LLM EXPLORER 61,491 MODELS INDEXED

Mellum2 12B A2.5B Thinking by JetBrains

By JetBrains · 6221 downloads
HF Repo ↗ Copy URL

Mellum2 12B A2.5B Thinking is an open-source language model by JetBrains. Features: 12b LLM, VRAM: 24.3GB, Context: 128K, License: apache-2.0, LLM Explorer Score: 0.35.

  Arxiv:2605.31268   Conversational   Deploy:sagemaker   En   Endpoints compatible   Eval-results   Mellum   Model-index   Region:us   Safetensors   Sharded   Tensorflow
Model Card on HF 🤗: https://huggingface.co/JetBrains/Mellum2-12B-A2.5B-Thinking 

Mellum2 12B A2.5B Thinking Parameters and Internals

LLM NameMellum2 12B A2.5B Thinking
Repository 🤗https://huggingface.co/JetBrains/Mellum2-12B-A2.5B-Thinking 
Model Size12b
Required VRAM24.3 GB
Updated2026-07-31
MaintainerJetBrains
Model Typemellum
Model Files  5.0 GB: 1-of-5   5.0 GB: 2-of-5   5.0 GB: 3-of-5   5.0 GB: 4-of-5   4.3 GB: 5-of-5
Supported Languagesen
Model ArchitectureMellumForCausalLM
Licenseapache-2.0
Context Length131072
Model Max Length131072
Transformers Version5.8.1
Tokenizer ClassPreTrainedTokenizerFast
Padding Token<|endoftext|>
Vocabulary Size98304

Quantized Models of the Mellum2 12B A2.5B Thinking

Model
Likes
Downloads
VRAM
...ellum2 12B A2.5B Thinking 4bit11266 GB
...m2 12B A2.5B Thinking Mlx 4bit55217 GB

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Mellum2 12B A2.5B Base128K / 24.3 GB1675323
Mellum2 12B A2.5B Instruct128K / 24.3 GB449882
...llum2 12B A2.5B Thinking Mxfp4128K / 6.4 GB3011
...llum2 12B A2.5B Instruct Mxfp4128K / 6.4 GB1661
...12B A2.5B Thinking Abliterated128K / 24.3 GB765
...ellum2 12B A2.5B Thinking 4bit128K / 6.8 GB1261
...m2 12B A2.5B Thinking Mlx 4bit128K / 7.3 GB5215
...ellum2 12B A2.5B Instruct 4bit128K / 6.8 GB141