diff --git a/autogpts/autogpt/autogpt/agents/base.py b/autogpts/autogpt/autogpt/agents/base.py
index 1dd9ac49..db3bec6e 100644
--- a/autogpts/autogpt/autogpt/agents/base.py
+++ b/autogpts/autogpt/autogpt/agents/base.py
@@ -61,7 +61,7 @@ class BaseAgentConfiguration(SystemConfiguration):
     default_cycle_instruction: str = DEFAULT_TRIGGERING_PROMPT
     """The default instruction passed to the AI for a thinking cycle."""
 
-    big_brain: bool = UserConfigurable(default=True)
+    big_brain: bool = UserConfigurable(default=False)
     """
     Whether this agent uses the configured smart LLM (default) to think,
     as opposed to the configured fast LLM. Enabling this disables hybrid mode.