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JetBrains Releases Mellum2, a 12B Mixture-of-Experts Coding Model
June 1, 2026
JetBrains launched Mellum2, a 12B-parameter Mixture-of-Experts model focused on code, available on Hugging Face. No benchmark numbers or architectural details are available from the source.
HOW THIS AFFECTS YOU
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builderYou can evaluate Mellum2 as an open-weight coding model for IDE integration or self-hosted code completion pipelines.
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researcherA JetBrains-trained MoE at 12B parameters is worth benchmarking against similarly sized dense coding models to assess MoE efficiency tradeoffs.