Autor: Jakub Rusinowski · Ostatnia aktualizacja: 29 kwietnia 2026
Model library → IBM Granite 4.1 → Granite 4.1 30B
Largest Granite 4.1 tier — a hybrid Mamba2/attention design (interleaved SSM + attention layers), not MoE despite the 4.0 generation using MoE. ~18GB at FP8 (Q4 likely lower, ~12-15GB, unconfirmed). Context extendable to 512K. Apache 2.0.
Granite 4.1 30B needs about 19 GB of VRAM at FP8 (Q4 est. ~12-15GB, unconfirmed) — quantized weights plus framework overhead, before any KV cache. On Apple Silicon that figure comes out of unified memory.
| Parameters | 30 Billion |
| Context window | 128,000 |
| Architecture | Hybrid Mamba2 + Attention (SSM) |
| Provider | IBM |
| Licence | Apache 2.0 |
| Specified at | FP8 (Q4 est. ~12-15GB, unconfirmed) |
| System RAM | 32 GB |
| Record updated | 2026-04-29 |
Apache-2.0 — commercial use permitted. Commercial use permitted. No usage restrictions beyond attribution.
Modelled on a reference NVIDIA RTX 4090 (24 GB). Weights plus framework overhead only — this model publishes no architecture we can read, so no KV cache is included. A real session needs more; the figure is a floor, not a target. Speed figures are ESTIMATES from the memory-bandwidth roofline described on the methodology page, not benchmarks we ran — rows marked measured come from published or reader-submitted runs. VRAM here includes the KV cache, so it reads higher than the headline figure above, which does not.
| Quant | Bits/weight | Weights | VRAM needed | Est. speed | Fit on 24 GB |
|---|---|---|---|---|---|
| Q2_K | 2.63 | 9.9 GB | 10.7 GB | ~61 tok/s (est.) | Fits comfortably |
| Q3_K_M | 3.41 | 12.8 GB | 13.6 GB | ~49 tok/s (est.) | Fits comfortably |
| Q4_K_M | 4.83 | 18.1 GB | 18.9 GB | ~37 tok/s (est.) | Fits comfortably |
| Q5_K_M | 5.67 | 21.3 GB | 22.1 GB | ~32 tok/s (est.) | Tight fit |
| Q6_K | 6.56 | 24.6 GB | 25.4 GB | ~4 tok/s (est.) | Offloads to system RAM (slow) |
| Q8_0 | 8.50 | 31.9 GB | 32.7 GB | ~3 tok/s (est.) | Offloads to system RAM (slow) |
| F16 | 16.00 | 60 GB | 60.8 GB | — | Won't fit |
Want to set your own context length and KV-cache quantization? Use the interactive VRAM calculator.
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The cheapest catalogued GPU that runs Granite 4.1 30B is the AMD Radeon RX 7900 XT (20 GB).
Install Ollama, then run:
ollama run granite4.1:30bWeights on Hugging Face: ibm-granite/granite-4.1-30b.
Best for: enterprise, long context, reasoning, mid range gpu.
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