Head-to-head AI inference benchmark comparison of B300 (NVIDIA Blackwell) and MI300X (AMD CDNA 3) 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
Near the low end of the 41β204 tok/s/user interactivity band, at 81 tok/s/user on DeepSeek V4.1 Flash 552B: B300 runs 242390 tok/s/chip at $0.00/M tokens, MI300X runs 7909 at $0.03/M. B300 is 1188% cheaper per token; B300 delivers 2965% more tok/s/chip.
Setting 122 tok/s/user as the target on DeepSeek V4.1 Flash 552B, B300 produces 163436 tok/s/chip ($0.00 per million tokens) and MI300X produces 4515 ($0.06). B300 is 1422% cheaper per token; B300 delivers 3520% more tok/s/chip.
At 163 tok/s/user interactivity on DeepSeek V4.1 Flash 552B, B300 delivers 121415 tok/s/chip at $0.01 per million tokens; MI300X delivers 3741 tok/s/chip at $0.07. B300 is 1264% cheaper per token; B300 delivers 3146% more tok/s/chip at this point. (Numbers reflect the default agentic-traces Β· fp4 selection for this URL β table and chart below update if you change sequence, precision, or model in the controls.)
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Throughput (tok/s/chip) | B300:242389.7MI300X:7909.4 | B300:163435.8MI300X:4514.9 | B300:121414.9MI300X:3740.6 |
| Cost ($/M tok) | B300:$0.003MI300X:$0.033 | B300:$0.004MI300X:$0.058 | B300:$0.005MI300X:$0.071 |
| tok/s/MW | B300:127573548MI300X:5690246 | B300:86018863MI300X:3248120 | B300:63902586MI300X:2691071 |
| Concurrency | B300:~81MI300X:~6 | B300:~53MI300X:~3 | B300:~33MI300X:~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.
