OpenAI: GPT-5.6 Sol vs Grok Code Fast 1
Compare OpenAI: GPT-5.6 Sol by OpenAI against Grok Code Fast 1 by xAI, context windows of 1.1M vs 256K, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Sol
Grok Code Fast 1Runner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Sol has the edge — bigger model tier, newer, bigger context window.
Grok Code Fast 1 is 20x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Sol
Input
$5.00
Output
$30.00
Grok Code Fast 1
Input
$0.20
25× cheaper
Output
$1.50
20× cheaper
Grok Code Fast 1 is cheaper on both — 25× input, 20× output
Writing DNA
Style Comparison
Similarity
78%
Grok Code Fast 1 uses 1.8x more emoji
OpenAI: GPT-5.6 Sol
Grok Code Fast 1
63%Vocabulary60%
15wSentence Length17w
0.79Hedging0.97
3.4Bold2.8
3.8Lists2.5
0.03Emoji0.06
0.95Headings0.89
0.08Transitions0.11
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
