Mellum4 min read
Mellum2.1 Gets to Work: A Fast Open Model for Coding Agents
Trained with reinforcement learning in real environments, Mellum2.1 is built for coding agents and fast sub-agents that run on your own hardware. Today, we’re releasing Mellum2.1, the next version of the 12B mixture-of-experts model we open-sourced in June.
By Bulat SalimzianovJetBrains AI Blog

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Originally published by JetBrains AI Blog on Oct 8, 2026.
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