GPT-4.5 vs xAI: Grok 4.3
Compare GPT-4.5 by OpenAI against xAI: Grok 4.3 by xAI, context windows of 128K vs 1.0M, tested across 24 shared challenges.
Our Verdict
GPT-4.5
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 60x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-4.5
Input
$75.00
Output
$150.00
xAI: Grok 4.3
Input
$1.25
60× cheaper
Output
$2.50
60× cheaper
xAI: Grok 4.3 is cheaper on both — 60× input, 60× output
Writing DNA
Style Comparison
Similarity
61%
GPT-4.5 uses 3.8x more transitions
GPT-4.5
xAI: Grok 4.3
63%Vocabulary62%
16wSentence Length16w
0.57Hedging0.46
4.7Bold2.3
6.4Lists2.5
0.00Emoji0.00
1.30Headings0.34
0.54Transitions0.14
Based on 11 + 27 text responses
Research
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