Qwen 3.5 397B-A17B — GB200 NVL72 vs MI355X Performance per Dollar
Cost per million tokens of GB200 NVL72 (NVIDIA Blackwell) versus MI355X (AMD CDNA 4) on Qwen 3.5 397B-A17B. Large-hyperscaler-volume ownership TCO normalized by total tokens — performance per dollar across LLM workloads. Pick the more cost-efficient SKU at every target interactivity level. 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 101 tok/s/user on Qwen 3.5 397B-A17B, MI355X comes in at $0.01 per million tokens. GB200 NVL72 hasn't been benchmarked at this operating point.
Only MI355X has cost data at 172 tok/s/user on Qwen 3.5 397B-A17B — $0.02 per million tokens. GB200 NVL72 is unmeasured at this target.
MI355X costs $0.07 per million tokens at 243 tok/s/user on Qwen 3.5 397B-A17B; we have no GB200 NVL72 benchmark data at this exact target. (Numbers reflect the default agentic-traces · fp8 selection for this URL — table and chart below update if you change sequence, precision, or model in the controls.)
Chip pricing (owning hyperscaler): GB200 NVL72 $1.86/chip/hr · MI355X $1.50/chip/hr. Source: SemiAnalysis Market July 2026 Pricing Surveys & AI Cloud TCO Model.
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Dollar per Million Tokens | GB200 NVL72:—MI355X:$0.011 | GB200 NVL72:—MI355X:$0.020 | GB200 NVL72:—MI355X:$0.067 |
| Concurrency | GB200 NVL72:—MI355X:~33 | GB200 NVL72:—MI355X:~15 | GB200 NVL72:—MI355X:~4 |