diff --git a/ModelConfiguration/anthropic-claude-sonnet-5.json b/ModelConfiguration/anthropic-claude-sonnet-5.json
index 50cef636..a7972c77 100644
--- a/ModelConfiguration/anthropic-claude-sonnet-5.json
+++ b/ModelConfiguration/anthropic-claude-sonnet-5.json
@@ -2,6 +2,7 @@
   "data": {
     "type": "card",
     "attributes": {
+      "reasoningEffort": "medium",
       "cardInfo": {
         "name": "Anthropic: Claude Sonnet 5",
         "summary": null,