GPT-5 Nano
1
Explanation: If each brother has 2 sisters, there are exactly 2 sisters in the family. Since Sally is one of the sisters, she has 2 − 1 = 1 sister.
GPT-5 Nano vs Claude Opus 4
Compare GPT-5 Nano by OpenAI against Claude Opus 4 by Anthropic, tested across 32 shared challenges. Updated April 2026.
Which is better, GPT-5 Nano or Claude Opus 4?
GPT-5 Nano and Claude Opus 4 are both competitive models. Compare their real outputs side by side below.
Key Differences Between GPT-5 Nano and Claude Opus 4
GPT-5 Nano is made by openai while Claude Opus 4 is from anthropic.
Our Verdict
GPT-5 Nano
Claude Opus 4
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
Writing DNA
Style Comparison
Similarity
100%
Claude Opus 4 uses 444.0x more bold
GPT-5 Nano
Claude Opus 4
59%Vocabulary64%
25wSentence Length62w
0.23Hedging0.52
0.0Bold4.4
4.2Lists9.1
0.00Emoji0.11
0.00Headings1.87
0.01Transitions0.27
Based on 14 + 16 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
Free preview13 of 58 slides
FAQ