GPT OSS 120B vs GPT OSS 20B

Compare GPT OSS 120B and GPT OSS 20B, both from OpenAI, in 40 community votes, gpt oss 120b wins 79% of head-to-head duels, context windows of 131K vs 131K, tested across 49 shared challenges. Updated February 2026.

In 40 community votes, GPT OSS 120B wins 79% of head-to-head duels. GPT OSS 120B leads in Reasoning, Web Design, Image Generation. Based on blind community voting from the RIVAL open dataset of 40+ human preference judgments for this pair.