Bonsai 27B is a new 27-billion parameter AI model capable of running on smartphones that outperforms similarly sized models like Gemma 4 in math and coding, despite lagging in vision tasks. Its impressive on-device performance has sparked community discussions about the shift toward specialized local AI tools rather than massive general-purpose models. Readers also debated the merits of Mixture of Experts architecture and the ongoing value of inductive biases in scaling edge AI.