In the rapidly evolving domain of artificial intelligence, open-source Large Language Models (LLMs) are playing a pivotal role. This talk aims to examine the significance of open-source models in democratising AI technology and fostering innovation. We will explore the key players in the open-source LLM landscape, highlighting how these models vary in terms of architecture, capabilities, and applications. Furthermore, practical insights on how to leverage these models for various use cases will be provided. Attendees will gain an understanding of the potential outcomes and transformative impacts that can be achieved through the effective utilisation of open-source LLMs.