[Vertex AI] Update samples/docs to use gemini-1.5-flash (#13099)

Author: andrewheard

FirebaseVertexAI/CHANGELOG.md

@@ -1,3 +1,10 @@
+# 10.28.0
+- [changed] Removed uses of the `gemini-1.5-flash-preview-0514` model in docs
+  and samples. Developers should now use the auto-updated versions,
+  `gemini-1.5-pro` or `gemini-1.5-flash`, or a specific stable version; see
+  [available model names](https://firebase.google.com/docs/vertex-ai/gemini-models#available-model-names)
+  for more details. (#13099)
+
 # 10.27.0
 - [changed] Removed uses of the `gemini-1.5-pro-preview-0409` model in docs and
   samples. Developers should now use `gemini-1.5-pro-preview-0514` or

FirebaseVertexAI/Sample/ChatSample/ViewModels/ConversationViewModel.swift

@@ -36,7 +36,7 @@ class ConversationViewModel: ObservableObject {
   private var chatTask: Task<Void, Never>?
 
   init() {
-    model = VertexAI.vertexAI().generativeModel(modelName: "gemini-1.5-flash-preview-0514")
+    model = VertexAI.vertexAI().generativeModel(modelName: "gemini-1.5-flash")
     chat = model.startChat()
   }
 

FirebaseVertexAI/Sample/FunctionCallingSample/ViewModels/FunctionCallingViewModel.swift

@@ -39,7 +39,7 @@ class FunctionCallingViewModel: ObservableObject {
 
   init() {
     model = VertexAI.vertexAI().generativeModel(
-      modelName: "gemini-1.5-flash-preview-0514",
+      modelName: "gemini-1.5-flash",
       tools: [Tool(functionDeclarations: [
         FunctionDeclaration(
           name: "get_exchange_rate",

FirebaseVertexAI/Sample/GenerativeAIMultimodalSample/ViewModels/PhotoReasoningViewModel.swift

@@ -44,7 +44,7 @@ class PhotoReasoningViewModel: ObservableObject {
   private var model: GenerativeModel?
 
   init() {
-    model = VertexAI.vertexAI().generativeModel(modelName: "gemini-1.5-flash-preview-0514")
+    model = VertexAI.vertexAI().generativeModel(modelName: "gemini-1.5-flash")
   }
 
   func reason() async {

FirebaseVertexAI/Sample/GenerativeAITextSample/ViewModels/SummarizeViewModel.swift

@@ -32,7 +32,7 @@ class SummarizeViewModel: ObservableObject {
   private var model: GenerativeModel?
 
   init() {
-    model = VertexAI.vertexAI().generativeModel(modelName: "gemini-1.5-flash-preview-0514")
+    model = VertexAI.vertexAI().generativeModel(modelName: "gemini-1.5-flash")
   }
 
   func summarize(inputText: String) async {

FirebaseVertexAI/Sources/VertexAI.swift

@@ -64,8 +64,8 @@ public class VertexAI: NSObject {
   /// guidance on choosing an appropriate model for your use case.
   ///
   /// - Parameters:
-  ///   - modelName: The name of the model to use, for example `"gemini-1.5-flash-preview-0514"`;
-  ///     see [available model names
+  ///   - modelName: The name of the model to use, for example `"gemini-1.5-flash"`; see
+  ///     [available model names
   ///     ](https://firebase.google.com/docs/vertex-ai/gemini-models#available-model-names) for a
   ///     list of supported model names.
   ///   - generationConfig: The content generation parameters your model should use.