diff --git a/metagpt/llm.py b/metagpt/llm.py
index c6755919d..b8aefec61 100644
--- a/metagpt/llm.py
+++ b/metagpt/llm.py
@@ -1,22 +1,17 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """
-@Time    : 2023/6/1 12:41
+@Time    : 2023/5/11 14:45
 @Author  : alexanderwu
-@File    : logs.py
+@File    : llm.py
 """
 
-import sys
+from metagpt.provider.anthropic_api import Claude2 as Claude
+from metagpt.provider.openai_api import OpenAIGPTAPI as LLM
 
-from loguru import logger as _logger
+DEFAULT_LLM = LLM()
+CLAUDE_LLM = Claude()
 
-from metagpt.const import PROJECT_ROOT
-
-def define_log_level(print_level="INFO", logfile_level="DEBUG"):
-    """Adjust log level to above the specified level."""
-    _logger.remove()
-    _logger.add(sys.stderr, level=print_level)
-    _logger.add(PROJECT_ROOT / 'logs/log.txt', level=logfile_level)
-    return _logger
-
-logger = define_log_level()
+async def ai_func(prompt):
+    """Use LLM for Q&A."""
+    return await DEFAULT_LLM.aask(prompt)