Installed Beta 2 on my iPhone. The Liquid Glass effect is nice, but too present in such a small screen estate. It feels somehow “baroque”.
As screens are larger, I find it much more pleasant on iPadOS and macOS.
Interesting, it's kind of counterintuitive. But will try.
And that’s all I know!
For more resources:
- WWDC videos
- machinelearning.apple.com/research/app...
📊 Telemetry
No data is collected by Apple via telemetry.
🧪 Adaptor Training Toolkit
Allows model adaptation via Fine-Tuning (presumably LoRa) but, as mentioned in the videos, you should re-run the FT each time the underlying model is updated (which means at every iOS release or so)
🔐 Safety model
A built-in guardrail AI model is automatically added and enforced by Apple.
It cannot be modified or disabled. No API for building your own as of now.
🔄 Background inference
Foundation Models framework supports background inference!
But subject to system-level constraints:
– Rate-limited
– Cancelled during camera or AAA games usage
– Throttled or terminated in case of resource pressure
⚙️ Hardware execution
Runs primarily on ANE (Apple Neural Engine).
This means you can use GPU while running inference — but prolonged concurrent usage can cause system stress, which may lead the system to terminate your app, even if in foreground.
🧬 Model versioning
Same model version across all supported devices — no per-device variation. Whether you’re running an old iPad, the latest iPhone or even macOS, it’s exactly the same model. Perfect for testing and consistency across your multiplatform apps!
🔢 Context size
Not officially documented as it might change anytime.
But today the limit stands at 4096 tokens.
Foundation Models framework is beautiful.
I had the opportunity of grabbing a WWDC lab, and here’s a bunch of info you might find useful.
🧵
Sure. That said, it’s not about models but about features: Cursor has agent modes, custom modes, MCP integration and frequent updates. I don’t see how Xcode can keep up with this, but I hope to be wrong.
Oops, forgot mentioning.
I’m on the Beta, it wouldn’t work otherwise.
On macOS, System Language and Siri must be set to the same language (and the setting is irritantly reflected on your iPhone). Then make sure Apple Intelligence is turned on.
At that point it should work.
(Or at least it does for me. I’m using English (UK))
Ha! Try again or double check the settings on the simulator. (Maybe locale / language?) It should work. (Unless I hallucinated last night)
By far the Foundation Models framework. Wonderful API IMO, and so feature rich.
Can’t agree more. For what it’s worth I submitted it as a feedback in the satisfaction form.
The level of “self-referential” of the last two videos is cring-ish.
Thinking about Dia (and @perplexity_ai’s Comet - which I haven’t tried yet).
But in an AI-first world, apps who have the most potential are IMO those like @raycastapp, offering a deep integration with the system that goes way beyond browsing. And they’re far from being sherlocked
macOS Beta is usable as a daily driver on my MBPro M1. And by usable, I mean "usable". It's not perfect, but it doesn't crash. Mean issues so far: far from buttery smooth (esp. Safari, which is sluggish to say the least) + quick battery drain.
The UI is not radically different, but it's pleasant.
As much as I loved “Letter to Arc members” by @browsercompany I feel that for my own personal use, Dia is a step in the wrong direction. I find that features like command bar (with actions) or the swipe to change the profile were true productivity enhancers.
At this point the most disappointing Apple product is the Apple Watch. Sure they sold millions of it but it now sits in a purgatory between being too power hungry to have a long lasting battery life and but too constrained to run a SLM or proper background tasks.
I’m glad to see such a feature-rich Foundation Models framework and its API so pleasantly “swifty”.
A simple inference API would have already been good, but FMf goes way beyond that.
Why do I feel such a strong urge to try your alarm app?
The ChatGPT integration in Xcode will certainly useful at some point. But at the moment is still ages behind Cursor (via the xcode-build-server integration, cf @dimillian.app's tutorial).
Swift Assist DOA?! #WWDC25
Not sure Background Task APIs are the right answer but it's certainly a step in the right direction. #WWDC25
Ok, I lied. I was also hoping for these new iPad features! #WWDC25
Shortcuts looks neat, even as a Raycast user. #WWDC25
To me the only meaningful update to watchOS would be a truly minimal version that would allow the battery to last at least 4 days.
Screen Visual Intelligence hopefully available (in Europe) before Winter 2029. #WWDC25
