Claude 3 Opus vs GPT-5 Mini
Compare Claude 3 Opus by Anthropic against GPT-5 Mini by OpenAI, tested across 12 shared challenges. Updated May 2026.
Which is better, Claude 3 Opus or GPT-5 Mini?
Claude 3 Opus and GPT-5 Mini are both competitive models. Claude 3 Opus costs $15/M input tokens vs $0.25/M for GPT-5 Mini. Compare their real outputs side by side below.
Key Differences Between Claude 3 Opus and GPT-5 Mini
Claude 3 Opus is made by anthropic while GPT-5 Mini is from openai. On pricing, Claude 3 Opus costs $15/M input tokens vs $0.25/M for GPT-5 Mini.
API pricing
Per 1M tokens
Claude 3 Opus
Input
$15.00
Output
$75.00
GPT-5 Mini
Input
$0.25
60× cheaper
Output
$2.00
38× cheaper
GPT-5 Mini is cheaper on both — 60× input, 38× output
Our Verdict
Claude 3 Opus
GPT-5 Mini
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5 Mini is 38x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
48%
Claude 3 Opus uses 2.9x more hedging
Claude 3 Opus
GPT-5 Mini
54%Vocabulary62%
14wSentence Length21w
0.48Hedging0.16
0.0Bold0.0
3.0Lists3.4
0.00Emoji0.00
0.00Headings0.00
0.06Transitions0.05
Based on 3 + 15 text responses
FAQ
