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GPT OSS 120B vs Gemini 2.5 Pro Preview 06-05

Compare GPT OSS 120B by OpenAI against Gemini 2.5 Pro Preview 06-05 by Google AI, in 1 community votes, gemini 2.5 pro preview 06-05 wins 100% of head-to-head duels, context windows of 131K vs 1.0M, tested across 38 shared challenges. Updated March 2026.

Which is better, GPT OSS 120B or Gemini 2.5 Pro Preview 06-05?

Gemini 2.5 Pro Preview 06-05 is the better choice overall, winning 100% of 1 blind community votes on Rival. GPT OSS 120B costs $0.18/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 131K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between GPT OSS 120B and Gemini 2.5 Pro Preview 06-05

GPT OSS 120B is made by openai while Gemini 2.5 Pro Preview 06-05 is from google. GPT OSS 120B has a 131K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, GPT OSS 120B costs $0.18/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. In community voting, In 1 community votes, Gemini 2.5 Pro Preview 06-05 wins 100% of head-to-head duels.

In 1 community votes, Gemini 2.5 Pro Preview 06-05 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.

Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05Winner
GPT OSS 120B
GPT OSS 120BRunner-up

Pick Gemini 2.5 Pro Preview 06-05. In 1 blind votes, Gemini 2.5 Pro Preview 06-05 wins 100% of the time. That's not luck.

GPT OSS 120B is 13x cheaper per token — worth considering if cost matters.

Clear winner
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GPT OSS 120BGemini 2.5 Pro Preview 06-05
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