Hugging Face BlogJun 1, 2026, 3:45 PM

Introducing Mellum2: A 12B Mixture-of-Experts Model by JetBrains

JetBrains introduced Mellum2, a 12B Mixture-of-Experts model.

JetBrains introduced Mellum2, a 12B Mixture-of-Experts model. The supplied title confirms the model name, publisher, scale, and architecture description only. Without the article body, its intended use, licensing, availability, training details, benchmarks, and deployment requirements cannot be verified.

JetBrains has published Mellum2 on the Hugging Face Blog. Based on the title currently available, it can be confirmed that Mellum2 is a 12B Mixture-of-Experts (MoE) model launched by JetBrains. MoE is a description of the model architecture, but the title alone cannot determine Mellum2's number of experts, the actually-activated parameter count during inference, the context length, the training corpus, the supported languages, or the hardware requirements.

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