Kimi K3.1 Pro (2.8T-A104B) VRAM Requirements, KV Cache & Best GPUs
Kimi K3.1 Pro (2.8T-A104B) (2780B total, 104B active, Multi-head Latent Attention (MLA) MoE) uses 1570.1 GiB for 4-bit weights (Q4_K_M), requiring 1571.49 GiB at 8K context and 1573.94 GiB at 32K. · Hugging Face: moonshotai/Kimi-K3.1-Pro ↗ · GGUF: unsloth/Kimi-K3.1-Pro-GGUF ↗
Exceeds Available GPU Memory
Config-derived formula
HF config.json ↗
Required GPU Memory
1571.49 GiB
1687.37 GB (decimal)
Usable Hardware Memory
76 GiB
80 GB (physical)
Safe Headroom
-1495.49 GiB
1964% utilization
Est. Decode Throughput
~0.9 tok/s
104B active params
Est. Prefill Throughput
~2473 tok/s
4K Prompt TTFT: ~1657 ms
Est. Cost / 1M Tokens
$9382.72
Multi-head Latent Attention (MLA) MoE · Custom
Recommended Hardware for Current Configuration
Best Single GPU
Multi-GPU Required
—
Best Value / Used GPU
—
—
Apple Unified Memory
Exceeds 512 GB
—
Cloud From
DigitalOcean · $30.40 / hr
8x Instinct MI325X 256GB
Production Launch Commands
llama.cpp (GGUF)
llama-server -hf unsloth/Kimi-K3.1-Pro-GGUF:Q4_K_M \ --ctx-size 8192 -ngl 999 --flash-attn
vLLM
vllm serve moonshotai/Kimi-K3.1-Pro \ --max-model-len 8192 --gpu-memory-utilization 0.92
Live Token Speed Simulator (TTFT ~1657ms · ~0.9 tok/s)
[Kimi K3.1 Pro (2.8T-A104B) · 1571.49 GiB] allocated on target GPU. Prefill completed in TTFT window; streaming autoregressive tokens at memory-bandwidth-bound rate...
Cloud GPU Comparison & Rent-vs-Buy TCO
Verified public rates across RunPod, Vast.ai, Vultr, and DigitalOcean.
Purchase break-even
~3.7 months
Est. local power: $14.9 / mo
| Provider | Recommended Instance | Total VRAM | Hourly Rate | Monthly at Selected Hours | Billing Mode | Deploy |
|---|---|---|---|---|---|---|
| RunPod | 8x B300 288GB Blackwell Ultra (Community Cloud) | 2304 GB | $55.52 / hr | $6751.23 / mo | Per-second | Deploy GPU ↗ |
| Vast.ai | — | — | — | — | Spot / On-demand | Deploy GPU ↗ |
| Vultr ($300 Free Credit*) | — | — | — | — | Hourly | Deploy GPU ↗ |
| Vultr Cloud GPU | — | — | — | — | Hourly | Deploy GPU ↗ |
| DigitalOcean | 8x Instinct MI325X 256GB (Dedicated Instance) | 2048 GB | $30.40 / hr | $3696.64 / mo | Per-second | Deploy GPU ↗ |
Rates reflect public listings on the verification date and fluctuate with regional inventory.
Fine-Tuning VRAM Requirements (QLoRA / LoRA / Full) — Kimi K3.1 Pro (2.8T-A104B)
QLoRA (4b)
Exceeds Available GPU Memory
1585.83 GiB
Model Weights: 1570.1 GiB · Gradients + Optimizer: 14.56 GiB · Act: 1.17 GiB
Recommended GPU: Multi-GPU Required
LoRA (16b)
Exceeds Available GPU Memory
5202.6 GiB
Model Weights: 5178.15 GiB · Gradients + Optimizer: 22.88 GiB · Act: 1.57 GiB
Recommended GPU: Multi-GPU Required
Full BF16
Exceeds Available GPU Memory
21233.18 GiB
Model Weights: 5178.15 GiB · Gradients + Optimizer: 16052.26 GiB · Act: 2.77 GiB
Recommended GPU: Multi-GPU Required
Engineering Sizing Notes & Optimization Playbook
Quick Hardware Verdict
A single H100 80GB SXM (80GB) cannot hold 4-bit Kimi K3.1 Pro (2.8T-A104B) (1571.49 GiB at 8K) entirely in VRAM. Use multi-GPU tensor parallelism, offload layers to system RAM, or deploy on a larger cloud GPU.
KV Cache & Runtime Tuning
Kimi K3.1 Pro (2.8T-A104B) uses Multi-head Latent Attention (MLA) MoE (2780B total, 104B active per token). Moving from 8K to 32K context expands FP16 KV cache from 0.82 GiB to 3.27 GiB; enabling 8-bit KV cache (llama.cpp -ctk q8_0 -ctv q8_0 or vLLM --kv-cache-dtype fp8) saves 1.64 GiB at 32K (reducing total VRAM to 1572.3 GiB).
VRAM Scaling Across Context Windows (4K to 128K, 4-bit Weights)
Kimi K3.1 Pro (2.8T-A104B) × 50 GPUs (4-bit Q4_K_M)
| Target Hardware | Total VRAM | Memory Bandwidth | 4-bit @ 8K | 4-bit @ 32K | Decode Speed | Compatibility | Full Compatibility Report |
|---|---|---|---|---|---|---|---|
| NVIDIA RTX 3060 12GB | 12 GB (11.4 GiB) | 360 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 4060 Ti 16GB | 16 GB (15.2 GiB) | 288 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 5060 Ti 16GB | 16 GB (15.2 GiB) | 448 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 4070 Ti Super | 16 GB (15.2 GiB) | 672 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 4080 Super | 16 GB (15.2 GiB) | 736 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 5070 12GB | 12 GB (11.4 GiB) | 672 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 5070 Ti | 16 GB (15.2 GiB) | 896 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 5080 | 16 GB (15.2 GiB) | 960 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 3090 | 24 GB (22.8 GiB) | 936 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 4090 | 24 GB (22.8 GiB) | 1008 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 4090 D | 24 GB (22.8 GiB) | 1008 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 5090 | 32 GB (30.4 GiB) | 1792 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 5090 D | 32 GB (30.4 GiB) | 1792 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX A6000 | 48 GB (45.6 GiB) | 768 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX 6000 Ada | 48 GB (45.6 GiB) | 960 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA RTX PRO 6000 Blackwell | 96 GB (91.2 GiB) | 1792 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA DGX Spark (GB10 128GB) | 128 GB (99.8 GiB) | 273 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA L4 24GB | 24 GB (22.8 GiB) | 300 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA A40 48GB | 48 GB (45.6 GiB) | 696 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA L20 48GB | 48 GB (45.6 GiB) | 864 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA L40S 48GB | 48 GB (45.6 GiB) | 864 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA A800 80GB SXM | 80 GB (76 GiB) | 2039 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA A100 80GB SXM | 80 GB (76 GiB) | 2039 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA H800 80GB SXM | 80 GB (76 GiB) | 3350 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA H100 80GB SXM | 80 GB (76 GiB) | 3350 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA H20 96GB HBM3 | 96 GB (91.2 GiB) | 4000 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA H20 141GB HBM3e | 141 GB (133.9 GiB) | 4800 GB/s | 1571.49 GiB | 1573.94 GiB | ~1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA H200 141GB SXM | 141 GB (133.9 GiB) | 4800 GB/s | 1571.49 GiB | 1573.94 GiB | ~1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA B200 180GB | 180 GB (171 GiB) | 8000 GB/s | 1571.49 GiB | 1573.94 GiB | ~1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| NVIDIA B300 288GB Blackwell Ultra | 288 GB (273.6 GiB) | 8000 GB/s | 1571.49 GiB | 1573.94 GiB | ~1.1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Huawei Ascend 910B 64GB (昇腾) | 64 GB (60.8 GiB) | 1200 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Huawei Ascend 910C 128GB (昇腾) | 128 GB (121.6 GiB) | 2400 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Huawei Atlas 300I Duo 96GB (310P) | 96 GB (91.2 GiB) | 408 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Cambricon MLU590 80GB (寒武纪思元) | 80 GB (76 GiB) | 2048 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Hygon DCU K100-AI 64GB (海光深算) | 64 GB (60.8 GiB) | 1638 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| MetaX MetaX C500 64GB (沐曦曦云) | 64 GB (60.8 GiB) | 1800 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Kunlunxin Kunlunxin P800 64GB (昆仑芯) | 64 GB (60.8 GiB) | 1600 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Moore Threads MTT S4000 48GB (摩尔线程) | 48 GB (45.6 GiB) | 768 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| AMD Radeon RX 7900 XTX 24GB | 24 GB (22.8 GiB) | 960 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| AMD Radeon AI PRO R9700 32GB | 32 GB (30.4 GiB) | 640 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| AMD Ryzen AI Max+ 395 128GB | 128 GB (99.8 GiB) | 256 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| AMD Instinct MI300X 192GB | 192 GB (182.4 GiB) | 5300 GB/s | 1571.49 GiB | 1573.94 GiB | ~1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| AMD Instinct MI325X 256GB | 256 GB (243.2 GiB) | 6000 GB/s | 1571.49 GiB | 1573.94 GiB | ~1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| AMD Instinct MI355X 288GB | 288 GB (273.6 GiB) | 8000 GB/s | 1571.49 GiB | 1573.94 GiB | ~1.1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Intel Arc Pro B60 24GB | 24 GB (22.8 GiB) | 456 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Intel Gaudi 3 128GB HBM2e | 128 GB (121.6 GiB) | 3700 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Apple Mac mini M4 Pro 64GB | 64 GB (49.9 GiB) | 273 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Apple MacBook Pro M4 Max 128GB | 128 GB (99.8 GiB) | 546 GB/s | 1571.49 GiB | 1573.94 GiB | ~0.9 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Apple Mac Studio M4 Ultra 256GB | 256 GB (199.7 GiB) | 819 GB/s | 1571.49 GiB | 1573.94 GiB | ~1 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |
| Apple Mac Studio M3 Ultra 512GB | 512 GB (399.4 GiB) | 819 GB/s | 1571.49 GiB | 1573.94 GiB | ~1.2 tok/s | Exceeds Available GPU Memory | Full Compatibility Report → |