diff --git a/hermes_cli/models.py b/hermes_cli/models.py
index 4c3b7b475..e1e066851 100644
--- a/hermes_cli/models.py
+++ b/hermes_cli/models.py
@@ -235,13 +235,13 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
     "gemini": [
         "gemini-3.1-pro-preview",
         "gemini-3-pro-preview",
-        "gemini-3-flash-preview",
+        "gemini-3.5-flash",
         "gemini-3.1-flash-lite-preview",
     ],
     "google-gemini-cli": [
         "gemini-3.1-pro-preview",
         "gemini-3-pro-preview",
-        "gemini-3-flash-preview",
+        "gemini-3.5-flash",
     ],
     "zai": [
         "glm-5.1",
diff --git a/plugins/model-providers/gemini/__init__.py b/plugins/model-providers/gemini/__init__.py
index 0812f07ba..f7ae69615 100644
--- a/plugins/model-providers/gemini/__init__.py
+++ b/plugins/model-providers/gemini/__init__.py
@@ -56,7 +56,7 @@ gemini = GeminiProfile(
     env_vars=("GOOGLE_API_KEY", "GEMINI_API_KEY"),
     base_url="https://generativelanguage.googleapis.com/v1beta",
     auth_type="api_key",
-    default_aux_model="gemini-3-flash-preview",
+    default_aux_model="gemini-3.5-flash",
 )
 
 google_gemini_cli = GeminiProfile(