diff --git a/studio/frontend/src/features/chat/stores/chat-runtime-store.ts b/studio/frontend/src/features/chat/stores/chat-runtime-store.ts
index 59bcf085b9..de2095af03 100644
--- a/studio/frontend/src/features/chat/stores/chat-runtime-store.ts
+++ b/studio/frontend/src/features/chat/stores/chat-runtime-store.ts
@@ -1432,12 +1432,6 @@ export const useChatRuntimeStore = create<ChatRuntimeStore>((set, get) => ({
           nextMaxTokens = cap;
         }
       }
-      // Persist Deep Research off when switching to an external model so a refresh
-      // does not rehydrate it (the adapter requires a selected local model).
-      // Mirrors setIncognito / clearCheckpoint / the tool-mode setters.
-      if (isExternalModelId(modelId)) {
-        saveBool(CHAT_DEEP_RESEARCH_ENABLED_KEY, false);
-      }
       return {
         params: {
           ...state.params,
@@ -1754,12 +1748,7 @@ export const useChatRuntimeStore = create<ChatRuntimeStore>((set, get) => ({
   setWebFetchToolsEnabled: (webFetchToolsEnabled) =>
     set(() => {
       saveBool(CHAT_WEB_FETCH_TOOLS_ENABLED_KEY, webFetchToolsEnabled);
-      // Deep Research is mutually exclusive with the tool modes; clearing it here
-      // mirrors the other mode setters so a persisted flag cannot leave both on.
-      if (webFetchToolsEnabled) saveBool(CHAT_DEEP_RESEARCH_ENABLED_KEY, false);
-      return webFetchToolsEnabled
-        ? { webFetchToolsEnabled, deepResearchEnabled: false }
-        : { webFetchToolsEnabled };
+      return { webFetchToolsEnabled };
     }),
   setRagEnabled: (ragEnabled) => set(() => ({ ragEnabled })),
   setRagSource: (ragSource) =>