Update app.py

app.py

@@ -44,9 +44,9 @@ def chat():
             "audio_url": None
         })
 
-    # call OpenAI ChatCompletion with a cost-efficient model
+    # call OpenAI using the new 1.x interface
     try:
-        resp = openai.ChatCompletion.create(
+        completion = openai.chat.completions.create(
             model="gpt-3.5-turbo",
             messages=[
                 {"role": "system", "content": SYSTEM_PROMPT},
@@ -55,7 +55,7 @@ def chat():
             temperature=0.7,
             max_tokens=250,
         )
-        reply = resp.choices[0].message.content.strip()
+        reply = completion.choices[0].message.content.strip()
     except Exception as e:
         print(f"❌ OpenAI API error: {e}", file=sys.stderr)
         return jsonify({"error": "Model error", "details": str(e)}), 500