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JetBrains

Mellum models you can run locally

JetBrains, the maker of IntelliJ IDEA and other developer tools, builds Mellum, a family of open models for coding and software engineering agents.

1 model·MellumOfficial website ↗
Text & Coding

Available models

Ordered from the lightest model to the largest.

Mellum 2.1 12B-A2.5B

12B · 2.5B active · MoE

6.6GB

JetBrains' thinking MoE for agentic coding — RL-trained inside real repositories, 2.5B active

128K ctx