Expose chat-latest and default Quick Question to it

ios/Packages/Sybil/Sources/Sybil/SybilSettingsStore.swift

@@ -52,9 +52,9 @@ final class SybilSettingsStore {
         self.preferredModelByProvider = preferredModels
 
         self.quickQuestionPreferredProvider =
-            defaults.string(forKey: Keys.quickQuestionPreferredProvider).flatMap(Provider.init(rawValue:)) ?? provider
+            defaults.string(forKey: Keys.quickQuestionPreferredProvider).flatMap(Provider.init(rawValue:)) ?? .openai
         self.quickQuestionPreferredModelByProvider = [
-            .openai: defaults.string(forKey: Keys.quickQuestionPreferredOpenAIModel) ?? preferredModels[.openai] ?? "gpt-4.1-mini",
+            .openai: defaults.string(forKey: Keys.quickQuestionPreferredOpenAIModel) ?? "chat-latest",
             .anthropic: defaults.string(forKey: Keys.quickQuestionPreferredAnthropicModel) ?? preferredModels[.anthropic] ?? "claude-3-5-sonnet-latest",
             .xai: defaults.string(forKey: Keys.quickQuestionPreferredXAIModel) ?? preferredModels[.xai] ?? "grok-3-mini",
             .gemini: defaults.string(forKey: Keys.quickQuestionPreferredGeminiModel) ?? preferredModels[.gemini] ?? "gemini-3.5-flash",

ios/Packages/Sybil/Sources/Sybil/SybilViewModel.swift

@@ -222,7 +222,7 @@ final class SybilViewModel {
     private let clientFactory: (APIConfiguration) -> any SybilAPIClienting
 
     private let fallbackModels: [Provider: [String]] = [
-        .openai: ["gpt-4.1-mini"],
+        .openai: ["gpt-4.1-mini", "chat-latest"],
         .anthropic: ["claude-3-5-sonnet-latest"],
         .xai: ["grok-3-mini"],
         .gemini: ["gemini-3.5-flash", "gemini-flash-latest"],

ios/Packages/Sybil/Tests/SybilTests/SybilTests.swift

@@ -52,6 +52,7 @@ private actor MockSybilClient: SybilAPIClienting {
     private let updateChatStarResponses: [String: ChatSummary]
     private let updateSearchStarResponses: [String: SearchSummary]
     private let activeRunsResponse: ActiveRunsResponse
+    private let modelCatalogResponse: ModelCatalogResponse
 
     private var snapshot = MockClientCallSnapshot()
     private var lastCreateChatCall: ChatCreateCallSnapshot?
@@ -84,7 +85,8 @@ private actor MockSybilClient: SybilAPIClienting {
         updateChatStarResponses: [String: ChatSummary] = [:],
         updateSearchStarResponses: [String: SearchSummary] = [:],
         activeRunsResponse: ActiveRunsResponse = ActiveRunsResponse(),
-        workspaceItemsResponse: [WorkspaceItem]? = nil
+        workspaceItemsResponse: [WorkspaceItem]? = nil,
+        modelCatalogResponse: ModelCatalogResponse = ModelCatalogResponse(providers: [:])
     ) {
         self.chatsResponse = chatsResponse
         self.searchesResponse = searchesResponse
@@ -98,6 +100,7 @@ private actor MockSybilClient: SybilAPIClienting {
         self.updateChatStarResponses = updateChatStarResponses
         self.updateSearchStarResponses = updateSearchStarResponses
         self.activeRunsResponse = activeRunsResponse
+        self.modelCatalogResponse = modelCatalogResponse
     }
 
     private static func makeWorkspaceItems(chats: [ChatSummary], searches: [SearchSummary]) -> [WorkspaceItem] {
@@ -306,7 +309,7 @@ private actor MockSybilClient: SybilAPIClienting {
     }
 
     func listModels() async throws -> ModelCatalogResponse {
-        ModelCatalogResponse(providers: [:])
+        modelCatalogResponse
     }
 
     func getActiveRuns() async throws -> ActiveRunsResponse {
@@ -1257,6 +1260,7 @@ private func makeCompletionToolCall(
     #expect(snapshot.runQuickQuestionStream == 1)
     #expect(snapshot.runCompletionStream == 0)
     #expect(body?.provider == .openai)
+    #expect(body?.model == "chat-latest")
     #expect(body?.question == "How do I reset my password?")
     #expect(viewModel.quickQuestionAnswerText == "Reset it from Settings.")
     #expect(!viewModel.isQuickQuestionSending)
@@ -1370,6 +1374,42 @@ private func makeCompletionToolCall(
     #expect(viewModel.quickQuestionPrompt.isEmpty)
 }
 
+@MainActor
+@Test func quickQuestionDefaultsToChatLatestIndependentlyOfRegularChatPreferences() async {
+    let defaults = UserDefaults(suiteName: #function)!
+    defaults.removePersistentDomain(forName: #function)
+    defer { defaults.removePersistentDomain(forName: #function) }
+    defaults.set("anthropic", forKey: "sybil.ios.preferredProvider")
+    defaults.set("gpt-4o", forKey: "sybil.ios.preferredOpenAIModel")
+    let settings = SybilSettingsStore(defaults: defaults)
+    let client = MockSybilClient(modelCatalogResponse: ModelCatalogResponse(providers: [
+        .openai: ProviderModelInfo(models: ["gpt-4.1-mini", "chat-latest"], loadedAt: nil, error: nil),
+        .anthropic: ProviderModelInfo(models: ["claude-3-5-sonnet-latest"], loadedAt: nil, error: nil)
+    ]))
+    let viewModel = SybilViewModel(settings: settings) { _ in client }
+
+    #expect(viewModel.provider == .anthropic)
+    #expect(settings.preferredModelByProvider[.openai] == "gpt-4o")
+    #expect(viewModel.quickQuestionProvider == .openai)
+    #expect(viewModel.quickQuestionModel == "chat-latest")
+    #expect(viewModel.quickQuestionProviderModelOptions.contains("chat-latest"))
+
+    viewModel.setQuickQuestionProvider(.anthropic)
+    viewModel.setQuickQuestionProvider(.openai)
+    #expect(viewModel.quickQuestionModel == "chat-latest")
+
+    await viewModel.bootstrap()
+    #expect(viewModel.quickQuestionModel == "chat-latest")
+    #expect(viewModel.quickQuestionProviderModelOptions == ["gpt-4.1-mini", "chat-latest"])
+
+    viewModel.setQuickQuestionProvider(.anthropic)
+    viewModel.setQuickQuestionProvider(.openai)
+    #expect(viewModel.quickQuestionModel == "chat-latest")
+    #expect(SybilSettingsStore(defaults: defaults).quickQuestionPreferredModelByProvider[.openai] == "chat-latest")
+    #expect(settings.preferredProvider == .anthropic)
+    #expect(settings.preferredModelByProvider[.openai] == "gpt-4o")
+}
+
 @MainActor
 @Test func quickQuestionProviderAndModelSelectionPersistSeparately() async throws {
     let defaults = UserDefaults(suiteName: #function)!

ios/README.md

@@ -16,6 +16,9 @@ second **Option+Space**, the close button, or clicking outside dismisses it.
 Hiding the panel preserves the draft and answer and lets an in-flight answer finish.
 **Open in Chat** saves the question and answer in the regular workspace.
 
+Quick Question defaults to OpenAI `chat-latest` on iPhone, iPad, and Mac. Its saved
+provider/model selection takes precedence and is separate from regular chat preferences.
+
 The regular Mac chat/search composer uses the same Return/Shift+Return rules.
 Holding Return does not repeatedly submit. On iOS, Return submits from Quick
 Question, while the normal chat/search composer continues to use Return for a