diff --git a/src/ai/ai_client.c b/src/ai/ai_client.c
index 9bc6b176..be902f90 100644
--- a/src/ai/ai_client.c
+++ b/src/ai/ai_client.c
@@ -546,8 +546,9 @@ static gchar*
 _build_json_payload(AISession* session, const gchar* prompt)
 {
 
-    /* OpenAI-compatible format with messages array:
-     * {"model": "...", "messages": [...], "stream": false} */
+    /* OpenAI-compatible Responses API format:
+     * {"model": "...", "input": [...], "stream": false, "store": false}
+     * store:false prevents providers from storing/using requests for training */
     GString* messages_json = g_string_new("");
     GList* curr = session->history;
 
@@ -574,7 +575,7 @@ _build_json_payload(AISession* session, const gchar* prompt)
 
     auto_gchar gchar* escaped_model = ai_json_escape(session->model);
     gchar* json_payload = g_strdup_printf(
-        "{\"model\":\"%s\",\"input\":[%s],\"stream\":false}",
+        "{\"model\":\"%s\",\"input\":[%s],\"stream\":false,\"store\":false}",
         escaped_model, messages_json->str);
 
     g_string_free(messages_json, TRUE);