GPT OSS 120B
Nothing here. The model returned empty. We stared at it for a while.
GPT OSS 120B vs xAI: Grok 4
Compare GPT OSS 120B by OpenAI against xAI: Grok 4 by xAI, context windows of 131K vs 256K, tested across 38 shared challenges. Updated April 2026.
Which is better, GPT OSS 120B or xAI: Grok 4?
GPT OSS 120B and xAI: Grok 4 are both competitive models. GPT OSS 120B costs $0.18/M input tokens vs $3/M for xAI: Grok 4. Context windows: 131K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between GPT OSS 120B and xAI: Grok 4
GPT OSS 120B is made by openai while xAI: Grok 4 is from xai. GPT OSS 120B has a 131K token context window compared to xAI: Grok 4's 256K. On pricing, GPT OSS 120B costs $0.18/M input tokens vs $3/M for xAI: Grok 4.
Our Verdict
GPT OSS 120B
xAI: Grok 4
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT OSS 120B is 19x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
100%
GPT OSS 120B uses 3.8x more transitions
GPT OSS 120B
xAI: Grok 4
52%Vocabulary53%
19wSentence Length18w
0.28Hedging0.67
7.4Bold2.7
1.8Lists2.7
0.15Emoji0.07
0.73Headings0.86
0.17Transitions0.04
Based on 21 + 21 text responses
vs
Ask them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
Free preview13 of 58 slides
FAQ