GPT-5.4 Nano vs Grok 4.20 Beta
Compare GPT-5.4 Nano by OpenAI against Grok 4.20 Beta by xAI, context windows of 400K vs 2.0M, tested across 53 shared challenges.
Our Verdict
Grok 4.20 Beta
GPT-5.4 NanoRunner-up
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, bigger context window.
GPT-5.4 Nano is 4.8x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.4 Nano
Input
$0.20
10× cheaper
Output
$1.25
4.8× cheaper
Grok 4.20 Beta
Input
$2.00
Output
$6.00
GPT-5.4 Nano is cheaper on both — 10× input, 4.8× output
Writing DNA
Style Comparison
Similarity
50%
GPT-5.4 Nano
Grok 4.20 Beta
51%Vocabulary57%
21wSentence Length20w
0.58Hedging0.35
7.1Bold4.2
5.5Lists3.7
0.01Emoji0.00
1.39Headings0.62
0.05Transitions0.14
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
