GPT-4.5 vs Grok Code Fast 1
Compare GPT-4.5 by OpenAI against Grok Code Fast 1 by xAI, context windows of 128K vs 256K, tested across 25 shared challenges.
Our Verdict
GPT-4.5
Grok Code Fast 1
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok Code Fast 1 is 100x 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
Grok Code Fast 1
Input
$0.20
375× cheaper
Output
$1.50
100× cheaper
Grok Code Fast 1 is cheaper on both — 375× input, 100× output
Writing DNA
Style Comparison
Similarity
60%
Grok Code Fast 1 uses 6.0x more emoji
GPT-4.5
Grok Code Fast 1
63%Vocabulary60%
16wSentence Length17w
0.57Hedging0.97
4.7Bold2.8
6.4Lists2.5
0.00Emoji0.06
1.30Headings0.89
0.54Transitions0.11
Based on 11 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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