diff --git a/aiChat/mixins/chatMixinsV2.js b/aiChat/mixins/chatMixinsV2.js
index e2f5054..8431818 100644
--- a/aiChat/mixins/chatMixinsV2.js
+++ b/aiChat/mixins/chatMixinsV2.js
@@ -221,7 +221,7 @@ export const chatMixinsV2 = {
         return
       }
       if (this.loading) return
-      const prompt = params.prompt
+      const prompt = params.prompt.substr(0, 500)
       if (params.init !== 1) {
         _this.chatMessageList.push({
           prompt,