Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5 (medium) is clearly ahead on the aggregate, 82 to 32. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5 (medium)'s sharpest advantage is in knowledge, where it averages 76.7 against 73.7. The single biggest benchmark swing on the page is MMLU, 91 to 73.7. DBRX Instruct does hit back in coding, so the answer changes if that is the part of the workload you care about most.
GPT-5 (medium) is the reasoning model in the pair, while DBRX Instruct is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GPT-5 (medium) gives you the larger context window at 128K, compared with 32K for DBRX Instruct.
Pick GPT-5 (medium) if you want the stronger benchmark profile. DBRX Instruct only becomes the better choice if coding is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
GPT-5 (medium)
76.7
DBRX Instruct
73.7
GPT-5 (medium)
70
DBRX Instruct
70.1
GPT-5 (medium) is ahead overall, 82 to 32. The biggest single separator in this matchup is MMLU, where the scores are 91 and 73.7.
GPT-5 (medium) has the edge for knowledge tasks in this comparison, averaging 76.7 versus 73.7. Inside this category, MMLU is the benchmark that creates the most daylight between them.
DBRX Instruct has the edge for coding in this comparison, averaging 70.1 versus 70. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
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