LLM Inference Benchmark Explorer
Qwen3.5-397B-A17B on 3× DGX Spark — INT4, vLLM, TP1, PP3 inference benchmark
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| Model | Qwen3.5-397B-A17B |
|---|---|
| Parameters | 397B |
| Intelligence Index | 21.4 |
| Agentic Index | — |
| Device | 3× DGX Spark |
| Quantization | INT4 |
| Max C | 0 |
| Chat Capacity | 0 |
| Agentic Capacity | 0 |
| TP | — |
| DP | — |
| PP | 3 |
| Engine | vLLM |
| Speculative Decoding | — |
| C | TTFT (ms) | TPS (tok/s) | Status |
|---|---|---|---|
| 1 | 500 | 17.05 | FAIL |
| 2 | 606 | 14.47 | FAIL |
| 4 | 785 | 10.44 | FAIL |
| 8 | 1101 | 6.99 | FAIL |
In OpenZeka's measurement, Qwen3.5-397B-A17B (397B parameters), served in INT4 format with vLLM on 3× DGX Spark (PP=3), reached a generation speed of 17 tok/s per request and a time to first token (TTFT) of 500 ms with a single request.
At the default speed targets (at least 20 tok/s per request, TTFT at most 1,000 ms) there is no capacity estimate for this configuration: no measured load level met them.
Notes: Ring topology, PP=3
Intelligence Index and Agentic Index values are published by Artificial Analysis and are reproduced here with attribution.
In OpenZeka's measurement, Qwen3.5-397B-A17B (397B parameters), served in INT4 format with vLLM on 3× DGX Spark (PP=3), reached a generation speed of 17 tok/s per request and a time to first token (TTFT) of 500 ms with a single request.
At the default speed targets (at least 20 tok/s per request, TTFT at most 1,000 ms) there is no capacity estimate for this configuration: no measured load level met them.