Unlocking large scale AI training networks with MRC (Multipath Reliable Connection)

MRC (Multipath Reliable Connection) is OpenAI's networking technology designed to enable efficient large-scale AI training by improving communication reliability and performance across distributed supercomputer clusters. The technology addresses the challenges of coordinating vast numbers of GPUs and other compute resources required for training large language models and other AI systems. By utilizing multiple network paths and implementing robust connection management, MRC helps reduce bottlenecks and failures that occur when scaling AI training to unprecedented levels.

Source: OpenAI | 2026-05-05