Gemma · 9B to 32B
Gemma 4 31B Instruct
31.27 billion parameters across 60 layers. At four-bit precision the weights alone come to 17.58 GB, before any conversation is loaded. Grouped-query attention keeps the cache small, so long contexts cost less here than on models of the same size.
Memory needed, by quantisation
At an 8k context window. Quality is our rough ranking of how much the compression costs you: anything at or above Q5 is hard to tell apart from the original in normal use.
| Quantisation | File size | KV cache | Total VRAM | Quality | What it costs you |
|---|---|---|---|---|---|
| Q8_0 | 30.94 GB | 0.94 GB | 32.81 GB | 99% | Lossless in practice. Use it when the memory is there. |
| Q6_K | 23.88 GB | 0.94 GB | 25.75 GB | 98% | Very close to Q8 for two thirds of the size. |
| Q5_K_M | 20.71 GB | 0.94 GB | 22.58 GB | 96% | The quality-first choice when Q6 will not fit. |
| Q4_K_M | 17.58 GB | 0.94 GB | 19.45 GB | 93% | The default. Best size-to-quality ratio for local use. |
| IQ4_XS | 15.47 GB | 0.94 GB | 17.34 GB | 91% | Importance-matrix 4-bit. Q4_K_S quality, smaller file. |
| Q3_K_M | 14.23 GB | 0.94 GB | 16.1 GB | 86% | Degradation starts to show. A way to fit one size up. |
| IQ3_XXS | 11.14 GB | 0.94 GB | 13.01 GB | 79% | Aggressive. Only worth it on very large models. |
What a longer conversation costs
Same model at Q4_K_M, only the context window changes. This model uses sliding-window attention, so most layers stop growing past 1k tokens and the bill flattens out.
| Context | KV cache | Total VRAM | Fits in 8 GB | Fits in 12 GB | Fits in 24 GB |
|---|---|---|---|---|---|
| 4k | 0.94 GB | 19.29 GB | no | no | yes |
| 8k | 0.94 GB | 19.45 GB | no | no | yes |
| 16k | 0.94 GB | 19.78 GB | no | no | yes |
| 32k | 0.94 GB | 20.43 GB | no | no | yes |
| 64k | 0.94 GB | 21.75 GB | no | no | yes |
| 128k | 0.94 GB | 24.37 GB | no | no | no |
The "fits" columns allow for the roughly 0.8 GB Windows keeps for the desktop.
Which hardware runs Gemma 4 31B Instruct
56 of 118 consumer devices run it at a quantisation worth using, at an 8k context window. Another 42 can load it only by compressing the weights far enough to damage the model, marked with a warning below.
| Device | Memory | Verdict | Quantisation | Used | Speed |
|---|---|---|---|---|---|
| RTX PRO 6000 Blackwell NVIDIA | 96 GB | Runs great | Q8_0 | 32.81 GB | 46.1 t/s |
| RTX 6000 Ada Generation NVIDIA | 48 GB | Runs well | Q8_0 | 32.81 GB | 24.7 t/s |
| Apple M3 Ultra 96GB Apple | 96 GB | Runs well | Q8_0 | 32.51 GB | 20 t/s |
| Apple M3 Ultra 256GB Apple | 256 GB | Runs well | Q8_0 | 32.51 GB | 20 t/s |
| Apple M3 Ultra 512GB Apple | 512 GB | Runs well | Q8_0 | 32.51 GB | 20 t/s |
| RTX A6000 NVIDIA | 48 GB | Runs well | Q8_0 | 32.81 GB | 19.8 t/s |
| Apple M1 Ultra 64GB Apple | 64 GB | Runs well | Q8_0 | 32.51 GB | 19.6 t/s |
| Apple M1 Ultra 128GB Apple | 128 GB | Runs well | Q8_0 | 32.51 GB | 19.6 t/s |
| Apple M2 Ultra 64GB Apple | 64 GB | Runs well | Q8_0 | 32.51 GB | 19.6 t/s |
| Apple M2 Ultra 128GB Apple | 128 GB | Runs well | Q8_0 | 32.51 GB | 19.6 t/s |
| Apple M2 Ultra 192GB Apple | 192 GB | Runs well | Q8_0 | 32.51 GB | 19.6 t/s |
| Radeon PRO W7900 AMD | 48 GB | Runs well | Q8_0 | 32.81 GB | 19.5 t/s |
| GeForce RTX 5090 NVIDIA | 32 GB | Runs great | Q6_K | 25.75 GB | 59.2 t/s |
| GeForce RTX 4090 NVIDIA | 24 GB | Just fits | Q5_K_M | 22.58 GB | 38.2 t/s |
| GeForce RTX 3090 Ti NVIDIA | 24 GB | Just fits | Q5_K_M | 22.58 GB | 38.2 t/s |
| GeForce RTX 3090 NVIDIA | 24 GB | Just fits | Q5_K_M | 22.58 GB | 35.4 t/s |
| GeForce RTX 5090 Laptop NVIDIA | 24 GB | Just fits | Q5_K_M | 22.58 GB | 33.9 t/s |
| Radeon RX 7900 XTX AMD | 24 GB | Just fits | Q5_K_M | 22.58 GB | 31.9 t/s |
| RTX A5000 NVIDIA | 24 GB | Just fits | Q5_K_M | 22.58 GB | 29.1 t/s |
| Apple M4 Max 36GB Apple | 36 GB | Runs well | Q5_K_M | 22.28 GB | 19.7 t/s |
| Apple M4 Max 48GB Apple | 48 GB | Runs well | Q8_0 | 32.51 GB | 13.4 t/s |
| Apple M4 Max 64GB Apple | 64 GB | Runs well | Q8_0 | 32.51 GB | 13.4 t/s |
| Apple M4 Max 128GB Apple | 128 GB | Runs well | Q8_0 | 32.51 GB | 13.4 t/s |
| Radeon RX 7900 XT AMD | 20 GB | Runs great | IQ4_XS | 17.34 GB | 35.1 t/s |
| Apple M1 Max 32GB Apple | 32 GB | Just fits | Q5_K_M | 22.28 GB | 14.4 t/s |
| Apple M2 Max 32GB Apple | 32 GB | Just fits | Q5_K_M | 22.28 GB | 14.4 t/s |
| Apple M3 Max 36GB Apple | 36 GB | Runs well | Q5_K_M | 22.28 GB | 14.4 t/s |
| Apple M1 Max 64GB Apple | 64 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| Apple M2 Max 64GB Apple | 64 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| Apple M2 Max 96GB Apple | 96 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| Apple M3 Max 48GB Apple | 48 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| Apple M3 Max 64GB Apple | 64 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| Apple M3 Max 96GB Apple | 96 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| Apple M3 Max 128GB Apple | 128 GB | Runs well | Q6_K | 25.45 GB | 12.6 t/s |
| NVIDIA DGX Spark 128GB NVIDIA | 128 GB | Runs well | Q5_K_M | 22.58 GB | 10.3 t/s |
| Apple M4 Pro 48GB Apple | 48 GB | Runs well | Q4_K_M | 19.15 GB | 11.5 t/s |
| Apple M4 Pro 64GB Apple | 64 GB | Runs well | Q4_K_M | 19.15 GB | 11.5 t/s |
| Apple M4 Pro 24GB Apple | 24 GB | Just fits | Q3_K_M | 15.8 GB | 14 t/s |
| Jetson AGX Orin 32GB NVIDIA | 32 GB | Runs well | IQ4_XS | 17.34 GB | 10.2 t/s |
| Jetson AGX Orin 64GB NVIDIA | 64 GB | Runs well | IQ4_XS | 17.34 GB | 10.2 t/s |
| Ryzen AI Max+ 395 32GB AMD | 32 GB | Runs well | IQ4_XS | 17.34 GB | 10.1 t/s |
| Ryzen AI Max+ 395 64GB AMD | 64 GB | Runs well | IQ4_XS | 17.34 GB | 10.1 t/s |
| Ryzen AI Max+ 395 96GB AMD | 96 GB | Runs well | IQ4_XS | 17.34 GB | 10.1 t/s |
| Ryzen AI Max+ 395 128GB AMD | 128 GB | Runs well | IQ4_XS | 17.34 GB | 10.1 t/s |
| GeForce RTX 5080 NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 65.2 t/s |
| GeForce RTX 5070 Ti NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 60.8 t/s |
| GeForce RTX 5080 Laptop NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 52.1 t/s |
| GeForce RTX 4080 SUPER NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 50 t/s |
| GeForce RTX 4080 NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 48.7 t/s |
| GeForce RTX 4070 Ti SUPER NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 45.6 t/s |
| GeForce RTX 4090 Laptop NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 39.1 t/s |
| Radeon RX 9070 XT AMD | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 38.5 t/s |
| Radeon RX 9070 AMD | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 38.5 t/s |
| Radeon RX 7800 XT AMD | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 37.2 t/s |
| Radeon RX 7900 GRE AMD | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 34.3 t/s |
| Radeon RX 6900 XT AMD | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 30.5 t/s |
| Radeon RX 6800 AMD | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 30.5 t/s |
| GeForce RTX 5060 Ti 16GB NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 30.4 t/s |
| RTX A4000 NVIDIA | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 30.4 t/s |
| Arc A770 16GB Intel | 16 GB | Runs great | IQ3_XXS ! | 13.01 GB | 30.1 t/s |
What to buy to run Gemma 4 31B Instruct
The cheapest hardware that runs it at a quantisation worth using and a speed you would not resent, at an 8k context window.
Cheapest that works
Radeon RX 7900 XT
$650
IQ4_XS · uses 17.34 GB of its 20 GB · about 35.1 tokens/s
Best value
GeForce RTX 3090
$700 used
Q5_K_M · about 35.4 tokens/s · 936 GB/s
| Device | Price | Memory | Runs it at | Speed | |
|---|---|---|---|---|---|
| Radeon RX 7900 XT AMD | $650 | 20 GB | IQ4_XS | 35.1 t/s | Check price |
| GeForce RTX 3090 NVIDIA | $700 used | 24 GB | Q5_K_M | 35.4 t/s | Check price |
| GeForce RTX 3090 Ti NVIDIA | $800 used | 24 GB | Q5_K_M | 38.2 t/s | Check price |
| Apple M1 Max 32GB Apple · whole machine | $1,400 | 32 GB | Q4_K_M | 16.8 t/s | Check price |
| Apple M1 Max 64GB Apple · whole machine | $1,900 | 64 GB | Q4_K_M | 16.8 t/s | Check price |
| GeForce RTX 5090 NVIDIA | $2,200 | 32 GB | Q6_K | 59.2 t/s | Check price |
| Apple M1 Ultra 128GB Apple · whole machine | $3,400 | 128 GB | Q8_0 | 19.6 t/s | Check price |
| Apple M3 Ultra 256GB Apple · whole machine | $5,599 | 256 GB | Q8_0 | 20 t/s | Check price |
Indicative prices reviewed 2026-09-01; used prices are marketplace typical. Options that cost more than a cheaper one with no more memory and no more speed are hidden. Price links are Amazon affiliate links. Change the standard, the context window or the budget in the buying tool.
Where it sits in the catalogue
Source: google/gemma-4-31B-it on Hugging Face. Downloaded 8.3M times in the last month. Published 2026-03-11. Architecture figures are read from the repository's own configuration file, so they move when the model does.
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