GPT-1 vs Grok 3

Compare GPT-1 by OpenAI against Grok 3 by xAI, in 2 community votes, grok 3 wins 100% of head-to-head duels, context windows of 1K vs 128K, tested across 7 shared challenges. Updated April 2026.

Which is better, GPT-1 or Grok 3?

Grok 3 is the better choice overall, winning 100% of 2 blind community votes on Rival. Context windows: 1K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-1 and Grok 3

GPT-1 is made by openai while Grok 3 is from xai. GPT-1 has a 1K token context window compared to Grok 3's 128K. In community voting, In 2 community votes, Grok 3 wins 100% of head-to-head duels.

In 2 community votes, Grok 3 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.

Our Verdict
Grok 3
Grok 3Winner
GPT-1
GPT-1Runner-up

Pick Grok 3. In 2 blind votes, Grok 3 wins 100% of the time. That's not luck.

Clear winner
Writing DNA

Style Comparison

Similarity
89%

Grok 3 uses 246.4x more bold

GPT-1
Grok 3
65%Vocabulary49%
14wSentence Length18w
0.27Hedging0.94
0.0Bold2.5
0.3Lists3.0
0.00Emoji0.04
0.00Headings0.65
0.41Transitions0.08
Based on 7 + 17 text responses
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GPT-1Grok 3

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

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185x

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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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