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

https://smart-wiki.win/index.php/How_Do_I_Reproduce_the_Token_Counting_Test_Using_the_Official_Anthropic_Tokenizer%3F

Anthropic switched to HTML artifacts for internal planning, code reviews, design systems, and reports because HTML cuts output costs by 92%, dropping from $1 to just $0.08 per file