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Apple's Evaluations framework: testing non-deterministic Foundation Models features

Testing the Untestable: A Deep Dive into Apple's Evaluations Framework

How to test generative, non-deterministic features with Apple’s Evaluations framework, the five steps of an evaluation, datasets and the Loader protocol, synthetic sample generation, evaluators and metrics, and the compiler gotchas hit along the way.

July 19, 2026 · 22 min · Walid Sassi