From 490e1c435e6a29a37021f349cf7aea655c04cdf2 Mon Sep 17 00:00:00 2001
From: PRABHU KIRAN VANDRANKI <72809214+VANDRANKI@users.noreply.github.com>
Date: Tue, 5 May 2026 14:34:42 -0400
Subject: [PATCH] fix(vertex): pass system prompt to
 partner_models_handler.count_tokens()

---
 litellm/llms/vertex_ai/common_utils.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/litellm/llms/vertex_ai/common_utils.py b/litellm/llms/vertex_ai/common_utils.py
index 43e77f4fb75..5159c874db9 100644
--- a/litellm/llms/vertex_ai/common_utils.py
+++ b/litellm/llms/vertex_ai/common_utils.py
@@ -1082,6 +1082,7 @@ class VertexAITokenCounter(BaseTokenCounter):
                 vertex_project=vertex_project,
                 vertex_location=vertex_location,
                 vertex_credentials=vertex_credentials,
+                system=system,
             )
 
             if result is not None: