GPT-5.4 Pro vs xAI: Grok 4.3
Compare GPT-5.4 Pro by OpenAI against xAI: Grok 4.3 by xAI, context windows of 1.1M vs 1.0M, tested across 18 shared challenges.
Our Verdict
GPT-5.4 Pro
xAI: Grok 4.3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
xAI: Grok 4.3 is 72x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.4 Pro
Input
$30.00
Output
$180.00
xAI: Grok 4.3
Input
$1.25
24× cheaper
Output
$2.50
72× cheaper
xAI: Grok 4.3 is cheaper on both — 24× input, 72× output
Writing DNA
Style Comparison
Similarity
27%
xAI: Grok 4.3 uses 14.1x more transitions
GPT-5.4 Pro
xAI: Grok 4.3
50%Vocabulary62%
35wSentence Length16w
0.70Hedging0.46
7.5Bold2.3
8.3Lists2.5
0.00Emoji0.00
2.52Headings0.34
0.01Transitions0.14
Based on 12 + 27 text responses
Research
What we learned reading every model
FAQ
