Update app.py

app.py

@@ -10,9 +10,9 @@ def explain_text(selected_text):
     if not selected_text or not selected_text.strip():
         return "__NO_SELECTION__"
     try:
-        response = client.chat.completions.create(
-            model="gpt-4o",
-            messages=[
+        response = client.responses.create(
+            model="gpt-4.1-mini",
+            input=[
                 {
                     "role": "system",
                     "content": (
@@ -26,10 +26,9 @@ def explain_text(selected_text):
                     "content": f'Explain this text from a learning resource:\n\n"""\n{selected_text}\n"""',
                 },
             ],
-            temperature=0.7,
-            max_tokens=500,
+            max_output_tokens=400,
         )
-        return response.choices[0].message.content
+        return response.output_text
     except Exception as e:
         return f"__ERROR__: {str(e)}"