We are really excited to have introduced the Foundation Models framework in WWDC25. When using the framework, you might have feedback about how it can better fit your use cases. Starting in macOS/iOS 26 Beta 4, the best way to provide feedback is to use #Playground in Xcode. To do so: In Xcode, create a playground using #Playground. Fore more information, see Running code snippets using the playground macro. Reproduce the issue by setting up a session and generating a response with your prompt. In the canvas on the right, click the thumbs-up icon to the right of the response. Follow the instructions on the pop-up window and submit your feedback by clicking Share with Apple. Another way to provide your feedback is to file a feedback report with relevant details. Specific to the Foundation Models framework, it’s super important to add the following information in your report: Language model feedback This feedback contains the session transcript, including the instructions, the prompts, the responses, etc. Without that, we can’t reason the model’s behavior, and hence can hardly take any action. Use logFeedbackAttachment(sentiment:issues:desiredOutput: ) to retrieve the feedback data of your current model session, as shown in the usage example, write the data into a file, and then attach the file to your feedback report. If you believe what you’d report is related to the system configuration, please capture a sysdiagnose and attach it to your feedback report as well. The framework is still new. Your actionable feedback helps us evolve the framework quickly, and we appreciate that. Thanks, The Foundation Models framework team

On this talk: Bring an LLM provider to the Foundation Models framework URL: https://developer.apple.com/videos/play/wwdc2026/339/ on the coding examples a very peculiar framework is shown: import MLXFoundationModels However I am not able to find it nowhere, there is even a code section with this framework as part of an example. Where is this framework, there are no BETA branches on the MLX framework either. Thanks!

I am using the following code in my iOS application. #Playground { let session = LanguageModelSession() let response = try await session.respond(to: "List all states of USA.") print(response.content) } And I get the following error: The operation couldn’t be completed. (com.apple.SensitiveContentAnalysisML error 15.) I have turned off Apple Intelligence and turned on again. No use. I am using Xcode 27 beta 2. any ideas?

When importing FoundationModels in watchOS 27 Beta 2 this error appears: /Applications/Xcode-beta.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS27.0.sdk/System/Library/Frameworks/FoundationModels.framework/Modules/FoundationModels.swiftmodule/arm64e-apple-watchos.swiftinterface:6:15 Unable to resolve module dependency: 'CoreImage' Does anybody else have this issue?

I’ve been experimenting with Foundation Models and built a small Swift package that wraps LanguageModelSession with simple context management. The current approach checks the transcript token count using tokenCount(for:), compacts the transcript when it reaches a threshold, and retries once if exceededContextWindowSize is thrown. I’d appreciate feedback on whether this is a sensible use of Foundation Models APIs, especially around rebuilding a session from a compacted Transcript. GitHub: https://github.com/ricky-stone/FoundationContext

Unless I'm missing something, it seems like the quota usage information for the Private Cloud Compute model is too limited. You can tell if you've reached your quota or are below it. If you are below your quota, you can tell if you're approaching the limit, but what does this actually mean? Am I over 50%, 90%, 99%? It would be nice to have actual numbers in the quota. For example, I can see my token usage for a session. If an app could keep track of that versus the quota, you could come up with something way more useful for the user. Example: You have 100,000 tokens per month, this app has made 4 requests, that used a total of 5,000 tokens. If the user has used on 95,000 tokens of their quota so far, they know they can maybe make ~4 more requests from the app before the limit is reached, so they know to be careful with their usage. If they've only used 10,000 tokens of their quota so far, they know that have some breathing room and can use the feature more freely. The way the current system is designed, you have no idea at all. Adding real numbers (even percentages – if we can get usage percentages for the app as well), would really help in giving useful feedback to the user on their usage of PCC. Right now, everything is too vague.

I had a great run in the first decade of iOS development. Not so much since. I had 180k downloaded units in the last year - but I'm excluded from foundation models because I did well before 2015. That seems like an odd policy. Apart from anything else - it explicitly punishes long-term accounts... Lifetime downloads...

I have an app on the App Store that takes user content and creates a Generable struct out of it. In the last couple weeks I have started getting complains from my users that the part of the app leveraging FoundationModels isn't working properly. In my testing I noticed that the same request that would've worked a couple weeks ago is now getting errors with guardrails violation. I'm initializing my model this way LanguageModelSession(model: SystemLanguageModel(guardrails: .permissiveContentTransformations)) // I'm aware that .permissiveContentTransformations does not apply to Generable, but I'd really really really really love it, if it did!. This started around the iOS 26.5/macOS 26.5 releases and I wonder if there's a way to fix it.

Hi Apple Team, I'm trying to use the SkillActivation framework from the Foundation Models Utilities repository: https://github.com/apple/foundation-models-utilities Environment: Xcode 26 Beta iPadOS/macOS 26 Beta Apple Intelligence enabled Foundation Models Utilities: latest version from GitHub Issue: As soon as I import or use SkillActivation-related APIs, Xcode reports build errors and the project fails to compile. The rest of the Foundation Models framework works correctly, but the problem appears specifically when SkillActivation is added. Steps to Reproduce: Create a new project. Add foundation-models-utilities via Swift Package Manager. Import SkillActivation / follow the sample implementation. Build the project. Expected Result: The project should compile successfully and SkillActivation should be available. Actual Result: Xcode reports compilation errors and the build fails. Questions: Is there any additional entitlement, capability, or configuration required for SkillActivation? Is SkillActivation currently supported in Xcode 26 Beta? Are there any known issues with the current version of foundation-models-utilities? Thank you.

On iOS 27 Beta 1, it looks like the user must enable either "Siri"/"Hey Siri" or "Press Side Button for Siri" in iOS settings for SystemLanguageModel.default.availability to report true. Otherwise, it returns .appleIntelligenceNotEnabled. Is this expected behavior? This doesn't seem very intuitive. The user might very well want to use in-app AI functionalities without wanting to talk / press side button for Siri. Also, with the new "pull down for Siri" UX these are not the only way to interact with Siri anyway.

Hello, I recently learned about Private Cloud Compute (PCC): https://developer.apple.com/private-cloud-compute/ I am currently using a standard Developer Program account, and it seems that I cannot apply for the program directly. Is there an alternative? Also, is there any additional fee for using this service? If I want to call PCC in the app, for example, using the following code: let session = LanguageModelSession( model: PrivateCloudComputeLanguageModel() ) Do I need to apply for a specific plan to ensure that my App is successfully published on the App Store and available to users? Thank you!

Apologies, if I've missed the answer already here, I've searched around but can't find it. Foundation models and Private Cloud Compute require Apple Intelligence to be enabled in Settings as mentioned here. At the same time it says that Foundation Models PCC calls are supported on all Apple Watch models that run WatchOS 27. So, will there be a seperate Apple Intelligence setting in WatchOS 27 for those devices? Otherwise if a user has an Apple Watch Series 11 (which does support Apple Intelligence) paired with an iPhone 15 (which doesn't support Apple Intelligence), will they be unable to use the Foundation Models PCC calls from WatchOS in my app? Despite the fact the iPhone isn't involved in these queries anyway?

In the new Xcode we saw examples of Claude, OAI & Google coding agents that you can start conversations with inside your project, giving it access to your project files context. As far as I understand, this requires an API key for those models & the processing is run on Anthropic / Google servers, not locally nor on Private Cloud Compute. Is it possible to instead, use the LLM powering Foundation Models, for a “Siri Code Agent” which operates in the place of those models, but runs on device or in Private Cloud Compute? I like how this works for Siri AI requests, and would love to have a coding assistant agent that can operate in the same privacy preserving way! Is this possible with any of the open source frameworks or the command line tools? If not, what is the best way to request this feature?

Whisper and other STT APIs let you pass a custom vocabulary or initial_prompt to bias recognition toward domain-specific proper nouns. In the App Intents / Siri stack, is there an equivalent way to supply dynamic, per-user term lists — for example favorites or recently used items — to improve how spoken names are transcribed or resolved?

Is anything configurable for LanguageModelSession.Guardrails besides the default? I'm prototyping a camping app, and it's constantly slamming into guardrail errors when I use the new foundation model interface. Any subjects relating to fishing, survival, etc. won't generate. For example the prompt "How can I kill deer ticks using a clothing treatment?" returns a generation error. The results that I get are great when it works, but so far the local model sessions are extremely unreliable.

During WWDC26 Keynote a second generation on-device model was announced with better speech generation capabilities. Is there a new API available for developers to generate speech?

What is the proper way to intercept tool calls modify them or dynamically approve/reject them?

We understand that on-device Foundation Models (FMs) can evolve between OS releases. To help us accurately scope our application capabilities and performance expectations for multiplatform development, could you clarify the variation of these new on-device models across different hardware? Specifically: Within the same OS & device family: Do the architecture, parameters, or capabilities of the on-device models vary based on hardware tiers (e.g., iPhone vs. iPhone Pro, or MacBook Air M5 vs. MacBook Pro with M5 Pro)? Across different device form factors: Are there model variations between hardware families running equivalent OS releases (e.g., Mac vs. iPhone)? Knowing if we are targeting a uniform model baseline or a tiered model ecosystem will greatly help us optimise our App Intelligence features or at least set us with proper expectations in scope and capabilities. Thanks.

I am trying out the new PrivateCloudComputeLanguageModel but can't get it to work. When I call session.respond it throws the following error: Error Domain=FoundationModels.LanguageModelError Code=-1 "The operation couldn’t be completed. (FoundationModels.LanguageModelError error -1.)" UserInfo={NSMultipleUnderlyingErrorsKey=( "Error Domain=FoundationModels.LanguageModelError Code=-1 \"(null)\" UserInfo={NSMultipleUnderlyingErrorsKey=(\n \"Error Domain=ModelManagerServices.ModelManagerError Code=1046 \\\"(null)\\\" UserInfo={NSMultipleUnderlyingErrorsKey=(\\n)}\"\n)}" ), NSLocalizedDescription=The operation couldn’t be completed. (FoundationModels.LanguageModelError error -1.)} Maybe error code 1046 means something, but I can't find a mention of it in the docs. My set-up: macOS Golden Gate on a MacBook Pro M1 Xcode 27.0.0 beta 1, calling the model as part of a test on a iPhone 17 simulator with iOS 27 beta 1. I do have the Private Cloud Compute entitlement (removing it triggers a fatalError). model.isAvailable returns true. I tried logging into iCloud on both the macOS host as well as the simulator, but no difference. Relevant code: calling the model: https://github.com/Thomvis/Construct/blob/feature/foundation-models/Sources/MechMuse/FoundationModels.swift#L20 the test to run to trigger the issue: https://github.com/Thomvis/Construct/blob/feature/foundation-models/App/UnitTests/DescribeCombatantsEvaluation.swift#L78

Given that Foundation Models focus on native Swift APIs, is there any supported bridge for a WebKit-based app to access the Language Model Protocol?