Will a 5 month old kitten you just got run away if left outdoors?

Yes, a 5-month-old kitten may run away if left outdoors, especially if it's unfamiliar with the environment. Kittens are naturally curious and may be tempted to explore, but they can also be easily frightened and may not know how to find their way back home. It's best to keep them indoors until they are fully acclimated and trained, or to supervise them closely when outside. Providing a safe outdoor space, like a catio, can allow them to enjoy the outdoors without the risk of running away.