diff --git a/contributing/samples/bigquery/agent.py b/contributing/samples/bigquery/agent.py
index 56a7367c..2389b25f 100644
--- a/contributing/samples/bigquery/agent.py
+++ b/contributing/samples/bigquery/agent.py
@@ -71,7 +71,7 @@ bigquery_toolset = BigQueryToolset(
 # The variable name `root_agent` determines what your root agent is for the
 # debug CLI
 root_agent = LlmAgent(
-    model="gemini-2.0-flash",
+    model="gemini-2.5-flash",
     name=BIGQUERY_AGENT_NAME,
     description=(
         "Agent to answer questions about BigQuery data and models and execute"