JetBrains משחררת Mellum2.1: מודל פתוח 12B MoE לאגנטים קוד

תקציר מקורי באנגליתJetBrains has released Mellum2.1 , an open model built for coding agents and fast sub-agents. Mellum2.1 is a 12B mixture-of-experts thinking model from JetBrains that activates 2.5B parameters per token. It ships under Apache 2.0 on Hugging Face . The architecture is unchanged from Mellum2. The upgrade comes almost entirely from reinforcement learning (RL) in real software environments. The result is a small, self-hostable model that explores a repository, edits files, and checks its own changes. TL;DR Size: 12B total, 2.5B active (64 experts, 8 active), 131,072-token context Runs on: your own GPUs via vLLM or SGLang (speed tested on 1 NVIDIA H200). GGUF builds start at 7.0 GB for llama.cpp, Ollama and LM Studio. Performance: beats Mellum2 on 15 of 17 listed benchmarks; wins 5 of 17 agains