Service Model by Adrian Tchaikovsky

A humorous tale of robotic murder from the Hugo-nominated author of Elder Race and Children of Time

To fix the world they first must break it further.

Humanity is a dying breed, utterly reliant on artificial labor and service. When a domesticated robot gets a nasty little idea downloaded into their core programming, they murder their owner. The robot then discovers they can also do something else they never did before: run away. After fleeing the household, they enter a wider world they never knew existed, where the age-old hierarchy of humans at the top is disintegrating, and a robot ecosystem devoted to human wellbeing is finding a new purpose.