JetBrains · 12B (2.5B active) · Mixture of Experts
JetBrains' thinking MoE for agentic coding — RL-trained inside real repositories, 2.5B active Check if your GPU or Mac can run Mellum 2.1 12B-A2.5B locally — 6.7 GB min, 11.2 GB recommended.
2026-09128K context
Mixture of Experts
Total experts: 64
Active experts: 8
Active params: 2.5B
| Quant | Bits | VRAM | Quality | Status |
|---|---|---|---|---|
| Q2_K | 2 | 4.3 GB | low | — |
| Q3_K_M | 3 | 5.9 GB | moderate | — |
| Q4_K_M | 4 | 6.6 GB | good | — |
| Q5_K_M | 5 | 8.2 GB | good | — |
| Q6_K | 6 | 9.7 GB | excellent | — |
| Q8_0 | 8 | 12.8 GB | excellent | — |
| F16 | 16 | 25.1 GB | lossless | — |
Can I run Mellum 2.1 12B-A2.5B locally?
- Can I run Mellum 2.1 12B-A2.5B locally?
- Mellum 2.1 12B-A2.5B needs about 6.7 GB of memory at a minimum and 11.2 GB recommended. Open this page to grade it against your GPU or Mac, then run it with runai, Ollama or LM Studio.
- How much VRAM does Mellum 2.1 12B-A2.5B need?
- At Q4_K_M, Mellum 2.1 12B-A2.5B uses about 6.6 GB of VRAM. Higher quants need more memory; lower quants fit tighter cards with a quality tradeoff.