gpt-oss 120B — H200 vs MI355X
Head-to-head AI inference benchmark comparison of H200 (NVIDIA Hopper) and MI355X (AMD CDNA 4) on gpt-oss 120B. 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.
Near the low end of the 71–270 tok/s/user interactivity band, at 120 tok/s/user on gpt-oss 120B: H200 runs 2734 tok/s/chip at $0.12/M tokens, MI355X runs 8848 at $0.05/M. MI355X is 166% cheaper per token; MI355X delivers 224% more tok/s/chip.
Setting 170 tok/s/user as the target on gpt-oss 120B, H200 produces 1489 tok/s/chip ($0.23 per million tokens) and MI355X produces 4137 ($0.10). MI355X is 127% cheaper per token; MI355X delivers 178% more tok/s/chip.
At 220 tok/s/user interactivity on gpt-oss 120B, H200 delivers 759 tok/s/chip at $0.45 per million tokens; MI355X delivers 2238 tok/s/chip at $0.19. MI355X is 143% cheaper per token; MI355X delivers 195% more tok/s/chip at this point. (Numbers reflect the default 1k/1k · fp4 selection for this URL — table and chart below update if you change sequence, precision, or model in the controls.)
| Metric | Interactivity (tok/s/user) | Interactivity (tok/s/user) | Interactivity (tok/s/user) |
|---|---|---|---|
| Throughput (tok/s/chip) | H200:2733.9MI355X:8848.3 | H200:1489.5MI355X:4136.6 | H200:759.4MI355X:2238.0 |
| Cost ($/M tok) | H200:$0.124MI355X:$0.047 | H200:$0.227MI355X:$0.100 | H200:$0.452MI355X:$0.186 |
| tok/s/MW | H200:1995553MI355X:4233630 | H200:1087221MI355X:1979217 | H200:554293MI355X:1070834 |
| Concurrency | H200:~64MI355X:~38 | H200:~39MI355X:~12 | H200:~7MI355X:~5 |
Inference Performance
Inference performance metrics across different models, hardware configurations, and serving parameters.