Kimi K3.1 Pro · Performance per Dollar

Kimi K3.1 Pro — B300 vs MI355X Performance per Dollar

Cost per million tokens of B300 (NVIDIA Blackwell) versus MI355X (AMD CDNA 4) on Kimi K3.1 Pro. 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 27–175 tok/s/user interactivity band — at 63 tok/s/user — B300 runs $0.07 per million tokens on Kimi K3.1 Pro while MI355X runs $0.05. MI355X is the cheaper choice by 63%.

Cost-per-million is essentially even between B300 ($0.10) and MI355X ($0.10) at 101 tok/s/user on Kimi K3.1 Pro.

At 138 tok/s/user on Kimi K3.1 Pro, B300 costs $0.12 per million tokens; MI355X costs $0.15. B300 is 23% more cost-efficient at this operating 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.)

Chip pricing (owning hyperscaler): B300 $2.26/chip/hr · MI355X $1.50/chip/hr. Source: SemiAnalysis Market July 2026 Pricing Surveys & AI Cloud TCO Model.

View full latency + throughput comparison →

MI355X vs B300: full specs & benchmarks across models →

Kimi K3.1 Pro: B300 versus MI355X cost per million tokens at matched interactivity levels — B300 versus MI355X cost per million tokens for this comparison's canonical default workload. Lower cost indicates better performance per dollar.

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)
Dollar per Million Tokens	B300:$0.074MI355X:$0.046	B300:$0.100MI355X:$0.099	B300:$0.123MI355X:$0.152
Concurrency	B300:~16MI355X:~16	B300:~15MI355X:~6	B300:~7MI355X:~3