Introducing Mellum2: A 12B Mixture-of-Experts Model by JetBrains
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AI & ML interests
Reliable and context-aware coding assistance
Recent Activity
Papers
Mellum2 Technical Report
The Best of N Worlds: Aligning Reinforcement Learning with Best-of-N Sampling via max@k Optimisation
Articles
JetBrains/Qwen3.8-3.6-27B-blend-GGUF
Image-Text-to-Text • 27B • Updated • 10.9k • 36
JetBrains/Mellum2.1-12B-A2.5B-Thinking
Text Generation • 12B • Updated • 3.99k • 168
JetBrains/Mellum2.1-12B-A2.5B-Thinking-GGUF
Text Generation • 12B • Updated • 137k • 127
JetBrains/Qwen3.8-3.6-27B-blend-MTP-MLX-4bit
0.4B • Updated • 1.26k • 8
JetBrains/Qwen3.8-3.6-27B-blend-MLX-4bit
Image-Text-to-Text • 27B • Updated • 1.58k • 11
JetBrains/Qwen3.8-3.6-27B-blend
Image-Text-to-Text • 28B • Updated • 1.38k • 37
JetBrains/Mellum2-12B-A2.5B-Base-Pretrain
Text Generation • 12B • Updated • 279 • 14
JetBrains/Mellum2-12B-A2.5B-Thinking-SFT
Text Generation • 12B • Updated • 4.35k • 25
JetBrains/Mellum2-12B-A2.5B-Instruct-SFT
Text Generation • 12B • Updated • 325 • 14
JetBrains/Mellum2-12B-A2.5B-Thinking
Text Generation • 12B • Updated • 3.13k • 346
JetBrains/Mellum2-12B-A2.5B-Instruct
Text Generation • 12B • Updated • 15.2k • 89
JetBrains/Mellum2-12B-A2.5B-Base
Text Generation • 12B • Updated • 13.4k • 29
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-MXFP4_MOE
Text Generation • 12B • Updated • 715 • 10
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q4_K_M
Text Generation • 12B • Updated • 88.9k • 20
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q6_K
Text Generation • 12B • Updated • 347 • 9
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-Q8_0
Text Generation • 12B • Updated • 152k • 9
JetBrains/Mellum2-12B-A2.5B-Instruct-GGUF-BF16
Text Generation • 12B • Updated • 99 • 2
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-MXFP4_MOE
Text Generation • 12B • Updated • 464 • 13
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q4_K_M
Text Generation • 12B • Updated • 2.51k • 51
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q6_K
Text Generation • 12B • Updated • 245 • 13
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-Q8_0
Text Generation • 12B • Updated • 361 • 23
JetBrains/Mellum2-12B-A2.5B-Thinking-GGUF-BF16
Text Generation • 12B • Updated • 95 • 6
JetBrains/Mellum-4b-dpo-python-gguf
4B • Updated • 40 • 5
JetBrains/Mellum-4b-dpo-python
Text Generation • 187k • Updated • 121 • 10
JetBrains/Mellum-4b-dpo-all-gguf
4B • Updated • 107 • 12
JetBrains/Mellum-4b-dpo-all
Text Generation • 187k • Updated • 193 • 13
JetBrains/Mellum-4b-sft-all
Text Generation • 4B • Updated • 981 • 17
JetBrains/Mellum-4b-sft-all-gguf
4B • Updated • 231 • 7
JetBrains/Mellum-4b-sft-kotlin-gguf
4B • Updated • 196 • 6
JetBrains/Mellum-4b-sft-kotlin
Text Generation • 4B • Updated • 118 • 22