I also thought about the Minds in the Culture novels. That universe has many gradations of artificial brains. Though I wouldn't recommend starting with any of

I also thought about the Minds in the Culture novels. That universe has many gradations of artificial brains. Though I wouldn't recommend starting with any of the stories in the series. Or reading any at all. Find a summary or a Cliff's Notes instead. Iain M Banks has a talent for making great stories tedious.