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Foundation Model Group Session Notes

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  • Simulator testing for the model requires the host machine to run macOS Tahoe for simulators.

  • There are rate limits when the app is in the background, but no limits in the foreground. However, if the system is under heavy load due to other processes outside the application, the system could limit API usage when device performance might be compromised.

  • Foundation Model language support includes all languages supported by Apple Intelligence.

  • Get the language code from the locale, and you can specify it using the supported languages API property to check for availability.

  • For context generation in other languages, it’s advised to put instructions in English and provide user input in whatever language the user wants. This gives the best outputs.

  • For advanced usage, Apple has a training tool in Foundation Model to train the model with custom data. Each adapter can be trained, but when Apple provides updates to the models, you should retrain the model. This is for very advanced users.

  • Apple provides updates to Foundation Model only through OS updates.

Will update more information on using Foundation Models later. Thanks for reading.

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Abilash S
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Abilash S
Software engineer passionate about clean code, productivity systems, and knowledge management. I write about development practices, tool discoveries, and the intersection of technology and organized thinking. When not coding, you’ll find me tinkering with Emacs configurations or exploring new ways to capture and connect ideas.
wwdc25 - This article is part of a series.
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