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JetBrains Launches Mellum2: Efficient AI Model

JetBrains introduces Mellum2, a 12B-parameter Mixture-of-Experts model optimized for text and code tasks, offering faster inference than its peers.

Published Jun 2, 2026, 11:20 AMUpdated Jun 2, 2026, 11:20 AM

What happened

JetBrains released Mellum2, a 12B Mixture-of-Experts model specializing in natural language and code tasks, promising efficiency in inference.

Why it matters

Mellum2's efficient inference and open-source availability could impact software engineering and AI system performance significantly.

Who is affected

AI and software engineering fields could benefit from Mellum2's efficient, specialized architecture and private deployment capabilities.

Risks / uncertainty

Details on performance across different environments and potential deployment challenges remain uncertain.