Claude Opus 4.8 vs GPT-5.2 Pro
Compare Claude Opus 4.8 by Anthropic against GPT-5.2 Pro by OpenAI, context windows of 1.0M vs 400K, tested across 31 shared challenges.
Our Verdict
Claude Opus 4.8
GPT-5.2 ProRunner-up
No community votes yet. On paper, Claude Opus 4.8 has the edge — newer, bigger context window.
Claude Opus 4.8 is 6.7x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4.8
Input
$5.00
4.2× cheaper
Output
$25.00
6.7× cheaper
GPT-5.2 Pro
Input
$21.00
Output
$168.00
Claude Opus 4.8 is cheaper on both — 4.2× input, 6.7× output
Writing DNA
Style Comparison
Similarity
56%
Claude Opus 4.8 uses 77.6x more emoji
Claude Opus 4.8
GPT-5.2 Pro
60%Vocabulary62%
19wSentence Length19w
0.46Hedging0.39
4.7Bold8.6
3.2Lists3.8
0.78Emoji0.00
1.15Headings1.17
0.04Transitions0.02
Based on 27 + 10 text responses
Research
What we learned reading every model
FAQ
