The A.X K1 Deep Dive: A 519B MoE Model with Think-Fusion Intelligence

Deep Dive into A.X K1: Architecture Design and Think-Fusion Evolution of a 519B MoE Model Snippet: A.X K1 is a 519B-parameter Mixture-of-Experts (MoE) model by SK Telecom, activating only 33B parameters for efficient inference. It introduces the Think-Fusion training recipe, enabling a unified model to switch between high-speed “intuition” and deep “reasoning” modes, setting new benchmarks in Korean and multi-language AI performance. In the pursuit of Artificial General Intelligence (AGI), the industry faces a constant tug-of-war: how to maintain massive model capacity without skyrocketing inference costs. The newly released A.X K1 technical report provides a definitive answer. By leveraging a …