Identity
- Type
- company
- Country label
- Czechia
- HQ country
- Czechia
- Founding country
- Czechia
- Parent
- not in the notes
- Parent country
- not in the notes
- Country basis
- the research notes
Where this comes from
Convention D1: a dual label, HQ first, when the HQ, founding or parent country differ.
Models by Class
code1
Models
ModelClassOpennessParametersReleased
Mellum2.1-12B-A2.5B-Thinkingcode8 Oct 2026Links
OrganisationJetBrainscompany, Czechia
JetBrainscompany, CzechiaUse Casesnone recorded
Who Runs Itnone recorded
Scores
| Benchmark | Model | Score | Who ran it | Setting |
|---|---|---|---|---|
| HumanEval+ | Mellum2.1-12B-A2.5B-Thinking | 91.5 % | vendor-reported | thinking mode |
| LiveCodeBench | Mellum2.1-12B-A2.5B-Thinking | 82 % | vendor-reported | thinking mode, LiveCodeBench v6 |
| MBPP+ | Mellum2.1-12B-A2.5B-Thinking | 79.4 | vendor-reported | thinking mode |
| SWE-bench Pro | Mellum2.1-12B-A2.5B-Thinking | 28 % | vendor-reported | thinking mode |
| SWE-bench Verified | Mellum2.1-12B-A2.5B-Thinking | 47 % | vendor-reported | thinking mode |
| Terminal-Bench | Mellum2.1-12B-A2.5B-Thinking | 17.4 % | vendor-reported | thinking mode |
Where this comes from
Every recorded score of this organisation's models, with who ran it. Scores from different settings are not directly comparable.
Sources
- huggingface.co/JetBrains https://huggingface.co/JetBrains
- huggingface.co/JetBrains/Mellum2.1-12B-A2.5B-Thinking https://huggingface.co/JetBrains/Mellum2.1-12B-A2.5B-Thinking
To cite this page: Project AURION, AI Use-Cases Research & Innovation, "JetBrains", https://aurion.semai.id/organisations/jetbrains/, records of October 2026.