Apple has unveiled plans to improve its AI models by utilizing a method called 'differential privacy' to analyze user data privately. In response to criticisms regarding its AI performance, especially in notification summaries, the company will generate synthetic data to mimic real user content. Users who opt-in will have their devices poll snippets of this synthetic data to refine model accuracy. Apple aims to enhance various features, including Genmoji and email summaries, by comparing embeddings derived from synthetic messages with actual user data.