diff --git a/tradingagents/default_config.py b/tradingagents/default_config.py
index adcf8181..98b6cbcd 100644
--- a/tradingagents/default_config.py
+++ b/tradingagents/default_config.py
@@ -10,8 +10,8 @@ DEFAULT_CONFIG = {
     ),
     # LLM settings
     "llm_provider": "openai",
-    "deep_think_llm": "o3",
-    "quick_think_llm": "gpt-4.1",
+    "deep_think_llm": "o4-mini",
+    "quick_think_llm": "gpt-4.1-mini",
     "backend_url": "https://api.openai.com/v1",
     # Debate and discussion settings
     "max_debate_rounds": 5,