Apple Watch Series 12 and Ultra 4 Set to Debut Major Chip Upgrade Ahead of AI Push

As Apple prepares for its highly anticipated product launch next month, rumors are coalescing around a significant hardware overhaul for the company’s wearable lineup. Both the Apple Watch Series 12 and Ultra 4 are expected to arrive with a brand-new, high-performance S-class chip, a move that experts say is long overdue and perfectly timed for the rollout of advanced artificial intelligence features.

A Rare Performance Leap

For years, the Apple Watch has been an outlier in Apple’s hardware ecosystem. While iPhones and Macs receive significant silicon performance gains annually, Apple Watch chip upgrades have historically been incremental. In fact, many “new” models released in recent years retained the same CPU capabilities as their predecessors. Last year’s cycle was particularly notable for this lack of momentum, as the Apple Watch Ultra 3 and Series 11 utilized the identical S10 silicon found in the previous generation.

However, industry insiders—including Bloomberg’s Mark Gurman—have indicated that this year’s release will break the cycle. The upcoming models are expected to feature a "long-awaited bump in chips and speed," marking the most substantial performance leap since the introduction of the S9 chip in 2023.

The Catalyst: watchOS 27 and Siri AI

The timing of this hardware boost is no coincidence. With the release of watchOS 27 just weeks away, Apple is placing a heavy emphasis on its new, revamped Siri. Unlike previous iterations of the voice assistant, the version arriving with watchOS 27 is the same robust AI powerhouse currently fueling the iPhone, iPad, and Mac.

This transition to a more sophisticated AI model has already had consequences for older hardware, as the new software has dropped support for several legacy Apple Watch models. Early feedback from the watchOS 27 developer beta suggests that the current Siri implementation can feel sluggish on older hardware, likely because existing chips were not architected to handle the resource-heavy demands of modern generative AI.

Entering the AI Era

The new S-series chip (likely to be branded as the S11 or S12) is expected to be the first Apple Watch processor specifically optimized for the AI era. By providing the necessary compute headroom, this upgrade should resolve the responsiveness issues observed in the beta, ensuring that Siri on the wrist can perform with the same fluidity as it does on larger Apple devices.

As Apple continues to integrate its AI services deeper into the user experience, this year’s shift toward high-performance silicon signals a new direction for the Apple Watch—transforming it from a companion device into a more capable, intelligent assistant.

With the official launch event just around the corner, tech enthusiasts are eager to see if the combination of new hardware and watchOS 27 finally delivers the snappy performance users have been craving.