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

https://technivorz.com/is-html-a-good-default-for-design-systems-compared-to-markdown-docs/

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