Goldman Sachs' New York headquarters.Photo by Michael M. Santiago/Getty ImagesGoldman Sachs CEO David Solomon spoke at the Cisco AI Summit this week.He said AI was changing processes like drafting IPO filings and analyst research.Efficiency gains rely on the execution of employees changing their processes.One of Wall Street's top bosses just gave a revealing look into how AI is changing the lives of bankers and analysts in its investment bank.Ten years ago, when Goldman wanted to win the business of a company going public, it would appoint a team of about half a dozen people who over two weeks would draft a prospectus known as an S-1, a significant regulatory document that details the business, financials, and risk factors, among other things.