Apple PROSE is a new AI technique introduced by Apple researchers that enables AI to learn and mimic a user’s personal writing style by analyzing past emails, notes, and documents. The goal is to make AI-generated text—such as emails, messages, or notes—sound more natural, personalized, and consistent with the user’s unique tone, vocabulary, and sentence structure.
How PROSE Works
- PROSE (Preference Reasoning by Observing and Synthesising Examples) builds a detailed writing profile by studying a user’s historical writing samples.
- It iteratively refines AI-generated drafts by comparing them against the user’s real writing, adjusting tone and style until the output closely matches the user’s natural voice.
- The system uses a new benchmark called PLUME to measure how well it captures and reproduces individual writing styles.
- PROSE can adapt to different writing contexts, whether formal, casual, emoji-rich, or precise.
Integration and Impact
- Apple plans to integrate PROSE into apps like Mail and Notes, allowing AI-assisted writing to feel more authentic and personalized.
- When combined with foundation models like GPT-4o, PROSE has shown significant improvements in personalization accuracy—outperforming previous personalization methods by a notable margin.
- This approach aligns with Apple’s broader AI strategy focused on privacy, on-device intelligence, and delivering AI experiences that feel personal and user-centric.
Apple PROSE represents a shift from generic AI writing toward truly personalized AI assistance that writes “like you.” By learning from your own writing style, it promises to make AI-generated text more natural, consistent, and reflective of individual personality—enhancing everyday communication while maintaining Apple’s strong privacy standards.