diff --git a/fastchat/serve/api_provider.py b/fastchat/serve/api_provider.py
index 9cdff1f08..11838b849 100644
--- a/fastchat/serve/api_provider.py
+++ b/fastchat/serve/api_provider.py
@@ -1308,7 +1308,7 @@ def jab_api_stream_iter(
         pos = 0
         while pos < len(text):
             # simulate token streaming
-            pos += 3
+            pos += 5
             time.sleep(0.001)
             data = {
                 "text": text[:pos],