Bonsai 27B: A 27B-Parameter LLM That Fits on an iPhoneFri, Jul 17, 2026 Bonsai 27B PrismML on-device AIBonsai 27B compresses a 27B-parameter Qwen3.6 model to 3.9GB using native 1-bit weights and runs on an iPhone at 11 tok/s. Here's what it gives up.