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 — 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 →
Near the low end of the 27–190 tok/s/user interactivity band, at 68 tok/s/user on DeepSeek V4.1 Flash 552B: B300 runs 132836 tok/s/chip at $0.00/M tokens, MI300X runs 5745 at $0.05/M. B300 is 872% cheaper per token; B300 delivers 2212% more tok/s/chip.
Setting 109 tok/s/user as the target on DeepSeek V4.1 Flash 552B, B300 produces 79181 tok/s/chip ($0.01 per million tokens) and MI300X produces 3894 ($0.07). B300 is 755% cheaper per token; B300 delivers 1934% more tok/s/chip.
At 149 tok/s/user interactivity on DeepSeek V4.1 Flash 552B, B300 delivers 55513 tok/s/chip at $0.01 per million tokens; MI300X delivers 2118 tok/s/chip at $0.12. B300 is 1002% cheaper per token; B300 delivers 2521% more tok/s/chip at this point. (Numbers reflect the default agentic-traces · fp4 selection for this URL — table and chart below update if you change sequence, precision, or model in the controls.)
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Throughput (tok/s/chip) | B300:132835.8MI300X:5745.0 | B300:79181.0MI300X:3893.7 | B300:55512.8MI300X:2118.4 |
| Cost ($/M tok) | B300:$0.005MI300X:$0.046 | B300:$0.008MI300X:$0.068 | B300:$0.011MI300X:$0.125 |
| tok/s/MW | B300:69913579MI300X:4133059 | B300:41674191MI300X:2801249 | B300:29217281MI300X:1523994 |
| Concurrency | B300:~42MI300X:~9 | B300:~32MI300X:~5 | B300:~20MI300X:~2 |
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.
