Update app.py

app.py

@@ -1140,7 +1140,7 @@ async def process_text_chat(message: str, web_search_enabled: bool, target_langu
         
         # Call GPT-4o-mini
         response = await client.chat.completions.create(
-            model="gpt-4o-mini",
+            model="gpt-4.1-mini",
             messages=messages,
             temperature=0.7,
             max_tokens=2000
@@ -1156,7 +1156,7 @@ async def process_text_chat(message: str, web_search_enabled: bool, target_langu
                 # Try again with stronger prompt
                 messages[-1] = {"role": "user", "content": f"ONLY {SUPPORTED_LANGUAGES.get(target_language, target_language)}, NO KOREAN: {message}"}
                 retry_response = await client.chat.completions.create(
-                    model="gpt-4o-mini",
+                    model="gpt-4.1-mini",
                     messages=messages,
                     temperature=0.3,
                     max_tokens=2000