Artificial intelligence (AI) giant Anthropic is looking for a roughly US$1.3-trillion valuation in an initial public offering (IPO) despite new questions about the massive amounts of money flowing into the sector. The company behind the Claude chatbot said in a regulatory filing on Tuesday that it will sell 825 million shares priced between US$70 and US$78 a share. That would give Anthropic the ability to raise more than US$61 billion, if the IPO is priced at the midpoint. The San Francisco company is anticipated to make its Wall Street debut this month.