Daniel Steinberg returns to chat about Apple's Foundation Models framework and what changed in OS 27. We get into using AI only where it's appropriate, experimenting with #Playground, falling back gracefully when the model isn't there, when Private Cloud Compute is worth the trip, sessions, instructions and @Generable, tools and dynamic profiles, testing with the new Evaluations framework, and why AI should learn to say "I don't know."

Guest

• Dim Sum Thinking
• The Editor's Cut - Books by Daniel Steinberg
  • The Puzzle of the Perfectly Paved Path: An Introduction to App Intents
• Top Tracks
• Daniel Steinberg on X (@dimsumthinking)
• Daniel Steinberg on Mastodon (@dimsumthinking@mastodon.social)

Related Links

• What's new in the Foundation Models framework (WWDC26)
• Build agentic app experiences (WWDC26)
• Build AI-powered scripts with the fm CLI and Python SDK (WWDC26)
• Meet the Evaluations framework (WWDC26)
• Build with the new Apple Foundation Model on Private Cloud Compute (WWDC26)
• Bring an LLM provider to the Foundation Models framework (WWDC26)
• Foundation Models - Apple Developer Documentation
• Image Playground - Apple Developer Documentation
• Ship the Fallback First - Jeroen Leenarts
• Do iOS 2026 - Intro to Foundation Models workshop
• Bushel - macOS Virtual Machine App for Developers

Related Episodes

• Functional Programming with Daniel Steinberg
• Do the Wrong Thing Much Faster with Graham Lee
• We Don't Have Any Futures or Promises Anymore with Tim Condon
• Practical Agents with Donny Wals
• Everyone Thinks They're Good at Prompting with Joe Fabisevich

Chapters

• (00:00) - Stage Three: Using AI Where Appropriate
• (05:19) - Experimenting with #Playground
• (07:36) - What's New in OS 27
• (13:33) - Fallbacks and Private Cloud Compute
• (21:12) - Sessions, Instructions, and @Generable
• (28:26) - Tools, Dynamic Profiles, and Streaming
• (37:12) - Images and Testing with Evaluations
• (43:21) - Platforms, Privacy, and the Cost of Tokens

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Music from https://filmmusic.io "Blippy Trance" by Kevin MacLeod (https://incompetech.com) License: CC BY (http://creativecommons.org/licenses/by/4.0/)