Update app.py

app.py

@@ -32,11 +32,11 @@ class CodeCopilot:
             response = requests.post(
                 "https://developer.blackbox.ai/api/v1/chat/completions",
                 headers=headers,
-                json={
+                body={
                     "messages": [{"role": "user", "content": prompt}],
                     "max_tokens": max_tokens,
                     "temperature": temperature,
-                    "model": "blackbox-code"
+                    "model": "blackboxai/openai/gpt-4"
                 },
                 timeout=30
             )