GPT OSS 120B
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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 April 2026.
Which is better, GPT OSS 120B or GPT OSS 20B?
GPT OSS 120B is the better choice overall, winning 79% of 40 blind community votes on Rival. GPT OSS 120B costs $0.18/M input tokens vs $0.02/M for GPT OSS 20B. Context windows: 131K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between GPT OSS 120B and GPT OSS 20B
GPT OSS 120B is made by openai while GPT OSS 20B is from openai. GPT OSS 120B has a 131K token context window compared to GPT OSS 20B's 131K. On pricing, GPT OSS 120B costs $0.18/M input tokens vs $0.02/M for GPT OSS 20B. In community voting, In 40 community votes, GPT OSS 120B wins 79% of head-to-head duels.
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.
Reasoning: GPT OSS 120B wins 78% of votes
Web Design: GPT OSS 120B wins 71% of votes
Image Generation: GPT OSS 120B wins 100% of votes
Our Verdict
GPT OSS 120BWinner
GPT OSS 20BRunner-up
Pick GPT OSS 120B. In 40 blind votes, GPT OSS 120B wins 79% of the time. That's not luck.
GPT OSS 120B particularly excels in Image Generation, Reasoning, Web Design. GPT OSS 20B is 8.0x cheaper per token — worth considering if cost matters.
Clear winner
Writing DNA
Style Comparison
Similarity
99%
GPT OSS 20B uses 1.9x more transitions
GPT OSS 120B
GPT OSS 20B
52%Vocabulary54%
19wSentence Length17w
0.28Hedging0.26
7.4Bold5.9
1.8Lists3.3
0.15Emoji0.10
0.73Headings0.75
0.17Transitions0.32
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