Foundation Models

Prompt Apple's on-device and Private Cloud Compute models from Swift, in a few lines of code.

Read the documentation WWDC sessions

Introduced

2025

WWDC25

Kind

Framework

Runs on

Get it from

iOS

26.0+

iPadOS

26.0+

Mac Catalyst

26.0+

macOS

26.0+

tvOS

visionOS

26.0+

watchOS

27.0+

Overview

The Foundation Models framework gives your app direct access to the model behind Apple Intelligence. Guided generation turns responses into your own Swift types, tool calling lets the model reach into your app, and sessions keep the conversation's context.

Since WWDC26 it also takes images, offers a larger reasoning model on Private Cloud Compute, works with other providers through the LanguageModel protocol, and the core framework is open source.

Guided generation

Get typed Swift values back with @Generable, not strings to parse.

Tool calling

Let the model call into your app for data it doesn't have.

Private Cloud Compute

A larger reasoning model, with no API keys or accounts.

Evaluations

Measure quality as you change prompts and models.

TripPlanner.swift

import FoundationModels

@Generable
struct Itinerary {
    @Guide(description: "A short, catchy title")
    var title: String
    var days: [String]
}

let session = LanguageModelSession(
    instructions: "You plan short city trips."
)

let trip = try await session.respond(
    to: "Three days in Kyoto",
    generating: Itinerary.self
).content

History