GPT-5 Codex vs Grok Code Fast 1
Compare GPT-5 Codex by OpenAI against Grok Code Fast 1 by xAI, in 21 community votes, gpt-5 codex wins 70% of head-to-head duels, tested across 50 shared challenges.
Reasoning: GPT-5 Codex wins 63% of votes
Web Design: GPT-5 Codex wins 88% of votes
Image Generation: GPT-5 Codex wins 67% of votes
Our Verdict
GPT-5 CodexWinner
Grok Code Fast 1Runner-up
Pick GPT-5 Codex. In 21 blind votes, GPT-5 Codex wins 70% of the time. That's not luck.
GPT-5 Codex particularly excels in Web Design, Image Generation, Reasoning.
Clear winner
API pricing
Cost per 1M tokens
GPT-5 Codex
Input
—
Output
—
Grok Code Fast 1
Input
$0.20
Output
$1.50
Writing DNA
Style Comparison
Similarity
61%
Grok Code Fast 1 uses 2.5x more hedging
GPT-5 Codex
Grok Code Fast 1
64%Vocabulary60%
17wSentence Length17w
0.38Hedging0.97
2.3Bold2.8
3.5Lists2.5
0.15Emoji0.06
0.49Headings0.89
0.05Transitions0.11
Based on 13 + 23 text responses
Research
What we learned reading every model
FAQ
