GPT-5.5 vs GPT OSS 120B
Compare GPT-5.5 and GPT OSS 120B, both from OpenAI, context windows of 1.1M vs 131K, tested across 53 shared challenges.
Our Verdict
GPT-5.5
GPT OSS 120BRunner-up
No community votes yet. On paper, GPT-5.5 has the edge — newer, bigger context window.
GPT OSS 120B is 38x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.5
Input
$5.00
Output
$30.00
GPT OSS 120B
Input
$0.18
28× cheaper
Output
$0.80
38× cheaper
GPT OSS 120B is cheaper on both — 28× input, 38× output
Writing DNA
Style Comparison
Similarity
45%
GPT OSS 120B uses 15.4x more emoji
GPT-5.5
GPT OSS 120B
58%Vocabulary52%
18wSentence Length19w
0.74Hedging0.28
2.9Bold7.4
5.1Lists1.8
0.00Emoji0.15
1.68Headings0.73
0.03Transitions0.17
Based on 26 + 21 text responses
Research
What we learned reading every model
FAQ
