Anthropic switched to HTML artifacts from Markdown for internal planning, code...

https://direct-wiki.win/index.php/What_Happened_in_the_First_16_Hours_of_that_Anthropic_HTML_Post_on_X%3F

Anthropic switched to HTML artifacts from Markdown for internal planning, code reviews, design systems, and reports because HTML cuts rendering time by 5x and reduces output costs to just $0.08 per document