Bonsai 27B: The First 27B-Class AI Model Running on a Phone

Bonsai 27B (1-bit LLM): The First 27B-Class Model to Run on a Phone

We are thrilled to announce Bonsai 27B, the first 27B-class model capable of running on a smartphone. By utilizing advanced 1-bit and ternary weight compression, we have reduced the model size to just 3.9GB without sacrificing critical reasoning or vision capabilities. This breakthrough enables powerful, private, on-device agentic workflows that were previously impossible on mobile hardware, marking a major shift in where advanced AI can operate.

"Raw capability determines what a model can do; density determines where it can do it."