Qwen 3.5 397B-A17B · Performance per dollar
Qwen 3.5 397B-A17B — GB300 NVL72 vs MI355X performance per dollar
Cost per million tokens of GB300 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 →
Near the low end of the 68–314 tok/s/user interactivity band — at 129 tok/s/user — GB300 NVL72 runs $0.010 per million tokens on Qwen 3.5 397B-A17B while MI355X runs $0.013. GB300 NVL72 is the cheaper choice by 32%.
On Qwen 3.5 397B-A17B at 191 tok/s/user, the per-million math comes out to $0.017 for GB300 NVL72 and $0.024 for MI355X; GB300 NVL72 delivers 40% more total tokens per dollar.
At 253 tok/s/user on Qwen 3.5 397B-A17B, GB300 NVL72 costs $0.023 per million tokens; MI355X costs $0.069. GB300 NVL72 is 203% more cost-efficient at this operating point. (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): GB300 NVL72 $2.31/chip/hr · MI355X $1.50/chip/hr. Source: SemiAnalysis Market July 2026 Pricing Surveys & AI Cloud TCO Model.
Interpolated from real benchmark data. Edit target interactivity values below to compare at different operating points.
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Dollars per million tokens | GB300 NVL72$0.010MI355X$0.013 | GB300 NVL72$0.017MI355X$0.024 | GB300 NVL72$0.023MI355X$0.069 |
| Concurrency | GB300 NVL72~387MI355X~24 | GB300 NVL72~181MI355X~12 | GB300 NVL72~131MI355X~4 |