Speed test matrix
Nanbeige4.2-3B on RTX PRO 6000 Blackwell Server Edition 96GB
vllm · 0.26.1rc1.dev1235+g62f6de733 · BF166 contexts (8K–251K) × 8 concurrency levels (1–128) · prefill at 8K, 16K, 32K, 64K, 128K, 251K, 256K
Hardware
- Type
- Discrete GPU
- GPU
- RTX PRO 6000 Blackwell Server Edition
- VRAM
- 96 GB
- OS
- linux
Engine
- Engine
- vllm
- Version
- 0.26.1rc1.dev1235+g62f6de733
- Quantization
- BF16
- Backend
- cuda
- Repository
- github.com/vllm-project/vllm
- Build
- cuda-13.2
- Commit
62f6de733d7a
Run
- Served model
- nanbeige
- Revision
- main
- Benchmark tool
- llm-inference-bench v0.7.6
- Decode test
- Fixed duration
- Prefill mode
- Measured during decode warm-up
- Time per measurement
- 30 s
- Max output
- 4,096 tokens
Launch command
"$HOME/env_rtxpro6k-nanbeige-vllm-pr-62f6de733d7a/bin/vllm" serve Nanbeige/Nanbeige4.2-3B --served-model-name nanbeige --tensor-parallel-size 1 --reasoning-parser qwen3 --enable-auto-tool-choice --tool-call-parser qwen3_coder --max-model-len 262144 --gpu-memory-utilization 0.79 --host 0.0.0.0 --port 8000 --api-key <redacted> --attention-backend FLASH_ATTN --speculative-config '{"method":"dspark","model":"Nanbeige/Nanbeige4.2-3B-DSpark","num_speculative_tokens":7}'Prefill
prompt tok/s by context length8K context18.3K447 ms TTFT
16K context14.5K1,115 ms TTFT
32K context10.3K3,128 ms TTFT
64K context6,4519,961 ms TTFT
128K context3,67334,941 ms TTFT
251K context1,995126,054 ms TTFT
256K context1,963130,694 ms TTFT
Sustained decode
total tok/s · rows are context length, columns are simultaneous requests| Context | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 |
|---|---|---|---|---|---|---|---|---|
| 8K | 99.742 ms TTFT | 210.570 ms TTFT | 303.396 ms TTFT | 469.3131 ms TTFT | 660.2221 ms TTFT | Over capacity | Over capacity | Over capacity |
| 16K | 82.467 ms TTFT | 150.6100 ms TTFT | 201.7146 ms TTFT | 301.9219 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity |
| 32K | 47.1116 ms TTFT | 101.1164 ms TTFT | 117.9240 ms TTFT | 173.6390 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity |
| 64K | 27.9221 ms TTFT | 61.4349 ms TTFT | 65.4518 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity |
| 128K | 14.2487 ms TTFT | 32.6721 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity |
| 251K | 10.01,132 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity |
Over capacity: not run because this many requests at this context would exceed the server's KV cache.
TTFT is measured after the benchmark warms the server's prompt cache, so it mostly excludes prefill.
All measurements
Latencies are medians. Total tok/s is output across all simultaneous requests.| Phase | Context | Requests at once | Status | Total tok/s | Per request tok/s | TTFT | Time between tokens | Average active requests | Completed requests | Output tokens | Measured for |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Prefill | 8K | 1 | Valid | 18.3K | — | 447 ms | — | — | 1 | — | — |
| Prefill | 16K | 1 | Valid | 14.5K | — | 1,115 ms | — | — | 1 | — | — |
| Prefill | 32K | 1 | Valid | 10.3K | — | 3,128 ms | — | — | 1 | — | — |
| Prefill | 64K | 1 | Valid | 6,451.0 | — | 9,961 ms | — | — | 1 | — | — |
| Prefill | 128K | 1 | Valid | 3,673.0 | — | 34,941 ms | — | — | 1 | — | — |
| Prefill | 251K | 1 | Valid | 1,995.0 | — | 126,054 ms | — | — | 1 | — | — |
| Prefill | 256K | 1 | Valid | 1,963.0 | — | 130,694 ms | — | — | 1 | — | — |
| Sustained decode | 8K | 1 | Valid | 99.7 | 101.1 | 42 ms | 9.9 ms | 1.0 | 0 | 2,988 | 30.0 s |
| Sustained decode | 8K | 2 | Valid | 210.5 | 107.4 | 70 ms | 9.3 ms | 2.0 | 0 | 6,312 | 30.0 s |
| Sustained decode | 8K | 4 | Valid | 303.3 | 77.4 | 96 ms | 12.9 ms | 4.0 | 0 | 9,093 | 30.0 s |
| Sustained decode | 8K | 8 | Valid | 469.3 | 59.0 | 131 ms | 17.0 ms | 8.0 | 0 | 14,075 | 30.0 s |
| Sustained decode | 8K | 16 | Valid | 660.2 | 42.3 | 221 ms | 23.6 ms | 16.0 | 0 | 19,795 | 30.0 s |
| Sustained decode | 8K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 8K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 8K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 1 | Valid | 82.4 | 82.9 | 67 ms | 12.1 ms | 1.0 | 0 | 2,471 | 30.0 s |
| Sustained decode | 16K | 2 | Valid | 150.6 | 76.7 | 100 ms | 13.1 ms | 2.0 | 0 | 4,512 | 30.0 s |
| Sustained decode | 16K | 4 | Valid | 201.7 | 51.2 | 146 ms | 19.5 ms | 4.0 | 0 | 6,050 | 30.0 s |
| Sustained decode | 16K | 8 | Valid | 301.9 | 38.4 | 219 ms | 26.1 ms | 8.0 | 0 | 9,042 | 30.0 s |
| Sustained decode | 16K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 1 | Valid | 47.1 | 47.9 | 116 ms | 20.9 ms | 1.0 | 0 | 1,413 | 30.0 s |
| Sustained decode | 32K | 2 | Valid | 101.1 | 50.8 | 164 ms | 19.7 ms | 2.0 | 0 | 3,027 | 30.0 s |
| Sustained decode | 32K | 4 | Valid | 117.9 | 30.5 | 240 ms | 32.8 ms | 4.0 | 0 | 3,538 | 30.0 s |
| Sustained decode | 32K | 8 | Valid | 173.6 | 22.6 | 390 ms | 44.3 ms | 8.0 | 0 | 5,201 | 30.0 s |
| Sustained decode | 32K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 1 | Valid | 27.9 | 29.1 | 221 ms | 34.3 ms | 1.0 | 0 | 836 | 30.0 s |
| Sustained decode | 64K | 2 | Valid | 61.4 | 31.0 | 349 ms | 32.3 ms | 2.0 | 0 | 1,842 | 30.0 s |
| Sustained decode | 64K | 4 | Valid | 65.4 | 16.8 | 518 ms | 59.7 ms | 4.0 | 0 | 1,960 | 30.0 s |
| Sustained decode | 64K | 8 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 1 | Valid | 14.2 | 14.5 | 487 ms | 69.0 ms | 1.0 | 0 | 425 | 29.9 s |
| Sustained decode | 128K | 2 | Valid | 32.6 | 16.6 | 721 ms | 60.2 ms | 2.0 | 0 | 974 | 29.9 s |
| Sustained decode | 128K | 4 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 8 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 1 | Valid | 10.0 | 11.2 | 1,132 ms | 89.6 ms | 1.0 | 0 | 300 | 29.9 s |
| Sustained decode | 251K | 2 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 4 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 8 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 251K | 128 | Over capacity | — | — | — | — | — | — | — | — |
Over capacity: not run because this many requests at this context would exceed the server's KV cache.