Apple will analyse user data directly on devices to enhance its AI capabilities while maintaining user privacy. The move aims to narrow the gap with rivals like OpenAI and Alphabet.

Until now, Apple has relied on synthetic data to train its AI models, but this approach often lacked real-world accuracy. The new method compares synthetic inputs with actual emails stored locally on iPhones, iPads, and Macs to better align AI performance with real usage—without collecting personal data.

This shift is expected to improve Apple Intelligence features such as Writing Tools, notification summaries, and message recaps. It will roll out in beta versions of iOS and iPadOS 18.5 and macOS 15.5 for users who opt into device analytics.

Apple is also upgrading other AI tools like Genmoji, Image Playground, and Memories using privacy-focused techniques including differential privacy and synthetic data generation.

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