GPT-4o (Omni) vs Grok 3
Compare GPT-4o (Omni) by OpenAI against Grok 3 by xAI, context windows of 128K vs 128K, tested across 53 shared challenges. Updated May 2026.
Which is better, GPT-4o (Omni) or Grok 3?
GPT-4o (Omni) and Grok 3 are both competitive models. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4o (Omni) and Grok 3
GPT-4o (Omni) is made by openai while Grok 3 is from xai. GPT-4o (Omni) has a 128K token context window compared to Grok 3's 128K.
API pricing
Per 1M tokens
GPT-4o (Omni)
Input
$2.50
Output
$10.00
Grok 3
Input
—
Output
—
Our Verdict
GPT-4o (Omni)
Grok 3
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
63%
GPT-4o (Omni) uses 3.3x more transitions
GPT-4o (Omni)
Grok 3
54%Vocabulary49%
18wSentence Length18w
0.72Hedging0.94
7.3Bold2.5
5.6Lists3.0
0.03Emoji0.04
1.40Headings0.65
0.26Transitions0.08
Based on 24 + 17 text responses
FAQ
