As the AI arms race intensifies, tech giants continue scaling their models to ever-larger sizes, leaning heavily on server infrastructure and cloud dependencies. Companies like Meta are investing in other AI companies to compete better with Google, Microsoft, and others.

Apple, however, seems to be taking the road less travelled. 

Its latest research on foundation models, ‘Updates to Apple’s On-Device and Server Foundation Language Models’, signals a deliberate move towards compact, efficient, and private-by-default AI, designed not to impress with scale, but to function tightly within devices already in people’s hands.

Apple is betting on AI being ambient, responsive, and respectful of privacy. This comes right along with iOS 26, which was announced at the World Wide Developers Conference (WWDC) 2025 on Monday. Its on-device model, running with just 3 billion parameters, aims to deliver intelligent assistance without constant permission-seeking from the cloud.

Small Model, Smart Design

According to the research insights, a redesigned architecture lies at the heart of Apple’s AI stack. It is strategically sliced into blocks that share caches to save memory and cut latency. “This reduced the KV cache memory usage by 37.5% and significantly improved the time-to-first-token,” the blog noted. 

Meanwhile, the server model relies on a parallel-track mixture-of-experts setup. Each ‘track’ operates semi-independently, trimming synchronisation overheads by up to 87.5% in some configurations. It also improves token latency, an important factor when users expect real-time responses from Siri or system-level features.

“The models have improved tool-use and reasoning capabilities, understand image and text inputs, are faster and more efficient, and are designed to support 15 languages,” Apple stated in the blog post.

The company has even included a vision encoder with a custom Register-Window mechanism for richer local-global image features.

Compression also plays a central role. The on-device model is quantised down to 2 bits per weight using a training-aware method. Remarkably, this yields only a minor drop, just 4.6%, in complex reasoning benchmarks. In some tasks, including general knowledge recall, the compressed model even performs slightly better. These gains make it viable for iPhones and iPads without hardware upgrades or server dependence.

Training Without Looking And Still Performing

Apple’s training approach diverges sharply from rivals. While most foundation models consume vast quantities of internet data, Apple stresses that no private user data or device interactions are included in its training. The data pipeline is limited to licensed sources, curated public datasets, and Applebot-powered web crawls that adhere to opt-out mechanisms via robots.txt.

The company stated in the blog post, “We protect our users’ privacy with powerful on-device processing and groundbreaking infrastructure like Private Cloud Compute. We do not use our users’ private personal data or user interactions when training our foundation models.”

The model’s performance makes a strong case for this restraint. Apple’s compact AI model outperformed Qwen-2.5-3B in 33.5% of tests with a 53.5% tie rate, surpassed Qwen-3-4B in 20.5% of tests with a 54.6% tie rate, and bested Gemma-3-4B in 21.3% of tests with a 52.3% tie rate.

The server model fares similarly, outperforming Llama-4-Scout in most tests and surpassing Qwen-2.5-VL while consuming less than half the inference compute.

Multimodal capabilities are also built in. Vision encoders trained on over 10 billion image-text pairs, including synthetic captions, allow Apple’s models to process images, diagrams, and screenshots. The models are designed to recognise app UI elements, document layouts, and tabular data, bridging the gap between natural language input and visual interface understanding.

Apple Ups the Ante

Apple’s strategic move to prioritise compact AI is not merely a technical detail, but rather a significant repositioning for the company. While other companies race toward general-purpose AI and autonomous agents, Apple is focused on assistive, integrated features tightly coupled with its devices and OS.

Whether this vision scales to more demanding applications remains to be seen. But for the near term, Apple has placed its bet on controlled, local intelligence. Maintaining its focus on privacy, Apple opts for a strategy that avoids the competitive push for ever-increasing computing power, instead prioritising compact AI with innovative concepts.

If this approach catches on, it may prompt a broader rethink across the industry, not just about how large a model should be but also about where it should live, how it should behave, and who it should serve.

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