diff --git a/config/config2.yaml b/config/config2.yaml
index 2c4ca636f..84b201c4c 100644
--- a/config/config2.yaml
+++ b/config/config2.yaml
@@ -1,3 +1,6 @@
+# Check https://github.com/geekan/MetaGPT/blob/main/config/config2.example.yaml for full configuration example.
+# It reflects https://github.com/geekan/MetaGPT/blob/main/metagpt/config2.py
 llm:
+  api_type: "openai"  # or azure / ollama / open_llm etc. Check LLMType for more options
   api_key: "YOUR_API_KEY"
   model: "gpt-4-turbo-preview"  # or gpt-3.5-turbo-1106 / gpt-4-1106-preview
\ No newline at end of file