Phi-2 is a compact language model developed by Microsoft Research. Accessible on the Azure model catalog, it utilizes recent advances in model scaling and the curations of training data. As such, it is particularly suited to tasks requiring detailed mechanistic interpretability. The model's smaller scale, coupled with its novel design aspects, makes it particularly useful for conducting safety improvements and fine-tuning experimental tasks. Due to the compressed nature of Phi-2, it can be readily utilized to probe intricate facets of AI interpretability and hone performance across a variety of tasks. Despite its compact size, the model still manages to deliver significant power, making it a versatile tool in AI exploration. This balance between size and strength forms the baseline of its innovative design. Hence, Phi-2 offers an optimal blend of utility and convenience for AI research and application development.