During WWDC25, Apple announced new versions of its on-device and cloud-based foundation models. Now, they have published a tech report detailing how those models were trained, optimized, and evaluated. And the report includes some genuinely interesting under-the-hood tidbits.
In a comprehensive document called “ “, the company walks through multiple aspects of the new models, including their architecture, data sources, pre-training, post-training, tool use development, optimizations, and benchmarks.
