You can literally sign up for D-Wave Leap and run problems on a quantum computer immediately. It's not gate-model, but it's a real quantum annealer that functions and can compute useful things.
Quantum annealers are not quantum computers. They are not more powerful than classical computers. You either need the "gate model" or the equivalent "adiabatic quantum computing model" to achieve something infeasible on classical computers.
It is a common misconception to think that adiabatic quantum computing (which is equivalent to the gate model) and quantum annealing is the same thing. It is not, and quantum annealing is mostly a buzzword that D-Wave use to sell their devices.
