Update app.py

app.py

@@ -125,7 +125,7 @@ def call_gpt5_for_metadata(title: str, short_text: str, top_chunks: List[str]) -
             model=LLM_MODEL,
             messages=[{"role": "user", "content": prompt}],
             temperature=0.0,
-            max_tokens=1000,
+            max_completion_tokens=1000,
         )
     except Exception as e:
         return {"_api_error": True, "error": f"OpenAI API call failed: {e}"}