diff --git a/contributing/samples/core_generate_content_config_config/root_agent.yaml b/contributing/samples/core_generate_content_config_config/root_agent.yaml
index 6c108539..c5ae3a21 100644
--- a/contributing/samples/core_generate_content_config_config/root_agent.yaml
+++ b/contributing/samples/core_generate_content_config_config/root_agent.yaml
@@ -1,6 +1,6 @@
 # yaml-language-server: $schema=https://raw.githubusercontent.com/google/adk-python/refs/heads/main/src/google/adk/agents/config_schemas/AgentConfig.json
 name: search_agent
-model: gemini-2.0-flash
+model: gemini-2.5-flash
 description: 'an agent whose job it is to perform Google search queries and answer questions about the results.'
 instruction: You are an agent whose job is to perform Google search queries and answer questions about the results.
 tools:
@@ -8,3 +8,5 @@ tools:
 generate_content_config:
   temperature: 0.1
   max_output_tokens: 2000
+  thinking_config:
+    include_thoughts: true