Megatron-LM is a large-scale language model training framework developed by Facebook AI. It uses a technique called model parallelism to train models on multiple GPUs at the same time, increasing training speed and efficiency. The framework is designed for training transformer-based models, specifically those with large numbers of parameters like BERT and RoBERTa. --- Why it matters: This matters because language model training is computationally intensive and often requires significant resources. Megatron-LM's approach to parallelization can help researchers train larger and more complex models, potentially leading to breakthroughs in natural language processing tasks such as question answering and text generation. Source: https://huggingface.co/blog/megatron-training