Apple's OpenELM, an open-source large language model (LLM), offers unprecedented transparency and accessibility in the field of natural language processing. Built upon a decoder-only transformer architecture, OpenELM introduces layer-wise scaling to optimize parameter allocation within its layers. The model demonstrates impressive performance across various benchmarks, outperforming many open-source counterparts like OLMo. Fine-tuning OpenELM using MosterAPI allows users to adapt the model to their specific datasets and achieve competitive results compared to proprietary LLMs at a lower inference cost.