Claude Sonnet 3.6 (2022-10-22) vs GPT-5.1 Codex Max
Compare Claude Sonnet 3.6 (2022-10-22) by Anthropic against GPT-5.1 Codex Max by OpenAI, tested across 53 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 3.6 (2022-10-22) or GPT-5.1 Codex Max?
Claude Sonnet 3.6 (2022-10-22) and GPT-5.1 Codex Max are both competitive models. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 3.6 (2022-10-22) and GPT-5.1 Codex Max
Claude Sonnet 3.6 (2022-10-22) is made by anthropic while GPT-5.1 Codex Max is from openai.
API pricing
Per 1M tokens
Claude Sonnet 3.6 (2022-10-22)
Input
$3.00
Output
$15.00
GPT-5.1 Codex Max
Input
—
Output
—
Our Verdict
GPT-5.1 Codex Max
Claude Sonnet 3.6 (2022-10-22)Runner-up
No community votes yet. On paper, GPT-5.1 Codex Max has the edge — bigger model tier, newer.
Too close to call
Writing DNA
Style Comparison
Similarity
58%
GPT-5.1 Codex Max uses 6.7x more bold
Claude Sonnet 3.6 (2022-10-22)
GPT-5.1 Codex Max
66%Vocabulary60%
74wSentence Length16w
0.72Hedging0.36
0.3Bold2.3
8.9Lists4.2
0.00Emoji0.00
0.06Headings0.12
0.09Transitions0.03
Based on 21 + 13 text responses
FAQ
