Anthropic switched to HTML artifacts for internal planning, code reviews,...

https://page-wiki.win/index.php/Why_do_HTML_Artifacts_Make_It_Easier_to_Build_Interactive_Plans_Than_Markdown%3F

Anthropic switched to HTML artifacts for internal planning, code reviews, design systems, and reports because it slashes output costs to just $0.08 per document. HTML also loads 5 times faster than Markdown, making collaboration smoother for their team