What’s next for Apple’s Siri in 2025? Many iPhone users are searching for answers as Apple works to transform Siri using advanced AI and large language models (LLMs). Recent reports reveal Apple is testing powerful models, including a massive 150 billion parameter version, designed to rival ChatGPT’s capabilities. If you’re wondering when Siri’s long-awaited AI upgrade will launch, here’s the latest scoop straight from internal sources and expert analysis.

Apple is actively developing a range of LLM models with sizes from 3 billion to 150 billion parameters. The largest model, much like OpenAI’s ChatGPT, leverages cloud-based infrastructure, enabling nuanced conversation, enhanced reasoning, and complex data processing. These models far surpass Siri’s current on-device architecture, which struggles with contextual understanding and real-time adaptability. Apple insiders suggest that internal benchmarking tools like “Playground” show promising results, with performance “approaching the quality of recent ChatGPT rollouts.” However, challenges remain, including the tendency of the models to “hallucinate” or generate inaccurate responses.

While Apple’s Siri upgrade project moves forward, the company is also testing an internal chatbot model called Knowledge. This AI tool, reportedly led by Robby Walker, can access the internet to gather real-time data and synthesize complex information, potentially expanding Siri’s functionality for search and content delivery. However, Knowledge faces similar challenges to the Siri overhaul—delays stemming from internal disagreements over AI’s role and performance reliability.

In Zurich, Apple’s AI research teams are building a new software architecture to replace Siri’s aging hybrid system, which has grown inefficient and fragmented over the years. This new framework aims to integrate cutting-edge conversational AI into Siri’s core, improving voice recognition, contextual understanding, and real-time decision-making. Yet, executives remain divided over how far and how fast Apple should push these changes.

Despite the excitement, Apple is not expected to announce official launch dates for these AI innovations at this year’s WWDC 2025. Industry insiders note Apple’s cautious approach after last year’s criticism for prematurely announcing Apple Intelligence features that are still not available. Meanwhile, competition heats up: Google’s Gemini is set to join iOS 26 as a powerful alternative to ChatGPT, and Apple is reportedly in talks with Perplexity AI to add another option for both Siri and Safari search.

For users and businesses, the future of Siri—and Apple’s broader AI strategy—remains in flux. High-stakes decisions about integrating cloud-based LLMs, internet-enabled chatbots, and new software architectures will shape not only Siri’s performance but also the broader landscape of voice assistants and digital search. Expect updates in the coming months as Apple fine-tunes its models and solidifies partnerships that could reshape how millions of users interact with AI on iPhones, iPads, and Macs.