iOS 27 Beta: Customize Siri's Voice Pace and Expressivity

Apple is giving beta testers of its latest operating system, iOS 27, an early look at enhanced capabilities for its AI assistant, Siri. Version 3 of the iOS 27 developer beta, released on July 6, 2026, enables new voice customization options that allow users to adjust Siri's speaking "Pace" and "Expressivity." These features, previously marked as "Coming soon," are a significant step in Apple's ongoing project to imbue Siri with more natural-sounding and personalized interactions, particularly as the assistant undergoes a rebuild centered around generative AI technology.

The introduction of these voice controls reflects a growing trend among AI assistants to offer users greater control over their AI's vocal presentation. Competitors like OpenAI's ChatGPT have already implemented similar features. In December 2025, ChatGPT rolled out options allowing users to modify the "warmth and enthusiasm" of its voice, alongside the ability to configure base style and tone. These settings influence not only how ChatGPT speaks but also how it delivers information, offering modes such as friendly, professional, candid, or quirky. Apple's approach in iOS 27 aims to bridge this gap, making Siri a more relatable and engaging digital companion.

Evolving Siri's Voice and Interaction

First unveiled at Apple's Worldwide Developers Conference (WWDC 26) in June, the voice customization for Siri goes beyond the traditional choice between male and female-sounding voices. With the current beta, testers can explore a variety of voices with different accents. More importantly, they can now utilize sliders to precisely control the speed at which Siri speaks and the degree of human-like emotion conveyed through its voice. To aid users in making these adjustments, Siri demonstrates the effects by reciting common phrases like "You have one new message," allowing testers to audibly gauge the impact of their selected pace and expressivity settings.

This evolution is part of a larger strategy to integrate a more sophisticated AI assistant deeply within iOS 27. The updated Siri is designed to be accessible through multiple interaction methods. Users can initiate conversations by speaking directly, swiping down from the Dynamic Island, typing commands, pressing the side button, or even by launching a dedicated, standalone Siri app. This multi-modal approach seeks to accommodate various user preferences and contexts, making Siri more accessible and versatile than ever before.

The ability to customize Siri's voice characteristics is a critical component in fostering a stronger user connection with AI technology. As AI becomes more pervasive in daily life, the perceived personality and responsiveness of virtual assistants play a crucial role in user adoption and satisfaction. By allowing users to tailor Siri's vocal output to their liking, Apple is not just enhancing functionality but also building a more intuitive and personal user experience. This focus on natural language interaction and user-centric design is becoming a benchmark for advanced AI assistants in the competitive tech landscape.