diff --git a/components/ai_chat/core/browser/engine/oai_api_client.cc b/components/ai_chat/core/browser/engine/oai_api_client.cc
index 36979b79e210..46619aaa290e 100644
--- a/components/ai_chat/core/browser/engine/oai_api_client.cc
+++ b/components/ai_chat/core/browser/engine/oai_api_client.cc
@@ -150,7 +150,11 @@ void OAIAPIClient::OnQueryCompleted(GenerationCompletedCallback callback,
           DVLOG(2) << "No message dict found in response.";
           return;
         }
-        completion = *message->FindString("content");
+
+        const std::string* content = message->FindString("content");
+        if (content) {
+          completion = *content;
+        }
       }
     }