JetBrains Releases Programming AI Model Mellum2.1 with Twice the Throughput of Competitors Under Heavy Load

JetBrains launches a new programming AI model called Mellum2.1, focusing on enhancing agent-based programming capabilities. The model continues with a 12B mixture-of-experts architecture and open-source licensing, lowering the barrier for enterprise and individual developers to deploy privately. In terms of training, reinforcement learning has expanded from short-term completion to become the core training component, with specialized reinforcement in millions of sandbox environments for software engineering and algorithms.