It depends on what you mean by "speed"! Here's a breakdown:

* Orbital Speed: Jupiter orbits the Sun at an average speed of 13.1 kilometers per second (47,500 km/h or 29,500 mph).

* Rotational Speed: Jupiter spins very fast on its axis. At its equator, it rotates at a speed of 12.6 kilometers per second (45,360 km/h or 28,200 mph). This means a day on Jupiter is only about 10 hours long!

So, Jupiter is fast in both its orbit around the Sun and its rotation on its axis.