Bonsai 27B: 27B-parameter AI model compressed to fit on an iPhone

Jul 15, 2026

PrismML has compressed a 27-billion-parameter AI model, Bonsai 27B, to under 4 GB, making it small enough to run on an iPhone. According to the company's benchmarks, the smallest version retains 90% of the original performance, with math and coding scores largely unaffected. Apple is reportedly testing this compression technology.

Why it matters: This development could enable advanced AI capabilities directly on smartphones, reducing dependence on cloud computing and enhancing user privacy.

Full story at: The Decoder ↗