GPT-5.3-Codex vs Grok 4.20 Multi-Agent Beta
Compare GPT-5.3-Codex by OpenAI against Grok 4.20 Multi-Agent Beta by xAI, context windows of 400K vs 2.0M, tested across 53 shared challenges.
Our Verdict
GPT-5.3-Codex
Grok 4.20 Multi-Agent Beta
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
API pricing
Cost per 1M tokens
GPT-5.3-Codex
Input
$1.75
1.1× cheaper
Output
$14.00
Grok 4.20 Multi-Agent Beta
Input
$2.00
Output
$6.00
2.3× cheaper
GPT-5.3-Codex wins input (1.1× cheaper)·Grok 4.20 Multi-Agent Beta wins output (2.3× cheaper)
Writing DNA
Style Comparison
Similarity
41%
GPT-5.3-Codex uses 15.8x more emoji
GPT-5.3-Codex
Grok 4.20 Multi-Agent Beta
65%Vocabulary59%
23wSentence Length16w
0.51Hedging0.41
6.5Bold2.7
6.2Lists2.4
0.16Emoji0.00
1.90Headings0.26
0.03Transitions0.02
Based on 23 + 23 text responses
Research
What we learned reading every model
FAQ
