DeepSeek R1 vs GPT-5.3-Codex
Compare DeepSeek R1 by DeepSeek against GPT-5.3-Codex by OpenAI, in 2 community votes, deepseek r1 and gpt-5.3-codex are closely matched, context windows of 128K vs 400K, tested across 52 shared challenges.
Web Design: DeepSeek R1 and GPT-5.3-Codex are tied
Our Verdict
GPT-5.3-CodexWinner
DeepSeek R1Runner-up
Votes are tied. GPT-5.3-Codex is newer and likely incorporates more recent improvements.
DeepSeek R1 is 6.4x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek R1
Input
$0.55
3.2× cheaper
Output
$2.19
6.4× cheaper
GPT-5.3-Codex
Input
$1.75
Output
$14.00
DeepSeek R1 is cheaper on both — 3.2× input, 6.4× output
Writing DNA
Style Comparison
Similarity
66%
DeepSeek R1 uses 10.1x more transitions
DeepSeek R1
GPT-5.3-Codex
62%Vocabulary65%
15wSentence Length23w
0.52Hedging0.51
8.0Bold6.5
5.7Lists6.2
0.04Emoji0.16
0.62Headings1.90
0.28Transitions0.03
Based on 22 + 23 text responses
Research
What we learned reading every model
FAQ
