GPT-4 vs Grok 3 Thinking

Compare GPT-4 by OpenAI against Grok 3 Thinking by xAI, context windows of 8K vs 128K, tested across 4 shared challenges. Updated April 2026.

Which is better, GPT-4 or Grok 3 Thinking?

GPT-4 and Grok 3 Thinking are both competitive models. Context windows: 8K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4 and Grok 3 Thinking

GPT-4 is made by openai while Grok 3 Thinking is from xai. GPT-4 has a 8K token context window compared to Grok 3 Thinking's 128K.

Our Verdict
Grok 3 Thinking
Grok 3 Thinking
GPT-4
GPT-4Runner-up

No community votes yet. On paper, Grok 3 Thinking has the edge — newer, bigger context window.

Too close to call
Writing DNA

Style Comparison

Similarity
95%

Grok 3 Thinking uses 63.7x more headings

GPT-4
Grok 3 Thinking
59%Vocabulary46%
18wSentence Length19w
1.10Hedging1.11
0.8Bold3.3
2.5Lists2.6
0.00Emoji0.00
0.00Headings0.64
0.45Transitions0.25
Based on 15 + 6 text responses
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GPT-4Grok 3 Thinking

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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