Pixtral 12B (VLM) at FP16 needs 24.0 GB for its weights and 34.7 GB in total at 8K context with 8 concurrent users. That means it fits on a single RTX 6000 Ada 48GB. Every figure is computed by tokcalc's open-source capacity model.
| GPUs | Total VRAM | VRAM needed | Decode tok/s | Aggregate tok/s | TTFT | Cost / 1M tok | Fits? |
|---|---|---|---|---|---|---|---|
| 1× RTX | 48 GB | 34.7 GB | 26.00 | 312.0 | 4.36 s | $0.7123 | ✓ |
| 2× RTX | 96 GB | 34.7 GB | 44.20 | 1061 | 2.20 s | $0.4190 | ✓ |
| 4× RTX | 192 GB | 34.7 GB | 88.40 | 4243 | 1.11 s | $0.2095 | ✓ |
| 8× RTX | 384 GB | 34.7 GB | 176.8 | 16973 | 572.2 ms | $0.1047 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 35 | 687.2 MB | ✓ fits |
| 8K | 17 | 1.34 GB | ✓ fits |
| 33K | 4 | 5.37 GB | ✓ fits |
| 66K | 2 | 10.74 GB | ✓ fits |
| 131K | 1 | 21.47 GB | ✓ fits |
| GPU | GPUs | Aggregate tok/s | Cost / 1M tok |
|---|---|---|---|
| RTX 5090 32GB | 2× | 1980 | $0.1403 |
| AMD MI300X 192GB | 1× | 1723 | $0.4032 |
| A100 40GB SXM4 | 1× | 503.8 | $0.4963 |
| AMD MI325X 288GB | 1× | 1950 | $0.4986 |
| A100 80GB SXM4 | 1× | 650.0 | $0.5128 |
| Intel Gaudi 3 128GB | 1× | 1073 | $0.5180 |
Yes. Pixtral 12B (VLM) at FP16 needs 34.7 GB including the KV cache, and RTX 6000 Ada 48GB has 48 GB — so it fits on a single GPU.
26.00 tokens/sec per stream and 312.0 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 4.36 s, and inter-token latency is 38.5 ms.
$0.7123 per 1M output tokens at 1× RTX 6000 Ada 48GB ($0.8000/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.
24.0 GB for the weights at FP16, plus 10.7 GB of KV cache for 8 concurrent requests at 8K context — 34.7 GB total. Every extra concurrent user at long context costs more, so leave headroom.
It works. Compare $0.7123 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 4× RTX 3080 10GB at $0.0662, and the fastest is 1× Cerebras CS-3 (WSE-3) at 6500 tok/s.
Same formulas, your context length, concurrency, and quantisation.