Kimi K3 2.8T — GB200 NVL72 vs MI355X
Head-to-head AI inference benchmark comparison of GB200 NVL72 (NVIDIA Blackwell) and MI355X (AMD CDNA 4) on Kimi K3 2.8T. 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 →
At 39 tok/s/user interactivity on Kimi K3 2.8T, GB200 NVL72 delivers 5366 tok/s/chip at $0.10 per million tokens; MI355X delivers 5708 tok/s/chip at $0.07. MI355X is 32% cheaper per token; MI355X delivers 6% more tok/s/chip at this point.
GB200 NVL72 posts 3563 tok/s/chip for $0.15 per million tokens at 66 tok/s/user on Kimi K3 2.8T; MI355X posts 2831 tok/s/chip for $0.15. GB200 NVL72 is 1% cheaper per token; GB200 NVL72 delivers 26% more tok/s/chip.
Throughput at 93 tok/s/user on Kimi K3 2.8T: GB200 NVL72 hits 2507 tok/s/chip, MI355X hits 1858. Per-million costs land at $0.21 and $0.22 respectively. GB200 NVL72 is 9% cheaper per token; GB200 NVL72 delivers 35% more tok/s/chip. (Numbers reflect the default agentic-traces · fp4 selection for this URL — table and chart below update if you change sequence, precision, or model in the controls.)
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Throughput (tok/s/chip) | GB200 NVL72:5365.6MI355X:5707.6 | GB200 NVL72:3562.8MI355X:2831.5 | GB200 NVL72:2507.4MI355X:1857.9 |
| Cost ($/M tok) | GB200 NVL72:$0.096MI355X:$0.073 | GB200 NVL72:$0.145MI355X:$0.147 | GB200 NVL72:$0.206MI355X:$0.224 |
| tok/s/MW | GB200 NVL72:2869290MI355X:2730892 | GB200 NVL72:1905222MI355X:1354763 | GB200 NVL72:1340848MI355X:888930 |
| Concurrency | GB200 NVL72:~19MI355X:~14 | GB200 NVL72:~16MI355X:~5 | GB200 NVL72:~16MI355X:~3 |