diff --git a/examples/monitoring/grafana.json b/examples/monitoring/grafana.json
index 68d001a64..5fb7fbe5c 100644
--- a/examples/monitoring/grafana.json
+++ b/examples/monitoring/grafana.json
@@ -375,7 +375,7 @@
           },
           "disableTextWrap": false,
           "editorMode": "code",
-          "expr": "histogram_quantile(0.5, sum by (le) (rate(sglang:time_to_first_token_seconds_bucket[$__rate_interval])))\r\n",
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(sglang:time_to_first_token_seconds_bucket[$__rate_interval])))\r\n",
           "fullMetaSearch": false,
           "hide": false,
           "includeNullMetadata": true,