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MON, 19 OCT · 85 ITEMS
"JetBrains releases Mellum2 model" — r/LocalLLaMA · AI & Technology
JetBrains has open-sourced Mellum2, a 12-billion-parameter mixture-of-experts () language model designed for software engineering tasks. The model uses only 2.5 billion per token, balancing performance and efficiency. It is optimized for coding workflows and can be run locally with tools like .
The claim is solid. JetBrains published an official blog post on June 1, 2026, announcing the open-source release of Mellum2, and the model is available on Hugging Face. The Reddit post from October 18, 2026, is a secondary report of that event, so the underlying fact is well-established.
The news item was posted on October 18, 2026, but the underlying release of Mellum2 occurred in June 2026, so this is not genuinely new.