diff --git a/app/client/platforms/openai.ts b/app/client/platforms/openai.ts
index dfe41300..e140a1ef 100644
--- a/app/client/platforms/openai.ts
+++ b/app/client/platforms/openai.ts
@@ -1,5 +1,6 @@
 import {
   DEFAULT_API_HOST,
+  DEFAULT_MODELS,
   OpenaiPath,
   REQUEST_TIMEOUT_MS,
 } from "@/app/constant";
@@ -23,6 +24,8 @@ export interface OpenAIListModelResponse {
 }
 
 export class ChatGPTApi implements LLMApi {
+  private disableListModels = true;
+
   path(path: string): string {
     let openaiUrl = useAccessStore.getState().openaiUrl;
     if (openaiUrl.length === 0) {
@@ -246,6 +249,10 @@ export class ChatGPTApi implements LLMApi {
   }
 
   async models(): Promise<LLMModel[]> {
+    if (this.disableListModels) {
+      return DEFAULT_MODELS.slice();
+    }
+
     const res = await fetch(this.path(OpenaiPath.ListModelPath), {
       method: "GET",
       headers: {
diff --git a/app/components/chat.tsx b/app/components/chat.tsx
index b6380add..8a74242e 100644
--- a/app/components/chat.tsx
+++ b/app/components/chat.tsx
@@ -710,7 +710,7 @@ export function Chat() {
   };
 
   const findLastUserIndex = (messageId: string) => {
-    // find last user input message and resend
+    // find last user input message
     let lastUserMessageIndex: number | null = null;
     for (let i = 0; i < session.messages.length; i += 1) {
       const message = session.messages[i];
@@ -737,17 +737,56 @@ export function Chat() {
   };
 
   const onResend = (message: ChatMessage) => {
-    let content = message.content;
+    // when it is resending a message
+    // 1. for a user's message, find the next bot response
+    // 2. for a bot's message, find the last user's input
+    // 3. delete original user input and bot's message
+    // 4. resend the user's input
+
+    const resendingIndex = session.messages.findIndex(
+      (m) => m.id === message.id,
+    );
+
+    if (resendingIndex <= 0 || resendingIndex >= session.messages.length) {
+      console.error("[Chat] failed to find resending message", message);
+      return;
+    }
+
+    let userMessage: ChatMessage | undefined;
+    let botMessage: ChatMessage | undefined;
 
-    if (message.role === "assistant" && message.id) {
-      const userIndex = findLastUserIndex(message.id);
-      if (userIndex) {
-        content = session.messages.at(userIndex)?.content ?? content;
+    if (message.role === "assistant") {
+      // if it is resending a bot's message, find the user input for it
+      botMessage = message;
+      for (let i = resendingIndex; i >= 0; i -= 1) {
+        if (session.messages[i].role === "user") {
+          userMessage = session.messages[i];
+          break;
+        }
       }
+    } else if (message.role === "user") {
+      // if it is resending a user's input, find the bot's response
+      userMessage = message;
+      for (let i = resendingIndex; i < session.messages.length; i += 1) {
+        if (session.messages[i].role === "assistant") {
+          botMessage = session.messages[i];
+          break;
+        }
+      }
+    }
+
+    if (userMessage === undefined) {
+      console.error("[Chat] failed to resend", message);
+      return;
     }
 
+    // delete the original messages
+    deleteMessage(userMessage.id);
+    deleteMessage(botMessage?.id);
+
+    // resend the message
     setIsLoading(true);
-    chatStore.onUserInput(content).then(() => setIsLoading(false));
+    chatStore.onUserInput(userMessage.content).then(() => setIsLoading(false));
     inputRef.current?.focus();
   };
 
diff --git a/app/components/home.tsx b/app/components/home.tsx
index 96c1b838..b3cec893 100644
--- a/app/components/home.tsx
+++ b/app/components/home.tsx
@@ -28,6 +28,7 @@ import { useAppConfig } from "../store/config";
 import { AuthPage } from "./auth";
 import { getClientConfig } from "../config/client";
 import { api } from "../client/api";
+import { useAccessStore } from "../store";
 
 export function Loading(props: { noLogo?: boolean }) {
   return (
@@ -171,6 +172,7 @@ export function Home() {
 
   useEffect(() => {
     console.log("[Config] got config from build time", getClientConfig());
+    useAccessStore.getState().fetch();
   }, []);
 
   if (!useHasHydrated()) {
diff --git a/app/constant.ts b/app/constant.ts
index df2bc52a..250bd135 100644
--- a/app/constant.ts
+++ b/app/constant.ts
@@ -108,24 +108,4 @@ export const DEFAULT_MODELS = [
     name: "gpt-3.5-turbo-16k-0613",
     available: true,
   },
-  {
-    name: "qwen-v1", // 通义千问
-    available: false,
-  },
-  {
-    name: "ernie", // 文心一言
-    available: false,
-  },
-  {
-    name: "spark", // 讯飞星火
-    available: false,
-  },
-  {
-    name: "llama", // llama
-    available: false,
-  },
-  {
-    name: "chatglm", // chatglm-6b
-    available: false,
-  },
 ] as const;
diff --git a/app/locales/en.ts b/app/locales/en.ts
index de10ee31..2a8c026f 100644
--- a/app/locales/en.ts
+++ b/app/locales/en.ts
@@ -143,8 +143,7 @@ const en: LocaleType = {
     },
     InjectSystemPrompts: {
       Title: "Inject System Prompts",
-      SubTitle:
-        "Forcefully add a simulated ChatGPT system prompt at the beginning of the message list for every request",
+      SubTitle: "Inject a global system prompt for every request",
     },
     InputTemplate: {
       Title: "Input Template",
diff --git a/app/store/access.ts b/app/store/access.ts
index d2806414..c1a802eb 100644
--- a/app/store/access.ts
+++ b/app/store/access.ts
@@ -1,6 +1,6 @@
 import { create } from "zustand";
 import { persist } from "zustand/middleware";
-import { DEFAULT_API_HOST, StoreKey } from "../constant";
+import { DEFAULT_API_HOST, DEFAULT_MODELS, StoreKey } from "../constant";
 import { getHeaders } from "../client/api";
 import { BOT_HELLO } from "./chat";
 import { getClientConfig } from "../config/client";
@@ -11,8 +11,10 @@ export interface AccessControlStore {
 
   needCode: boolean;
   hideUserApiKey: boolean;
-  openaiUrl: string;
   hideBalanceQuery: boolean;
+  disableGPT4: boolean;
+
+  openaiUrl: string;
 
   updateToken: (_: string) => void;
   updateCode: (_: string) => void;
@@ -35,8 +37,10 @@ export const useAccessStore = create<AccessControlStore>()(
       accessCode: "",
       needCode: true,
       hideUserApiKey: false,
-      openaiUrl: DEFAULT_OPENAI_URL,
       hideBalanceQuery: false,
+      disableGPT4: false,
+
+      openaiUrl: DEFAULT_OPENAI_URL,
 
       enabledAccessControl() {
         get().fetch();
@@ -75,8 +79,10 @@ export const useAccessStore = create<AccessControlStore>()(
             console.log("[Config] got config from server", res);
             set(() => ({ ...res }));
 
-            if ((res as any).botHello) {
-              BOT_HELLO.content = (res as any).botHello;
+            if (res.disableGPT4) {
+              DEFAULT_MODELS.forEach(
+                (m: any) => (m.available = !m.name.startsWith("gpt-4")),
+              );
             }
           })
           .catch(() => {
diff --git a/app/store/chat.ts b/app/store/chat.ts
index 6b403dd6..9fc7ebfd 100644
--- a/app/store/chat.ts
+++ b/app/store/chat.ts
@@ -289,7 +289,6 @@ export const useChatStore = create<ChatStore>()(
         const botMessage: ChatMessage = createMessage({
           role: "assistant",
           streaming: true,
-          id: userMessage.id! + 1,
           model: modelConfig.model,
         });