GPT OSS 20B vs xAI: Grok 4
Compare GPT OSS 20B by OpenAI against xAI: Grok 4 by xAI, context windows of 131K vs 256K, tested across 53 shared challenges.
Our Verdict
GPT OSS 20B
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 20B is 150x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT OSS 20B
Input
$0.02
150× cheaper
Output
$0.10
150× cheaper
xAI: Grok 4
Input
$3.00
Output
$15.00
GPT OSS 20B is cheaper on both — 150× input, 150× output
Writing DNA
Style Comparison
Similarity
43%
GPT OSS 20B uses 7.2x more transitions
GPT OSS 20B
xAI: Grok 4
54%Vocabulary53%
17wSentence Length18w
0.26Hedging0.67
5.9Bold2.7
3.3Lists2.7
0.10Emoji0.07
0.75Headings0.86
0.32Transitions0.04
Based on 21 + 21 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
