Anthropic, the San Francisco-based AI powerhouse, is taking over Manhattan. The company, which has a valuation close to $1 trillion — making it worth more than any other AI startup — announced this week that it's leasing a 16-story office building in Hudson Square. What You Need To Know Anthropic, maker of the Claude chatbot, is leasing a 16-story office building in Hudson Square and doubling its workforce in the city OpenAI, maker of ChatGPT, leased office space in SoHo two years ago Gov.