Multilingual capabilities were evaluated using the MMMLU evaluation.
The gpt-oss-120b at high reasoning performs nearly as well as OpenAI o4-mini.
The MMMLU evaluation included professionally human-translated versions in 14 languages.
gpt-oss-120b's average accuracy in MMMLU high reasoning is 81.3%.
gpt-oss-20b's average accuracy in MMMLU high reasoning is 75.7%.
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