OLMo 2 13B at FP16 needs 26.0 GB for its weights and 36.7 GB in total at 8K context with 8 concurrent users. That means it fits on a single TPU v5p (per-chip, 95GB). 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× TPU | 95 GB | 36.7 GB | 20.48 | 245.7 | 1.01 s | $4.75 | ✓ |
| 2× TPU | 190 GB | 36.7 GB | 34.81 | 835.4 | 522.8 ms | $2.79 | ✓ |
| 4× TPU | 380 GB | 36.7 GB | 69.61 | 3342 | 276.4 ms | $1.40 | ✓ |
| 8× TPU | 760 GB | 36.7 GB | 139.2 | 13366 | 153.2 ms | $0.6983 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 102 | 687.2 MB | ✓ fits |
| 8K | 51 | 1.34 GB | ✓ fits |
| 33K | 12 | 5.37 GB | ✓ fits |
| 66K | 6 | 10.74 GB | ✓ fits |
| 131K | 3 | 21.47 GB | ✓ fits |
| GPU | GPUs | Aggregate tok/s | Cost / 1M tok |
|---|---|---|---|
| RTX 5090 32GB | 2× | 1828 | $0.1520 |
| AMD MI300X 192GB | 1× | 1590 | $0.4368 |
| A100 40GB SXM4 | 1× | 465.0 | $0.5376 |
| AMD MI325X 288GB | 1× | 1800 | $0.5401 |
| A100 80GB SXM4 | 1× | 600.0 | $0.5556 |
| Intel Gaudi 3 128GB | 1× | 990.0 | $0.5612 |
Yes. OLMo 2 13B at FP16 needs 36.7 GB including the KV cache, and TPU v5p (per-chip, 95GB) has 95 GB — so it fits on a single GPU.
20.48 tokens/sec per stream and 245.7 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 1.01 s, and inter-token latency is 48.8 ms.
$4.75 per 1M output tokens at 1× TPU v5p (per-chip, 95GB) ($4.20/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.
26.0 GB for the weights at FP16, plus 10.7 GB of KV cache for 8 concurrent requests at 8K context — 36.7 GB total. Every extra concurrent user at long context costs more, so leave headroom.
It works. Compare $4.75 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 4× RTX 3080 10GB at $0.0717, and the fastest is 1× Cerebras CS-3 (WSE-3) at 6000 tok/s.
Same formulas, your context length, concurrency, and quantisation.