Uploaded June 2026 | Updated September 2026, 1 week ago

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Extend the Foundation Models framework by implementing a LanguageModelExecutor for new models. Explore how to interface with the LanguageModelSession’s transcript, manage session state effectively, and optimize KV cache utilization. Find out how to support custom segment types and unlock advanced capabilities for your generative AI features.

Explore related documentation, sample code, and more:
Foundation Models: developer.apple.com/documentation/FoundationModels
Core AI Models: github.com/apple/coreai-models
MLX Swift LM on GitHub: github.com/ml-explore/mlx-swift-lm
Build AI-powered scripts with the fm CLI and Python SDK: developer.apple.com/videos/play/wwdc2026/334
Build with the new Apple Foundation Model on Private Cloud Compute: developer.apple.com/videos/play/wwdc2026/319
What’s new in the Foundation Models framework: developer.apple.com/videos/play/wwdc2026/241
Build agentic app experiences with the Foundation Models framework: developer.apple.com/videos/play/wwdc2026/242

00:00 - Introduction
03:37 - Packaging
04:48 - Protocol
14:50 - Authentication
15:51 - Customization
19:47 - Next steps

More Apple Developer resources:
Video sessions: apple.co/VideoSessions
Documentation: apple.co/DeveloperDocs
Forums: apple.co/DeveloperForums
App: apple.co/DeveloperApp