Head-to-head AI inference benchmark comparison of B200 (NVIDIA Blackwell) and B300 (NVIDIA Blackwell) on Qwen 3.8 Flash Next 176B-A6B. Latency, throughput, and cost across LLM workloads. Use the chart controls below to switch sequences, precisions, and metrics — same interactions as the main inference chart.
AgentX replays real coding-agent sessions rather than fixed-length prompts, so context grows turn over turn and most of each request is served from cache instead of being recomputed. That turns the comparison into a systems question: KV transfer between nodes, prefix-aware routing, and cache capacity all move the curve alongside raw chip throughput. Fixed-sequence workloads stay the clean baseline for kernel and silicon performance, so the two scenarios answer different questions about the same hardware. Learn more about AgentX →
Setting 82 tok/s/user as the target on Qwen 3.8 Flash Next 176B-A6B, B200 produces 63055 tok/s/chip ($0.01 per million tokens) and B300 produces 81505 ($0.01). B200 is 1% cheaper per token; B300 delivers 29% more tok/s/chip.
At 111 tok/s/user interactivity on Qwen 3.8 Flash Next 176B-A6B, B200 delivers 53999 tok/s/chip at $0.01 per million tokens; B300 delivers 65592 tok/s/chip at $0.01. B200 is 8% cheaper per token; B300 delivers 21% more tok/s/chip at this point.
B200 posts 42523 tok/s/chip for $0.01 per million tokens at 141 tok/s/user on Qwen 3.8 Flash Next 176B-A6B; B300 posts 50971 tok/s/chip for $0.01. B200 is 9% cheaper per token; B300 delivers 20% more tok/s/chip. (Numbers reflect the default agentic-traces · fp4 selection for this URL — table and chart below update if you change sequence, precision, or model in the controls.)
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Throughput (tok/s/chip) | B200:63054.5B300:81505.3 | B200:53999.0B300:65591.9 | B200:42523.0B300:50970.9 |
| Cost ($/M tok) | B200:$0.008B300:$0.008 | B200:$0.009B300:$0.010 | B200:$0.011B300:$0.012 |
| tok/s/MW | B200:36874001B300:42897518 | B200:31578338B300:34522039 | B200:24867232B300:26826810 |
| Concurrency | B200:~14B300:~16 | B200:~12B300:~13 | B200:~9B300:~10 |
Agentic inference metrics from the AgentX scenario and fixed-sequence inference metrics across models, hardware configurations, and serving parameters.
No measurements to plot for this selection. Review the benchmark controls above or adjust quick filters.
