Human: I'm a little confused about the difference between an IRA and a 401k. Can you help me out? Assistant: 
An IRA is a retirement savings account that allows individuals to save for retirement on a tax-deferred basis. It is different from a 401(k) in that it can be funded with after-tax dollars, while a 401(k) is funded with pre-tax dollars. Additionally, IRAs offer more flexibility than 401(k)s as they allow for investments beyond just stocks and bonds.