# JetBrains Mellum2.1: From 2% to 47% on SWE-Bench

> Source: <https://byteiota.com/jetbrains-mellum2-1-from-2-to-47-on-swe-bench/>
> Published: 2026-10-31 01:10:39+00:00

JetBrains Mellum2.1 hits 47% on SWE-bench Verified using reinforcement learning as its main training loop. Apache 2.0, 12B MoE, runs on a 12 GB GPU. Here's how to use it.

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JetBrains Mellum2.1: From 2% to 47% on SWE-Bench
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