diff --git a/providers/openai/responses_language_model.go b/providers/openai/responses_language_model.go
index bf0e342623603679f022ce67a7796c8e06a0dbc5..f65ef87244b814664ae1b42ce6c6d0d6c42e86dc 100644
--- a/providers/openai/responses_language_model.go
+++ b/providers/openai/responses_language_model.go
@@ -641,7 +641,7 @@ func hasVisibleResponsesUserContent(content responses.ResponseInputMessageConten
 func hasVisibleResponsesAssistantContent(items []responses.ResponseInputItemUnionParam, startIdx int) bool {
 	// Check if we added any assistant content parts from this message
 	for i := startIdx; i < len(items); i++ {
-		if items[i].OfMessage != nil || items[i].OfFunctionCall != nil {
+		if items[i].OfMessage != nil || items[i].OfFunctionCall != nil || items[i].OfItemReference != nil {
 			return true
 		}
 	}