Mistral Devstral Small 1.1 vs GPT OSS 20B

Compare Mistral Devstral Small 1.1 by Mistral AI against GPT OSS 20B by OpenAI, in 25 community votes, gpt oss 20b wins 60% of head-to-head duels, tested across 48 shared challenges. Updated February 2026.

In 25 community votes, GPT OSS 20B wins 60% of head-to-head duels. Mistral Devstral Small 1.1 leads in Image Generation, while GPT OSS 20B leads in Web Design, Reasoning. Based on blind community voting from the RIVAL open dataset of 25+ human preference judgments for this pair.