Complex sentence: He says Ava has only pretended to like Caleb so he would help her escape; this, he says, was the real test all along, and by manipulating Caleb so successfully, Ava has demonstrated true intelligence.
Split into simpler sentences: He says Ava has only pretended to like Caleb so he would help her escape. This, he says, was the real test all along, and by manipulating Caleb so successfully, Ava has demonstrated true intelligence.