WIth 68 MPGe, the Clarity Fuel Cell can't claim the highest miles per gallon of gasoline-equivalent rating in the US, since these are all based on official EPA numbers. That title goes to the BMW i3, with 124 MPGe. The hydrogen Clarity should arrive for lease in hydrogen-friendly California before the 2016 calendar runs out. It will be followed by all-electric and plug-in hybrid versions in the coming years.
The hydrogen Clarity will lease for about $500 a month, a bill that will almost certainly include the hydrogen fuel, since that's par for the course with hydrogen vehicles in the US right now.