gpt-oss 20B on the NVIDIA RTX 5090

Best measured: 283 tokens/s generation and 9,848 tokens/s prompt processing (MXFP4, CUDA, FA on).

For comparison, our size-scaling estimate for this combination is 277 tok/s.

Every run

Quant	Backend	Generate tok/s	Prompt tok/s	Test	Build / by / notes	Source
MXFP4	CUDA FA on	283	9,848	tg128	ggerganov llama-bench model column: gpt-oss 20B MXFP4 MoE	llama.cpp discussion #15396

tg128 = generating 128 tokens; pp512 = reading a 512-token prompt (llama-bench). LocalScore averages several prompt and output lengths, so its numbers run lower than tg128.

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