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 • 803 • 100
JetBrains/Mellum2.1-12B-A2.5B-Thinking-GGUF
Text Generation • 12B • Updated • 17.6k • 62
JetBrains/Qwen3.8-3.6-27B-blend-GGUF
Image-Text-to-Text • 27B • Updated • 7.85k • 30
JetBrains/Qwen3.8-3.6-27B-blend-MTP-MLX-4bit
0.4B • Updated • 1.02k • 8
JetBrains/Qwen3.8-3.6-27B-blend-MLX-4bit
Image-Text-to-Text • 27B • Updated • 1.23k • 10
JetBrains/Qwen3.8-3.6-27B-blend
Image-Text-to-Text • 28B • Updated • 1.19k • 34
JetBrains/Mellum2-12B-A2.5B-Base-Pretrain
Text Generation • 12B • Updated • 230 • 12
JetBrains/Mellum2-12B-A2.5B-Thinking-SFT
Text Generation • 12B • Updated • 3.98k • 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 • 14.3k • 88
JetBrains/Mellum2-12B-A2.5B-Base
Text Generation • 12B • Updated • 21.3k • 29
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-MXFP4_MOE
Text Generation • 12B • Updated • 938 • 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 • 472 • 8
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q8_0
Text Generation • 12B • Updated • 159k • 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 • 544 • 13
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q4_K_M
Text Generation • 12B • Updated • 2.61k • 51
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q6_K
Text Generation • 12B • Updated • 346 • 12
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q8_0
Text Generation • 12B • Updated • 540 • 23
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-BF16
Text Generation • 12B • Updated • 102 • 6
JetBrains/Mellum-4b-dpo-python-gguf
4B • Updated • 36 • 5
JetBrains/Mellum-4b-dpo-python
Text Generation • 187k • Updated • 132 • 10
JetBrains/Mellum-4b-dpo-all-gguf
4B • Updated • 96 • 11
JetBrains/Mellum-4b-dpo-all
Text Generation • 187k • Updated • 254 • 12
JetBrains/Mellum-4b-sft-all
Text Generation • 4B • Updated • 895 • 16
JetBrains/Mellum-4b-sft-all-gguf
4B • Updated • 75 • 7
JetBrains/Mellum-4b-sft-kotlin-gguf
4B • Updated • 44 • 6
JetBrains/Mellum-4b-sft-kotlin
Text Generation • 4B • Updated • 110 • 22