GPT-4 vs GPT OSS 20B

Compare GPT-4 and GPT OSS 20B, both from OpenAI, in 2 community votes, gpt oss 20b wins 100% of head-to-head duels, context windows of 8K vs 131K, tested across 21 shared challenges. Updated February 2026.

In 2 community votes, GPT OSS 20B wins 100% of head-to-head duels. Based on blind community voting from the RIVAL open dataset of 2+ human preference judgments for this pair.

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