diff --git a/README.md b/README.md
index 86e335e..cf9b53b 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,8 @@ A Chrome extension helps you group your tabs with AI.
 >
 > [![Telegram](https://img.shields.io/badge/Telegram-2CA5E0?style=for-the-badge&logo=telegram&logoColor=white)](https://t.me/+99v98-XOQY0zZGNl)
 
-Demo Video: 
+Demo Video:
+
 > [![Watch the video](https://img.youtube.com/vi/SjfKiXy3zOc/default.jpg)](https://youtu.be/SjfKiXy3zOc)
 
 ## Roadmap
@@ -32,10 +33,6 @@ Download the latest released `dist.zip` from [the release page](https://github.c
 
 Open Chrome, go to `chrome://extensions/`, turn on `Developer mode` on the top right corner, click `Load unpacked` on the top left corner, select the `dist` folder you just unzipped.
 
-- Fill in the OpenAI API key, add some types and click on the "Save" button.
-- Click on the "Group Tabs" button, your current tabs will be grouped.
-- Your new tab will be grouped automatically.
-
 > You can change the model and API server in the options page.
 
 ## Development
diff --git a/src/options.tsx b/src/options.tsx
index 5236735..5910850 100644
--- a/src/options.tsx
+++ b/src/options.tsx
@@ -4,9 +4,9 @@ import "./options.css";
 import { getStorage, setStorage } from "./utils";
 
 const Options = () => {
-  const [model, setModel] = useState<string | undefined>("gpt-4");
+  const [model, setModel] = useState<string | undefined>("gpt-3.5-turbo");
   const [apiURL, setApiURL] = useState<string | undefined>(
-    "https://api.openai.com"
+    "https://api.openai.com/v1/chat/completions"
   );
 
   useEffect(() => {
@@ -48,7 +48,6 @@ const Options = () => {
             <option value="gpt-4-32k">GPT 4 32k</option>
             <option value="gpt-3.5-turbo-1106">GPT 3.5 turbo 1106</option>
             <option value="gpt-3.5-turbo">GPT 3.5 turbo</option>
-            <option value="gpt-3.5">GPT 3.5</option>
           </select>
         </div>
 
diff --git a/src/services.ts b/src/services.ts
index 1e48011..5b08b45 100644
--- a/src/services.ts
+++ b/src/services.ts
@@ -25,7 +25,7 @@ export async function batchGroupTabs(
     };
   });
 
-  const model = (await getStorage("model")) || "gpt-4";
+  const model = (await getStorage("model")) || "gpt-3.5-turbo";
   const apiURL =
     (await getStorage("apiURL")) ||
     "https://api.openai.com/v1/chat/completions";
@@ -81,7 +81,7 @@ export async function handleOneTab(
   openAIKey: string
 ) {
   try {
-    const model = (await getStorage("model")) || "gpt-4";
+    const model = (await getStorage("model")) || "gpt-3.5-turbo";
     const apiURL =
       (await getStorage("apiURL")) ||
       "https://api.openai.com/v1/chat/completions";