundation.dart';
-
-/// The parameters passed to the isolate
-class _IsolateParams {
-  final Uint8List imageBytes;
-  // ignore: experimental_member_use
-  final ImagenDimensions newDimensions;
-  // ignore: experimental_member_use
-  final ImagenImagePlacement newPosition;
-
-  _IsolateParams({
-    required Uint8List imageBytes,
-    required this.newDimensions,
-    required this.newPosition,
-  }) : imageBytes = Uint8List.fromList(imageBytes);
-}
-
-/// The results returned from the isolate
-class _IsolateResult {
-  final Uint8List paddedImageBytes;
-  final Uint8List maskBytes;
-
-  _IsolateResult({
-    required this.paddedImageBytes,
-    required this.maskBytes,
-  });
-}
-
-/// Processes the image request.
-///
-/// This is the top-level function that will run in the background isolate.
-/// It uses the 'image' package for all manipulations.
-Future<_IsolateResult> _generateMaskAndPadInIsolate(
-  _IsolateParams params,
-) async {
-  // 1. Decode the original image
-  final originalImage = img.decodeImage(params.imageBytes);
-  if (originalImage == null) {
-    throw StateError('Failed to decode image in isolate.');
-  }
-  // Validate dimensions
-  if (originalImage.width >= params.newDimensions.width ||
-      originalImage.height >= params.newDimensions.height) {
-    throw ArgumentError(
-      'New Dimensions must be strictly larger than original image dimensions.',
-    );
-  }
-  // 2. Calculate the position
-  // ignore: experimental_member_use
-  final originalDimensions = ImagenDimensions(
-    width: originalImage.width,
-    height: originalImage.height,
-  );
-  final normalizedPosition = params.newPosition.normalizeToDimensions(
-    originalDimensions,
-    params.newDimensions,
-  );
-  final x = normalizedPosition.x ?? 0;
-  final y = normalizedPosition.y ?? 0;
-  // 3. Create the mask image
-  final mask = img.Image(
-    width: params.newDimensions.width,
-    height: params.newDimensions.height,
-  );
-  // Fill with white and draw a black rectangle for the original image area
-  img.fill(mask, color: img.ColorRgb8(255, 255, 255));
-  img.fillRect(
-    mask,
-    x1: x,
-    y1: y,
-    x2: x + originalImage.width,
-    y2: y + originalImage.height,
-    color: img.ColorRgb8(0, 0, 0),
-  );
-  // 4. Create the padded image
-  final paddedImage = img.Image(
-    width: params.newDimensions.width,
-    height: params.newDimensions.height,
-  );
-  // Fill with black and draw the original image on top
-  img.fill(paddedImage, color: img.ColorRgb8(0, 0, 0));
-  img.compositeImage(
-    paddedImage,
-    originalImage,
-    dstX: x,
-    dstY: y,
-  );
-  // 5. Encode both images to PNG format (which is lossless)
-  final maskBytes = img.encodePng(mask);
-  final paddedBytes = img.encodePng(paddedImage);
-  return _IsolateResult(
-    paddedImageBytes: Uint8List.fromList(paddedBytes),
-    maskBytes: Uint8List.fromList(maskBytes),
-  );
-}
-
-/// Generates a mask and pads the image for outpainting.
-// ignore: experimental_member_use
-Future<List<ImagenReferenceImage>> generateMaskAndPadForOutpainting({
-  required ImagenInlineImage image,
-  // ignore: experimental_member_use
-  required ImagenDimensions newDimensions,
-  // ignore: experimental_member_use
-  ImagenImagePlacement newPosition = ImagenImagePlacement.center,
-}) async {
-  // Prepare the parameters for the isolate
-  // Note: We are assuming `image` has a way to get its raw bytes,
-  // which seems to be the case from `bytesBase64Encoded` in your example.
-  // If not, you'd need to convert the `ui.Image` to bytes here first.
-  final params = _IsolateParams(
-    imageBytes: image.bytesBase64Encoded, // Assuming this is Uint8List
-    newDimensions: newDimensions,
-    newPosition: newPosition,
-  );
-  // Execute the image processing in a separate isolate and wait for the result
-  final result = await compute(_generateMaskAndPadInIsolate, params);
-
-  // Use the resulting bytes to create your final objects
-  return [
-    // ignore: experimental_member_use
-    ImagenRawImage(
-      image: ImagenInlineImage(
-        bytesBase64Encoded: result.paddedImageBytes,
-        mimeType: 'image/png', // The isolate always returns PNG
-      ),
-    ),
-    // ignore: experimental_member_use
-    ImagenRawMask(
-      mask: ImagenInlineImage(
-        bytesBase64Encoded: result.maskBytes,
-        mimeType: 'image/png', // The isolate always returns PNG
-      ),
-    ),
-  ];
-}
diff --git a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_api.dart b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_api.dart
index 20810f86690e..8bf9ef018b9a 100644
--- a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_api.dart
+++ b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_api.dart
@@ -16,6 +16,11 @@ import 'dart:developer';
 /// Specifies the level of safety filtering for image generation.
 ///
 /// If not specified, default will be "block_medium_and_above".
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenSafetyFilterLevel {
   /// Strongest filtering level, most strict blocking.
   blockLowAndAbove('block_low_and_above'),
@@ -57,6 +62,11 @@ enum ImagenSafetyFilterLevel {
 /// Allow generation of people by the model.
 ///
 /// If not specified, the default value is "allow_adult".
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenPersonFilterLevel {
   /// Disallow the inclusion of people or faces in images.
   blockAll('dont_allow'),
@@ -92,6 +102,11 @@ enum ImagenPersonFilterLevel {
 /// A class representing safety settings for image generation.
 ///
 /// It includes a safety filter level and a person filter level.
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenSafetySettings {
   // ignore: public_member_api_docs
   ImagenSafetySettings(this.safetyFilterLevel, this.personFilterLevel);
@@ -114,6 +129,11 @@ final class ImagenSafetySettings {
 /// The aspect ratio for the image.
 ///
 /// The default value is "1:1".
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenAspectRatio {
   /// Square (1:1).
   square1x1('1:1'),
@@ -155,6 +175,11 @@ enum ImagenAspectRatio {
 }
 
 /// Configuration options for image generation.
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenGenerationConfig {
   // ignore: public_member_api_docs
   ImagenGenerationConfig(
@@ -195,6 +220,11 @@ final class ImagenGenerationConfig {
 }
 
 /// Represents the image format and compression quality.
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenFormat {
   // ignore: public_member_api_docs
   ImagenFormat(this.mimeType, this.compressionQuality);
diff --git a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_content.dart b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_content.dart
index ef8be1bb31f6..01af99045211 100644
--- a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_content.dart
+++ b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_content.dart
@@ -28,6 +28,11 @@ sealed class ImagenImage {
 }
 
 /// Represents an image stored as a base64-encoded string.
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenInlineImage implements ImagenImage {
   // ignore: public_member_api_docs
   ImagenInlineImage({
diff --git a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_edit.dart b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_edit.dart
index 5cff20d08bdb..99c8c1064c6a 100644
--- a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_edit.dart
+++ b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_edit.dart
@@ -18,6 +18,11 @@ import 'package:meta/meta.dart';
 
 /// The desired outcome of the image editing.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenEditMode {
   /// The result of the editing will be an insertion of the prompt in the masked
   /// region.
@@ -37,6 +42,11 @@ enum ImagenEditMode {
 
 /// The type of the subject in the image.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenSubjectReferenceType {
   /// The subject is a person.
   person('SUBJECT_TYPE_PERSON'),
@@ -56,6 +66,11 @@ enum ImagenSubjectReferenceType {
 
 /// The type of control image.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenControlType {
   /// Use edge detection to ensure the new image follow the same outlines.
   canny('CONTROL_TYPE_CANNY'),
@@ -81,6 +96,11 @@ enum ImagenControlType {
 
 /// The mode of the mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 enum ImagenMaskMode {
   /// The mask is user provided.
   userProvided('MASK_MODE_USER_PROVIDED'),
@@ -108,6 +128,11 @@ sealed class ImagenReferenceConfig {
 
 /// The configuration for the mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenMaskConfig extends ImagenReferenceConfig {
   // ignore: public_member_api_docs
   ImagenMaskConfig({
@@ -137,6 +162,11 @@ final class ImagenMaskConfig extends ImagenReferenceConfig {
 
 /// The configuration for the subject.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenSubjectConfig extends ImagenReferenceConfig {
   // ignore: public_member_api_docs
   ImagenSubjectConfig({
@@ -161,6 +191,11 @@ final class ImagenSubjectConfig extends ImagenReferenceConfig {
 
 /// The configuration for the style.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenStyleConfig extends ImagenReferenceConfig {
   // ignore: public_member_api_docs
   ImagenStyleConfig({
@@ -179,6 +214,11 @@ final class ImagenStyleConfig extends ImagenReferenceConfig {
 
 /// The configuration for the control.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenControlConfig extends ImagenReferenceConfig {
   // ignore: public_member_api_docs
   ImagenControlConfig({
@@ -214,6 +254,11 @@ final class ImagenControlConfig extends ImagenReferenceConfig {
 
 /// The configuration for image editing.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenEditingConfig {
   // ignore: public_member_api_docs
   ImagenEditingConfig({
@@ -230,6 +275,11 @@ final class ImagenEditingConfig {
 
 /// The dimensions of an image.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenDimensions {
   // ignore: public_member_api_docs
   ImagenDimensions({
@@ -246,6 +296,11 @@ final class ImagenDimensions {
 
 /// The placement of an image.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenImagePlacement {
   const ImagenImagePlacement._(this.x, this.y);
 
diff --git a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_model.dart b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_model.dart
index 54789dcfadcc..197ed5714866 100644
--- a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_model.dart
+++ b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_model.dart
@@ -24,6 +24,11 @@ part of '../base_model.dart';
 /// > Warning: For Vertex AI in Firebase, image generation using Imagen 3 models
 /// is in Public Preview, which means that the feature is not subject to any SLA
 /// or deprecation policy and could change in backwards-incompatible ways.
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenModel extends BaseApiClientModel {
   ImagenModel._(
       {required FirebaseApp app,
diff --git a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_reference.dart b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_reference.dart
index c05785168424..f8cb307bb456 100644
--- a/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_reference.dart
+++ b/packages/firebase_ai/firebase_ai/lib/src/imagen/imagen_reference.dart
@@ -30,6 +30,11 @@ enum _ReferenceType {
 
 /// A reference image for image editing.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 sealed class ImagenReferenceImage {
   ImagenReferenceImage._({
     this.referenceConfig,
@@ -72,6 +77,11 @@ sealed class ImagenReferenceImage {
 
 /// A reference image that is a mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 sealed class ImagenMaskReference extends ImagenReferenceImage {
   // ignore: public_member_api_docs
   ImagenMaskReference({
@@ -86,6 +96,11 @@ sealed class ImagenMaskReference extends ImagenReferenceImage {
 
 /// A raw image.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenRawImage extends ImagenReferenceImage {
   // ignore: public_member_api_docs
   ImagenRawImage({
@@ -96,6 +111,11 @@ final class ImagenRawImage extends ImagenReferenceImage {
 
 /// A raw mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenRawMask extends ImagenMaskReference {
   // ignore: public_member_api_docs
   ImagenRawMask({
@@ -113,6 +133,11 @@ final class ImagenRawMask extends ImagenMaskReference {
 
 /// A semantic mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenSemanticMask extends ImagenMaskReference {
   // ignore: public_member_api_docs
   ImagenSemanticMask({
@@ -130,6 +155,11 @@ final class ImagenSemanticMask extends ImagenMaskReference {
 
 /// A background mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenBackgroundMask extends ImagenMaskReference {
   // ignore: public_member_api_docs
   ImagenBackgroundMask({
@@ -145,6 +175,11 @@ final class ImagenBackgroundMask extends ImagenMaskReference {
 
 /// A foreground mask.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenForegroundMask extends ImagenMaskReference {
   // ignore: public_member_api_docs
   ImagenForegroundMask({
@@ -160,6 +195,11 @@ final class ImagenForegroundMask extends ImagenMaskReference {
 
 /// A subject reference.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenSubjectReference extends ImagenReferenceImage {
   // ignore: public_member_api_docs
   ImagenSubjectReference({
@@ -179,6 +219,11 @@ final class ImagenSubjectReference extends ImagenReferenceImage {
 
 /// A style reference.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenStyleReference extends ImagenReferenceImage {
   // ignore: public_member_api_docs
   ImagenStyleReference({
@@ -196,6 +241,11 @@ final class ImagenStyleReference extends ImagenReferenceImage {
 
 /// A control reference.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class ImagenControlReference extends ImagenReferenceImage {
   // ignore: public_member_api_docs
   ImagenControlReference({
diff --git a/packages/firebase_ai/firebase_ai/lib/src/server_template/template_imagen_model.dart b/packages/firebase_ai/firebase_ai/lib/src/server_template/template_imagen_model.dart
index e27dd5eaaa9d..0bfe90caebdc 100644
--- a/packages/firebase_ai/firebase_ai/lib/src/server_template/template_imagen_model.dart
+++ b/packages/firebase_ai/firebase_ai/lib/src/server_template/template_imagen_model.dart
@@ -16,6 +16,11 @@ part of '../base_model.dart';
 
 /// An image model that connects to a remote server template.
 @experimental
+@Deprecated(
+  'All Imagen models are deprecated and will shut down as early as June 2026. '
+  'As a replacement, you can migrate your apps to use Gemini Image models (the '
+  '"Nano Banana" models)(https://firebase.google.com/docs/ai-logic/imagen-models-migration).',
+)
 final class TemplateImagenModel extends BaseTemplateApiClientModel {
   TemplateImagenModel._testModel(
       {required FirebaseApp app,