Head-to-head AI inference benchmark comparison of B200 (NVIDIA Blackwell) and MI355X (AMD CDNA 4) on DeepSeek V4.1 Flash 552B. Latency, throughput, and cost across LLM workloads. Use the chart controls below to switch sequences, precisions, and metrics β 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 β
B200 posts 68999 tok/s/chip for $0.01 per million tokens at 200 tok/s/user on DeepSeek V4.1 Flash 552B; MI355X posts 56102 tok/s/chip for $0.01. B200 is 7% cheaper per token; B200 delivers 23% more tok/s/chip.
Throughput at 327 tok/s/user on DeepSeek V4.1 Flash 552B: B200 hits 28750 tok/s/chip, MI355X hits 23862. Per-million costs land at $0.02 and $0.02 respectively. B200 is 4% cheaper per token; B200 delivers 20% more tok/s/chip.
B200 / MI355X on DeepSeek V4.1 Flash 552B at 454 tok/s/user: 9876 / 14068 tok/s/chip, $0.05 / $0.03 per million tokens. MI355X is 64% cheaper per token; MI355X delivers 42% more tok/s/chip. (Numbers reflect the default agentic-traces Β· fp4 selection for this URL β table and chart below update if you change sequence, precision, or model in the controls.)
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Throughput (tok/s/chip) | B200:68998.7MI355X:56101.5 | B200:28750.2MI355X:23862.3 | B200:9875.7MI355X:14068.2 |
| Cost ($/M tok) | B200:$0.007MI355X:$0.007 | B200:$0.017MI355X:$0.017 | B200:$0.049MI355X:$0.030 |
| tok/s/MW | B200:40350125MI355X:26842841 | B200:16812964MI355X:11417384 | B200:5775245MI355X:6731212 |
| Concurrency | B200:~43MI355X:~20 | B200:~16MI355X:~6 | B200:~4MI355X:~1 |
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.
