diff --git a/app/constant.ts b/app/constant.ts
index f617d3224..e3c751b7b 100644
--- a/app/constant.ts
+++ b/app/constant.ts
@@ -112,12 +112,23 @@ export const KnowledgeCutOffDate: Record<string, string> = {
   "gpt-4-1106-preview": "2023-04",
   "gpt-4-0125-preview": "2023-12",
   "gpt-4-vision-preview": "2023-04",
+  "gpt-4-turbo-2024-04-09": "2023-12",
+  
   // After improvements,
   // it's now easier to add "KnowledgeCutOffDate" instead of stupid hardcoding it, as was done previously.
   "gemini-pro": "2023-12",
 };
 
 export const DEFAULT_MODELS = [
+  {
+    name: "gpt-4-turbo-2024-04-09",
+    available: true,
+    provider: {
+      id: "openai",
+      providerName: "OpenAI",
+      providerType: "openai",
+    },
+  },
   {
     name: "gpt-4",
     available: true,
@@ -129,7 +140,7 @@ export const DEFAULT_MODELS = [
   },
   {
     name: "gpt-4-0314",
-    available: true,
+    available: false,
     provider: {
       id: "openai",
       providerName: "OpenAI",
@@ -138,7 +149,7 @@ export const DEFAULT_MODELS = [
   },
   {
     name: "gpt-4-0613",
-    available: true,
+    available: false,
     provider: {
       id: "openai",
       providerName: "OpenAI",
@@ -156,7 +167,7 @@ export const DEFAULT_MODELS = [
   },
   {
     name: "gpt-4-32k-0314",
-    available: true,
+    available: false,
     provider: {
       id: "openai",
       providerName: "OpenAI",
@@ -165,7 +176,7 @@ export const DEFAULT_MODELS = [
   },
   {
     name: "gpt-4-32k-0613",
-    available: true,
+    available: false,
     provider: {
       id: "openai",
       providerName: "OpenAI",
@@ -200,6 +211,14 @@ export const DEFAULT_MODELS = [
     },
   },
   {
+    name: "gpt-4-turbo-preview",
+    available: true,
+    provider: {
+      id: "openai",
+      providerName: "OpenAI",
+      providerType: "openai",
+    },
+  },  {
     name: "gpt-4-vision-preview",
     available: true,
     provider: {