Phi-3.5-MoE-instruct is a lightweight, multilingual AI model developed by Microsoft, built on high-quality, inference-intensive data, supporting a context length of up to 128K. The model has undergone a rigorous enhancement process, including supervised fine-tuning, proximal policy optimization, and direct preference optimization, to ensure precise instruction-following and robust safety measures. It is designed to accelerate research in language and multimodal models, serving as a building block for generative AI capabilities.