GPT OSS 120B vs Inception: Mercury

Compare GPT OSS 120B by OpenAI against Inception: Mercury by Inception, in 6 community votes, gpt oss 120b wins 80% of head-to-head duels, context windows of 131K vs 32K, tested across 46 shared challenges. Updated April 2026.

Which is better, GPT OSS 120B or Inception: Mercury?

GPT OSS 120B is the better choice overall, winning 80% of 6 blind community votes on Rival. GPT OSS 120B costs $0.18/M input tokens vs $10/M for Inception: Mercury. Context windows: 131K vs 32K tokens. Compare their real outputs side by side below.

Key Differences Between GPT OSS 120B and Inception: Mercury

GPT OSS 120B is made by openai while Inception: Mercury is from inception. GPT OSS 120B has a 131K token context window compared to Inception: Mercury's 32K. On pricing, GPT OSS 120B costs $0.18/M input tokens vs $10/M for Inception: Mercury. In community voting, In 6 community votes, GPT OSS 120B wins 80% of head-to-head duels.

In 6 community votes, GPT OSS 120B wins 80% of head-to-head duels. GPT OSS 120B leads in Image Generation. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.

Image Generation: GPT OSS 120B wins 100% of votes
Web Design: GPT OSS 120B and Inception: Mercury are tied
Our Verdict
GPT OSS 120B
GPT OSS 120BWinner
Inception: Mercury
Inception: MercuryRunner-up

Pick GPT OSS 120B. In 6 blind votes, GPT OSS 120B wins 80% of the time. That's not luck.

GPT OSS 120B particularly excels in Image Generation. GPT OSS 120B is 13x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
97%

GPT OSS 120B uses 5.0x more transitions

GPT OSS 120B
Inception: Mercury
52%Vocabulary55%
19wSentence Length40w
0.28Hedging0.39
7.4Bold4.9
1.8Lists3.8
0.15Emoji0.04
0.73Headings1.04
0.17Transitions0.03
Based on 21 + 17 text responses
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GPT OSS 120BInception: Mercury

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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