Update app.py

app.py

@@ -3118,7 +3118,7 @@ def generate_stitched_story(story: List[dict], style: str, detail_level: str, th
 
         # Generate English version with minimal enhancements
         response = client.chat.completions.create(
-            model="gpt-4",
+            model="gpt-4o-mini",
             messages=[
                 {
                     "role": "system",
@@ -3151,7 +3151,7 @@ def generate_stitched_story(story: List[dict], style: str, detail_level: str, th
         """
 
         translation_response = client.chat.completions.create(
-            model="gpt-4",
+            model="gpt-4o-mini",
             messages=[
                 {
                     "role": "system",