Gemma 3 12B vs GPT OSS 20B

Compare Gemma 3 12B by Google AI against GPT OSS 20B by OpenAI, in 311 community votes, gpt oss 20b wins 66% of head-to-head duels, tested across 45 shared challenges. Updated February 2026.

In 311 community votes, GPT OSS 20B wins 66% of head-to-head duels. Gemma 3 12B leads in Conversation, while GPT OSS 20B leads in Web Design, Reasoning, Image Generation. Based on blind community voting from the RIVAL open dataset of 311+ human preference judgments for this pair.