Claude Opus 4.1 vs GPT OSS 120B
Compare Claude Opus 4.1 by Anthropic against GPT OSS 120B by OpenAI, context windows of 200K vs 131K, tested across 53 shared challenges.
Our Verdict
Claude Opus 4.1
GPT OSS 120B
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 94x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4.1
Input
$15.00
Output
$75.00
GPT OSS 120B
Input
$0.18
83× cheaper
Output
$0.80
94× cheaper
GPT OSS 120B is cheaper on both — 83× input, 94× output
Writing DNA
Style Comparison
Similarity
39%
Claude Opus 4.1 uses 4.6x more sentence length
Claude Opus 4.1
GPT OSS 120B
61%Vocabulary52%
87wSentence Length19w
0.54Hedging0.28
5.1Bold7.4
6.7Lists1.8
0.38Emoji0.15
1.68Headings0.73
0.13Transitions0.17
Based on 17 + 21 text responses
Research
What we learned reading every model
FAQ
