Introducing Mellum2: A 12B Mixture-of-Experts Model by JetBrains
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AI & ML interests
Reliable and context-aware coding assistance
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Papers
Mellum2 Technical Report
The Best of N Worlds: Aligning Reinforcement Learning with Best-of-N Sampling via max@k Optimisation
Articles
JetBrains/Mellum2.1-12B-A2.5B-Thinking
Text Generation • 12B • Updated • 1.07k • 113
JetBrains/Mellum2.1-12B-A2.5B-Thinking-GGUF
Text Generation • 12B • Updated • 20.6k • 77
JetBrains/Qwen3.8-3.6-27B-blend-GGUF
Image-Text-to-Text • 27B • Updated • 8.12k • 30
JetBrains/Qwen3.8-3.6-27B-blend-MTP-MLX-4bit
0.4B • Updated • 1.05k • 8
JetBrains/Qwen3.8-3.6-27B-blend-MLX-4bit
Image-Text-to-Text • 27B • Updated • 1.27k • 10
JetBrains/Qwen3.8-3.6-27B-blend
Image-Text-to-Text • 28B • Updated • 1.2k • 35
JetBrains/Mellum2-12B-A2.5B-Base-Pretrain
Text Generation • 12B • Updated • 231 • 13
JetBrains/Mellum2-12B-A2.5B-Thinking-SFT
Text Generation • 12B • Updated • 4.31k • 25
JetBrains/Mellum2-12B-A2.5B-Instruct-SFT
Text Generation • 12B • Updated • 333 • 14
JetBrains/Mellum2-12B-A2.5B-Thinking
Text Generation • 12B • Updated • 2.96k • 344
JetBrains/Mellum2-12B-A2.5B-Instruct
Text Generation • 12B • Updated • 15.7k • 88
JetBrains/Mellum2-12B-A2.5B-Base
Text Generation • 12B • Updated • 20.9k • 29
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-MXFP4_MOE
Text Generation • 12B • Updated • 917 • 10
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q4_K_M
Text Generation • 12B • Updated • 88.6k • 19
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q6_K
Text Generation • 12B • Updated • 454 • 8
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q8_0
Text Generation • 12B • Updated • 158k • 8
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-BF16
Text Generation • 12B • Updated • 115 • 2
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-MXFP4_MOE
Text Generation • 12B • Updated • 551 • 13
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q4_K_M
Text Generation • 12B • Updated • 2.63k • 51
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q6_K
Text Generation • 12B • Updated • 344 • 12
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q8_0
Text Generation • 12B • Updated • 545 • 23
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-BF16
Text Generation • 12B • Updated • 107 • 6
JetBrains/Mellum-4b-dpo-python-gguf
4B • Updated • 35 • 5
JetBrains/Mellum-4b-dpo-python
Text Generation • 187k • Updated • 134 • 10
JetBrains/Mellum-4b-dpo-all-gguf
4B • Updated • 94 • 11
JetBrains/Mellum-4b-dpo-all
Text Generation • 187k • Updated • 255 • 12
JetBrains/Mellum-4b-sft-all
Text Generation • 4B • Updated • 932 • 16
JetBrains/Mellum-4b-sft-all-gguf
4B • Updated • 71 • 7
JetBrains/Mellum-4b-sft-kotlin-gguf
4B • Updated • 44 • 6
JetBrains/Mellum-4b-sft-kotlin
Text Generation • 4B • Updated • 116 • 22