Update server.js

server.js

@@ -49,7 +49,7 @@ app.post('/generate'/*, generateLimiter*/, async (req, res) => {
     const response = await axios.post('https://api.openai.com/v1/chat/completions', {
       messages: [{'role': 'system', 'content': start}, {'role': 'user', 'content': prompt}],
       max_tokens: 2000,
-      model: "gpt-4-1106-preview",
+      model: "gpt-3.5-turbo",
     }, {
       headers: {
         'Authorization': `Bearer ${openai_key}`,