DeepSeek-Math and gpt-oss-20b don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek-Math shipped 489 days before gpt-oss-20b, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — DeepSeek-Math and gpt-oss-20b don't publish scores on any of the same benchmarks.