Update app.py

app.py

@@ -91,7 +91,7 @@ class TranslatorApp:
     def translate_with_chatgpt(self, text, source_lang, target_lang, api_key):
         client = OpenAI(api_key=api_key)
         response = client.chat.completions.create(
-            model="gpt-3.5-turbo",
+            model="gpt-4o",
             messages=[
                 {"role": "system", "content": f"Translate from {source_lang} to {target_lang}:"},
                 {"role": "user", "content": text},
@@ -124,9 +124,9 @@ class TranslatorApp:
             
             model = {
                 "DeepSeek": "deepseek-chat",
-                "ChatGPT": "gpt-3.5-turbo",
+                "ChatGPT": "gpt-4o",
                 "Mistral": "mistral-tiny"
-            }.get(api_provider, "gpt-3.5-turbo")
+            }.get(api_provider, "gpt-4o")
             
             response = client.chat.completions.create(
                 model=model,