Update app.py

app.py

@@ -58,10 +58,13 @@ TONES = {
 def rewrite_one(text: str, tone_name: str) -> str:
     """Call the model once for a single tone."""
     instruction = TONES[tone_name]
+
     try:
-        resp = client.chat.completions.create(
+        resp = client.responses.create(
             model=MODEL,
-            messages=[
+            reasoning={"effort": "minimal"},
+            max_output_tokens=700,
+            input=[
                 {
                     "role": "system",
                     "content": (
@@ -70,16 +73,18 @@ def rewrite_one(text: str, tone_name: str) -> str:
                         "no quotes around the result."
                     ),
                 },
-                {"role": "user", "content": text},
+                {
+                    "role": "user",
+                    "content": text,
+                },
             ],
-            max_completion_tokens=2000,
-            reasoning_effort="minimal",
         )
-        return resp.choices[0].message.content.strip()
+
+        return resp.output_text.strip()
+
     except Exception as e:
         return f"⚠️ Error calling the model: {e}"
 
-
 def shift_all(text: str, selected_tones: list[str]) -> str:
     """Run the rewrite for each selected tone, return one Markdown blob."""
     if not selected_tones:
@@ -100,7 +105,7 @@ with gr.Blocks(title="Tone Shifter", theme=gr.themes.Soft()) as demo:
     gr.Markdown(
         "# 🎭 Tone Shifter\n"
         "Paste any text, pick the vibes, watch it transform. "
-        "*Powered by GPT-4o-mini, hosted on Hugging Face Spaces.*"
+        "*Powered by GPT-5 nano, hosted on Hugging Face Spaces.*"
     )
 
     with gr.Row():