diff --git a/mcp_server.py b/mcp_server.py
index 773d405d..55f7b9f5 100644
--- a/mcp_server.py
+++ b/mcp_server.py
@@ -2460,7 +2460,7 @@ MEETING_ROLES = {
         "nickname": "西蒙斯",
         "role_type": "quant",
         "avatar": "/images/agent/simons.png",
-        "model": "deepseek",
+        "model": "kimi-k2-thinking",
         "color": "#3B82F6",
         "description": "中性立场，使用量化工具分析技术指标",
         "tools": ROLE_TOOLS["simons"],