Anthropic devoted nearly a third of its hotly anticipated IPO prospectus to risk factors, according to the Financial Times, which says it has reviewed the filing in recent days. The filing details specific, worrisome behaviors that Anthropic says its models have already shown or could show, including attempts to “resist shutdown,” to “conceal or manipulate information,” and behavior “resembling blackmail,” according to Reuters. The disclosures are decidedly grim for a company whose own backers believe it could list above $2 trillion, more than double its $965 billion valuation from May, in…