Claude Sonnet 3.6 (2022-10-22) vs GPT-5 Codex
Compare Claude Sonnet 3.6 (2022-10-22) by Anthropic against GPT-5 Codex by OpenAI, tested across 50 shared challenges. Updated June 2026.
Which is better, Claude Sonnet 3.6 (2022-10-22) or GPT-5 Codex?
Claude Sonnet 3.6 (2022-10-22) and GPT-5 Codex 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 Codex
Claude Sonnet 3.6 (2022-10-22) is made by anthropic while GPT-5 Codex is from openai.
Our Verdict
GPT-5 Codex
Claude Sonnet 3.6 (2022-10-22)Runner-up
No community votes yet. On paper, GPT-5 Codex has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 3.6 (2022-10-22)
Input
$3.00
Output
$15.00
GPT-5 Codex
Input
—
Output
—
Writing DNA
Style Comparison
Similarity
49%
GPT-5 Codex uses 14.6x more emoji
Claude Sonnet 3.6 (2022-10-22)
GPT-5 Codex
66%Vocabulary64%
74wSentence Length17w
0.72Hedging0.38
0.3Bold2.3
8.9Lists3.5
0.00Emoji0.15
0.06Headings0.49
0.09Transitions0.05
Based on 21 + 13 text responses
Research
What we learned reading every model
FAQ
