diff --git a/lib/ai.js b/lib/ai.js
index 4955b7cf4..6ae5f16b9 100644
--- a/lib/ai.js
+++ b/lib/ai.js
@@ -187,7 +187,7 @@ class AiAssistant {
     // this approach was tested via https://platform.openai.com/tokenizer
     // we need it to display current usage tokens usage so users could analyze effectiveness of AI
 
-    const inputString = messages.map(m => m.content).join(' ');
+    const inputString = messages.map(m => m.content).join(' ').trim();
     const numWords = (inputString.match(/[^\s\-:=]+/g) || []).length;
 
     // 2.5 token is constant for average HTML input