Anthropic switched to HTML artifacts because they cut costs and speed up...

https://romeo-wiki.win/index.php/What%E2%80%99s_the_Best_Format_for_Internal_Reports_in_Claude:_HTML_or_Markdown%3F

Anthropic switched to HTML artifacts because they cut costs and speed up workflows. Their reports get over 4.4 million views, and using HTML slashes output costs to just $0.08 per document