Claude Opus 4 vs GPT-5 Pro
Compare Claude Opus 4 by Anthropic against GPT-5 Pro by OpenAI, context windows of 200K vs 400K, tested across 41 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or GPT-5 Pro?
Claude Opus 4 and GPT-5 Pro are both competitive models. Claude Opus 4 costs $15/M input tokens vs $15/M for GPT-5 Pro. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and GPT-5 Pro
Claude Opus 4 is made by anthropic while GPT-5 Pro is from openai. Claude Opus 4 has a 200K token context window compared to GPT-5 Pro's 400K. On pricing, Claude Opus 4 costs $15/M input tokens vs $15/M for GPT-5 Pro.
API pricing
Per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
1.6× cheaper
GPT-5 Pro
Input
$15.00
Output
$120.00
Our Verdict
GPT-5 Pro
Claude Opus 4Runner-up
No community votes yet. On paper, GPT-5 Pro has the edge — newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
41%
Claude Opus 4 uses 444.0x more bold
Claude Opus 4
GPT-5 Pro
64%Vocabulary65%
62wSentence Length15w
0.52Hedging0.32
4.4Bold0.0
9.1Lists2.9
0.11Emoji0.00
1.87Headings0.00
0.27Transitions0.01
Based on 16 + 11 text responses
FAQ
