diff --git a/tradingagents/default_config.py b/tradingagents/default_config.py
index 1f40a2a2..3c865678 100644
--- a/tradingagents/default_config.py
+++ b/tradingagents/default_config.py
@@ -9,10 +9,10 @@ DEFAULT_CONFIG = {
         "dataflows/data_cache",
     ),
     # LLM settings
-    "llm_provider": "openai",
-    "deep_think_llm": "o4-mini",
-    "quick_think_llm": "gpt-4o-mini",
-    "backend_url": "https://api.openai.com/v1",
+    "llm_provider": "google",
+    "deep_think_llm": "gemini-2.5-pro",
+    "quick_think_llm": "gemini-2.5-flash",
+    "backend_url": "https://generativelanguage.googleapis.com/v1",
     # Debate and discussion settings
     "max_debate_rounds": 1,
     "max_risk_discuss_rounds": 1,