LLM Inference Benchmark Explorer
DeepSeek V4 Flash 0731 on 2× DGX Spark — NVFP4, vLLM, TP2, speculative decoding k=5 inference benchmark
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| Model | DeepSeek V4 Flash 0731 |
|---|---|
| Parameters | 304B |
| Intelligence Index | 34.3 |
| Agentic Index | 41 |
| Device | 2× DGX Spark |
| Quantization | NVFP4 |
| Max C | 4 |
| Chat Capacity | 16 |
| Agentic Capacity | 6 |
| TP | 2 |
| DP | — |
| PP | — |
| Engine | vLLM |
| Speculative Decoding | Yes |
| C | TTFT (ms) | TPS (tok/s) | Status |
|---|---|---|---|
| 1 | 308 | 47.34 | PASS |
| 2 | 416 | 32.37 | PASS |
| 4 | 532 | 22.53 | PASS |
| 8 | 686 | 15.65 | FAIL |
In OpenZeka's measurement, DeepSeek V4 Flash 0731 (304B parameters), served in NVFP4 format with vLLM and speculative decoding on 2× DGX Spark (TP=2), reached a generation speed of 47.3 tok/s per request and a time to first token (TTFT) of 308 ms with a single request.
Considering the speed targets and the available KV cache capacity, the estimated capacity is 16 users for chat use and 6 for agentic use. The realistic capacity will likely fall between these two values. In scenarios dominated by coding, tool use, long workflows and multi-agent use, capacity approaches the agentic estimate; where shorter interactions, standard conversations and lighter tasks dominate, it approaches the chat estimate.
Notes: B12X, DSpark k=5, GMU 0.85, block-size 256, KV fp8
Intelligence Index and Agentic Index values are published by Artificial Analysis and are reproduced here with attribution.
In OpenZeka's measurement, DeepSeek V4 Flash 0731 (304B parameters), served in NVFP4 format with vLLM and speculative decoding on 2× DGX Spark (TP=2), reached a generation speed of 47.3 tok/s per request and a time to first token (TTFT) of 308 ms with a single request.
Considering the speed targets and the available KV cache capacity, the estimated capacity is 16 users for chat use and 6 for agentic use. The realistic capacity will likely fall between these two values. In scenarios dominated by coding, tool use, long workflows and multi-agent use, capacity approaches the agentic estimate; where shorter interactions, standard conversations and lighter tasks dominate, it approaches the chat estimate.