Apple’s executives have been taking questions, hosting seminars, seemingly working around the clock to stress one very important thing: Apple is not using a white label version of Google Gemini to make Siri AI happen. They just pooled resources to get there. 

The new Siri AI is faster, more accurate, offers powerful contextual capabilities and shows how Apple has leap-frogged into a good peer position in an AI race critics felt it had already lost. Its market scale — even without the EU — is huge. For most consumers, Apple Intelligence and Siri will continue to be their primary/first engagement with artificial intelligence on a device.

Getting there took a lot of work, and Apple needed Google to get it done. Though there is still some confusion about what that means, Apple’s software chief tried to explain it this week. “We use none of the models that Google deploys to their customers, nor do we use the infrastructure and means by which they employ models to their customers,” Craig Federighi said in a presentation at WWDC.

Apple is not even using Google Search as the foundation of its system, he said. “This is the amount of Google Assistant we use,” Federighi said, pointing at an empty chart. “Nothing.”

Apple not Gemini, Siri AI is not Google’s

What makes this hard to understand is that we all know Apple partnered with Google to build Siri AI; back in January, we were told the next generation of Apple Foundation Models would be based on Gemini models and cloud technology. So, how can we have moved from partnership hero to usage zero?

The answer is, we didn’t. What happened is that Apple built its new Apple Frontier Models (AFMs) (the AI inside Siri AI) by training them using proprietary Apple data and reinforcement learning and then refined those models using “outputs from Google’s Gemini Frontier models.”

In other words, Apple used Google Gemini to help improve its own models, which means the models themselves, the AI in Siri AI, are Apple’s — but they were trained with help from Gemini. They are not white label iterations of those Google models. 

Apple also hit a second snag. Its very best model (AFM 3 Cloud Pro) requires more processor power to run than Apple could deliver using its own cloud-hosted Private Cloud Compute servers. Now, we know Apple doesn’t like using other people’s stuff. But it’s a realistic company that understands it sometimes must, and just as it uses AWS to support some of its services, it moved to adopt Google cloud services and Nvidia processors to drive the most demanding requests.

A question of trust

Apple also developed a technological solution that means it can claim the interaction remains just as private as if it were run on your device. Apple has made it possible for independent security experts to confirm this and says it is the only company that can deploy software on those servers, with strong security to ensure your device only interacts with those servers when you want it to. So far, no one has broken this protection. 

I came across an interesting report in which Tekonyx Founder and Chief Research Officer Sid Nag explained the significance of Apple finding a way to expand its Private cloud Compute infrastructure beyond its own data centers.

“Apple is effectively arguing that trust in AI systems should come from cryptographic and architectural guarantees rather than trust in the cloud provider itself,” he told Fierce. Where enterprises have faced a choice between access to powerful AI or privacy, Apple has introduced a new solution he called “portable trust.” This could conceivably become a new IaaS offering from the companies involved over time.

Working together for the benefit of all

So, while Apple’s models were built with Google’s help, and while its most advanced models run with support from Google and Nvidia, the models are Apple’s alone. 

It’s good for Google, of course. Apple is paying for this use, which helps the search giant claw back some of the value of its massive, muti-billion-dollar AI infrastructure investment. It’s not clear how much Apple is paying; earlier this year, the $1 billion figure was bandied around. But Apple’s decision to tie usage to iCloud subscriptions in some hitherto undisclosed way hints that the deal may also see some token-based usage charges on top of the basic Apple fee. I’ve not come across any details, but that’s what I surmise based on the size of Apple’s ecosystem and the growing realization of how quickly users can consume AI capacity.

What AI models is Apple running?

AFM 3 Cloud Pro is one of five Apple Frontier Models driving Siri AI.  Here’s how Apple describes those five models:

On-device models

• AFM 3 Core, the next generation of Apple’s 3-billion-parameter dense model. You’ll use this for basic text generation, summaries, conversational replies, all the standard uses. It can also handle indexing, search, App Intents, basic dictation and contextual awareness.
• AFM 3 Core Advanced, the most powerful on-device model. This is what makes Siri’s voice match mood or context, does all the high-accuracy dictation, and can process various data to handle tasks across different apps. It’s the AI driving your more involved Siri conversations. 

AFM Core Advanced is impressive in its own right, because Apple has managed to cram a 20-billion-parameter model onto a smartphone. It has done this by using a sparse architecture, which means it activates just 1 to 4 billion parameters at a time depending on the request. It is, however, only available to Apple’s most powerful systems — iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, M4 or later iPad, M3 or later Mac with 12GB+ memory.

Server-based models

• AFM 3 Cloud, which Apple calls its server-side workhorse, optimized for speed, efficiency, and performance.
• ADM 3 Cloud (Image), for image generation and editing, which unlocks advanced photo-editing tools, the all-new Image Playground, and more.
• AFM 3 Cloud Pro, the most capable server-based model, which powers the most demanding use cases, like agentic tool use and complex reasoning.

All five were built using the same common foundation, which was then specialized to reflect the proposed use of that model. It’s interesting to look at the human evaluation tests Apple ran to test how well these models performed; they demonstrate impressive improvement on the company’s original models, effectively justifying the decision to work with Gemini.