Anthropic switched to HTML artifacts because they cut output costs by 8 cents...

https://www.bookmarking-keys.win/anthropic-switched-to-html-artifacts-over-markdown-for-internal-planning-code

Anthropic switched to HTML artifacts because they cut output costs by 8 cents per document and handle 4.4 million views smoothly every month. HTML lets teams build richer, interactive planning docs, clearer code reviews, and flexible design systems