diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index 1f7ce77c..184795c0 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -74,7 +74,7 @@ class Settings(BaseSettings):
 
     # AI Flow Builder
     ANTHROPIC_API_KEY: Optional[str] = None
-    AI_MODEL: str = "claude-haiku-4-5"
+    AI_MODEL: str = "claude-haiku-4-5-20251001"
     AI_CONVERSATION_TTL_HOURS: int = 24
     AI_MAX_CALLS_PER_FLOW: int = 10
     AI_REQUEST_TIMEOUT_SECONDS: int = 45