Module 1 of 2 in New in iOS 26

Apple Foundation Models

Oct 2 2025, Swift 6.2, iOS 26, macOS 26, iPadOS 26, XCode 26

This module will be an introduction to the new Foundation Models framework in Swift. The module begins with an introduction to the Foundation Models Framework by creating a simple SwiftUI chat-type app. The app will introduce the concept of the LanguageModelSession and how the developer can interact with it. The lesson will then discuss how to persist a session and stream the response along with error handling. It will then cover the potential uses and problems inherent to LLMs and how to handle errors. The last lesson will cover the powerful Generation and external tool abilities that increase the functionality of a app and provide more utility to Foundation Models. By Bill Morefield.

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EXPERIENCE

Intermediate level

EST TIME TO COMPLETE

1 hr, 37 mins

CONTENT

3 lessons

Module outcomes

Create a chat app using Apple Foundation Models.
Recognize trade-offs of running LLMs on-device.
Apply guardrails and safe input practices.
Use guided generation for structured and dynamic data.
Stream responses and integrate external tools.

Covered concepts

Foundation Models basics and on-device constraints.
Prompts, sessions, and response streaming.
Safety, guardrails, and user input handling.
Guided generation with @Generable and PartiallyGenerated types.
Dynamic schemas and external tool integration.

Module content

Introduction to Using Apple Foundation Models Lesson (23 mins)

This lesson introduces Apple Foundation Models, explaining what they are, why they matter in machine learning, and how they can be integrated into different projects and apps.

Start

Introduction • Start Reading · 2 mins

Introduction to Apple Foundation Models Reading · 4 mins

Using Foundation Models Reading · 4 mins

Foundation Models Sessions Reading · 4 mins

Streaming Model Responses Reading · 8 mins

Conclusion Reading · 1 min

Using Apple Foundation Models Lesson (34 mins)

Now that you’ve learned how to use Apple Foundation Models, this section will discuss the abilities and limitations of Apple Foundation Models. It will also discuss ways to tune and adjust the responses produced by the model.

Start

Introduction • Start Reading · 1 min

Abilities & Limitations of Apple Foundation Models Reading · 10 mins

Foundation Model Options & Tuning Video · 12 mins

Handling Full Context Windows Reading · 9 mins

Conclusion Reading · 2 mins

Extending Apple Foundation Models Lesson (40 mins)

This lesson builds on the knowledge you gained in the first two to introduce two very valuable features of Apple Foundation Models: guided generation and external tools. Guided generation allows you to use Foundation Models to generate data adhering to pre-defined data structures or data structures defined at runtime. External tools enable the model to interact with other applications or services, extending the data available to the model beyond training data.

Start

Introduction • Start Reading · 1 min

Introducing Guided Generation Reading · 3 mins

Generating Custom Data Structures Reading · 13 mins

Streaming Guided Generation Data Video · 4 mins

Dynamic Guided Generation Reading · 8 mins

Building Tools for Foundation Models Reading · 9 mins

Conclusion Reading · 1 min

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Apple Foundation Models

Module outcomes

Covered concepts

Module content

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