Mellum2.1-12B-A2.5B-Thinking

JetBrains/Mellum2.1-12B-A2.5B-Thinking

Text Generation12.1B parameterstransformersLicense: apache-2.0

Tracked by OpenModelStats since October 8, 2026View on Hugging Face ↗

Downloads 30D: 583
Total downloads: 583
Gained 7D: —
Gained 30D: —
Likes: 91
Rank · tracked models: #53,953; 1380(up 1380 places)this week
Parameters: 12.1B
Last source update: Oct 7, 2026

It moved from #17046 to #16637 among tracked Text Generation models this week.

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Overview

Mellum2.1-12B-A2.5B-Thinking is a text generation model published by JetBrains. OpenModelStats has tracked the model since Oct 8, 2026, most recently observing it 13h ago.

Published: Sep 20, 2026
Last updated: Oct 7, 2026
Library: transformers
License: apache-2.0
Task: Text Generation
Parameters: 12,149,923,072
Spaces: —
Derivative models: —
Velocity 7D/day: —

transformerssafetensorsmellumtext-generationconversationalenarxiv:2605.31268base_model:JetBrains/Mellum2-12B-A2.5B-Basebase_model:finetune:JetBrains/Mellum2-12B-A2.5B-Baselicense:apache-2.0model-indexendpoints_compatible

Publisher

JetBrainsView publisher statistics →

Derived from JetBrains/Mellum2-12B-A2.5B-Base (reported by the source; parent not yet tracked).

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Mellum2-12B-A2.5B-BaseJetBrains	Text Generation	22.2K	29	12.1B
Mellum2-12B-A2.5B-InstructJetBrains	Text Generation	14.2K	88	12.1B
Mellum2-12B-A2.5B-Thinking-SFTJetBrains	Text Generation	3,307	25	12.1B
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Mellum2-12B-A2.5B-Instruct-4bitmlx-community	Text Generation	336	2	12.1B
Mellum2-12B-A2.5B-Instruct-mxfp4mlx-community	Text Generation	311	4	12.1B