diff --git a/agent/auxiliary_client.py b/agent/auxiliary_client.py
index e02fa1911f7..a7fcd311f11 100644
--- a/agent/auxiliary_client.py
+++ b/agent/auxiliary_client.py
@@ -424,7 +424,7 @@ NOUS_EXTRA_BODY = _nous_extra_body()
 auxiliary_is_nous: bool = False
 
 # Default auxiliary models per provider
-_OPENROUTER_MODEL = "google/gemini-2.5-flash"
+_OPENROUTER_MODEL = "google/gemini-3-flash-preview"
 _NOUS_MODEL = "google/gemini-3-flash-preview"
 _NOUS_DEFAULT_BASE_URL = "https://inference-api.nousresearch.com/v1"
 _ANTHROPIC_DEFAULT_BASE_URL = "https://api.anthropic.com"