Claude Opus 4.7 vs xAI: Grok 4.5
Compare Claude Opus 4.7 by Anthropic against xAI: Grok 4.5 by xAI, context windows of 1.0M vs 500K, tested across 54 shared challenges.
Our Verdict
Claude Opus 4.7
xAI: Grok 4.5Runner-up
No community votes yet. On paper, Claude Opus 4.7 has the edge — bigger model tier, bigger context window.
xAI: Grok 4.5 is 4.2x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4.7
Input
$5.00
Output
$25.00
xAI: Grok 4.5
Input
$2.00
2.5× cheaper
Output
$6.00
4.2× cheaper
xAI: Grok 4.5 is cheaper on both — 2.5× input, 4.2× output
Writing DNA
Style Comparison
Similarity
53%
Claude Opus 4.7 uses 9.6x more emoji
Claude Opus 4.7
xAI: Grok 4.5
64%Vocabulary61%
20wSentence Length16w
0.51Hedging0.23
4.6Bold2.5
3.8Lists2.4
0.86Emoji0.09
1.60Headings0.48
0.03Transitions0.06
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
