Large neural networks are crucial for recent AI advancements. However, training these complex models is a significant challenge that involves coordinating multiple Graphics Processing Units (GPUs) to perform a single calculation in unison. This requires sophisticated engineering and research efforts to optimize the process. According to OpenAI, large neural networks require orchestrating a cluster of GPUs to perform synchronized calculations. --- Why it matters: This matters because it affects the development of AI models that rely on these large neural networks. Improving training techniques can lead to better performance and efficiency in areas like natural language processing, computer vision, and speech recognition. Source: https://openai.com/index/techniques-for-training-large-neural-networks