[Update] Default LLM (#3587)

tests/test_proxy.py

@@ -68,14 +68,14 @@ def test_completions_create(mock_memory_client, mock_litellm):
     mock_litellm.completion.return_value = {"choices": [{"message": {"content": "I'm doing well, thank you!"}}]}
     mock_litellm.supports_function_calling.return_value = True
 
-    response = completions.create(model="gpt-4o-mini", messages=messages, user_id="test_user", temperature=0.7)
+    response = completions.create(model="gpt-4.1-nano-2025-04-14", messages=messages, user_id="test_user", temperature=0.7)
 
     mock_memory_client.add.assert_called_once()
     mock_memory_client.search.assert_called_once()
 
     mock_litellm.completion.assert_called_once()
     call_args = mock_litellm.completion.call_args[1]
-    assert call_args["model"] == "gpt-4o-mini"
+    assert call_args["model"] == "gpt-4.1-nano-2025-04-14"
     assert len(call_args["messages"]) == 2
     assert call_args["temperature"] == 0.7
 
@@ -93,7 +93,7 @@ def test_completions_create_with_system_message(mock_memory_client, mock_litellm
     mock_litellm.completion.return_value = {"choices": [{"message": {"content": "I'm doing well, thank you!"}}]}
     mock_litellm.supports_function_calling.return_value = True
 
-    completions.create(model="gpt-4o-mini", messages=messages, user_id="test_user")
+    completions.create(model="gpt-4.1-nano-2025-04-14", messages=messages, user_id="test_user")
 
     call_args = mock_litellm.completion.call_args[1]
     assert call_args["messages"][0]["role"] == "system"