Devstral 2 (123B) and gpt-oss-20b don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. gpt-oss-20b shipped 126 days before Devstral 2 (123B), 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 — Devstral 2 (123B) and gpt-oss-20b don't publish scores on any of the same benchmarks.